Delivery Scope

testo 316-3 refrigerant leak detector for cooling agents, sensor head, carry case, calibration certificate, batteries, filter.

Refrigerant leak detector - testo 316-3
Model No: testo 316-3 Part No: 0563 3163

The handheld leak detector testo 316-3 can detect all the most common cooling agents along with even the smallest leaks. It also comes with an automatic zero setting that also enables you to locate leaks in contaminated rooms.

  1. High sensitivity < 4 g/a allows the detection of the smallest leaks
  2. Detects all common refrigerants
  3. Easiest possible operation thanks to a single button
  4. Immediate readiness with no pre-settings
  5. LED indicator of leakage with simultaneous audible alarm


The testo 316-3 refrigerant leak detector is one piece of kit every refrigerant technician would want himself to be equipped with. The handheld leak detector can detect all the most common cooling agents along with even the smallest leaks. Comes with an automatic zero setting that also enables you to locate leaks in contaminated rooms.   
 
Testo 316-3 leak detector– benefits at a glance : 
 
-  Can detect all common cooling agents: CFCs, HFCs, FCs 
-  Highly sensitive( < 4 g/a - 1g/a according to DIN EN14624:2012 standard) - can detect even the smallest leaks 
-  Ready for use – there’s no need to select cooling agent characteristics first 
-  Automatic zero setting – can detect leaks in rooms that are already contaminated 
-  Visual and audible alarm which are activated when a leak is detected 
-  Quick and easy sensor change 
-  Complies with specifications for F gases regulations, SAE norm J1627and DIN EN14624:2012 standard

General technical data
Operating humidity 20 to 80 %RH
Weight 500 g (incl. batteries)
Dimensions 270 x 60 x 61 mm
Operating temperature -18 to +50 °C
Product colour Black
Detectable R22; R134a; R404A; R410A; R507; R438A; and all CFCs, HFCs, and HCFCs
Sensitivity 4 g/a (0.15 oz/a)
Life-time sensor Approx. 80 to 100 h (corresponds to approx. 1 year)
Standards EN 14624:2012; SAE J1627
EU-/EG-guidelines 2004/108/EG
Battery type 2 x D
Battery life 16h permanent operation
Storage temperature 0 to +50 °C

Delivery Scope

testo 316-4 leak detector including refrigerant sensor head, case, mains unit and earphones.

Leak detector - testo 316-4
Model No: testo 316-4 Part No: 0563 3164

Testo 316-4 leak detector aids in carrying out quick, reliable leakage detection on refrigeration systems or heat pumps.

  1. Very high sensitivity of < 3g/a allows the detection of the smallest leaks
  2. Very long sensor life
  3. Optical and audible alarm for optimum leakage detection
  4. Permanent sensor check for fast and safe work
  5. Earphone connection for secure leakage detection in loud surroundings
  6. Trend display shows maximum leakages


Leaks on a refrigeration system or heat pump have serious consequences. The system no longer provides the required cooling capacity and, in the worst case scenario, system components can be damaged. Not to mention the environmental damage and the costs incurred by your customer. You need fast, reliable measuring instruments such as the testo 316-4 leak detector in order to be able to detect even the smallest of leaks.
  
Advantages of the testo 316-4 set 1 leak detector : 

An all-rounder in leak detection:  the testo 316-4 leak detector (set 1) is a fast, reliable leak detector for all common refrigerants. 
Practical sensor technology:  the leak detector's sensor is permanently monitored and displays malfunctions or contaminations on the screen. The use of test leaks is therefore no longer necessary. If dirty, the sensor can be easily cleaned and is then ready for use again straight away. Moreover, thanks to its flexible gooseneck, the sensor can be positioned close to the pipework or the measuring location.

High sensitivity:  its extremely high sensitivity of ?3g/a in accordance with EN 14624 enables reliable detection of even the smallest leaks. The drag pointer function indicates maximum leakages, making it easier to locate leaks 
Reliable warning functions:  if a leak is found, the display changes from green to red. An audible signal also indicates that a leak has been detected. The earphones included in the set also enable the testo 316-4 leak detector to be used in loud environments. 
Further options for ammonia:  for refrigeration systems that operate with ammonia, you can upgrade the testo 316-4 leak detector (set 1) using the spare head for ammonia (NH3). Or you can purchase the testo 316-4 leak detector (set 2) specifically for ammonia 
 

General technical data
Operating humidity 20 to 80 %RH
Reaction time < 1 s
Dimensions 190 x 57 x 42 mm
Operating temperature -20 to +50 °C
Product colour Black
Length of gooseneck 370 mm
Start-up time <50 sec (0 ... +50 °C); <80 sec (-20 ... 0 °C)
Detectable R134a; R22; R404A; H₂ and all common refrigerants such as CFC, HCFC, HFC NH₃ (separate sensor head)
Sensitivity 3 g/a
Leakage alarm optical and audible alarm
Standards EN 14624:2012
Alarm function Optical; audible
Storage temperature -25 to +70 °C
Weight 348 g

Delivery Scope

testo 549 digital manifold including calibration protocol and batteries.

Entry Level Digital Manifold - testo 549
Model No: testo 549 Part No: 0560 0550

The testo 549 digital manifold aids in carrying out maintenance or installation work on refrigeration systems and heat pumps. With its integrated temperature measurement and automatic calculation of superheating/subcooling, you can now do away with additional measurements and manual comparisons (when using an optional clamp probe).

  1. Calculation of superheating/subcooling in real time with up to two external temperature probes
  2. 2-way valve block with three connections, three hose parkers and sight glass
  3. 60 common refrigerants stored in the instrument
  4. Display illumination for better legibility in dark surroundings
  5. 250 hours‘ battery life


When carrying out maintenance or installation work on refrigeration systems and heat pumps, are you increasingly noticing that the use of analog manifolds is laborious and time-consuming? If so, the testo 549, our entry-level digital manifold, is the perfect choice for you. This 2-way manifold can be used for 60 refrigerants and offers practical solutions for your everyday work:Two temperature-compensated pressure sensors  ensure fast, precise measurement of high and low pressure, and automatic calculation of the evaporating and condensing temperature.

Two connections for external temperature probes : with temperature probes attached (optional), the digital manifold can calculate superheating and subcooling simultaneously and in real time. This means you can do away with manual comparisons, which are prone to error, and obtain fast, accurate results, Leakage test of refrigeration systems:  the manifold can carry out a temperature-compensated leakage test of the system for rough tightness testing. For this, the initial system pressure is compared with the system pressure at the end of the measurement, so that the difference (if there is one) can be displayed immediately.Can be used for standard refrigerants:  the 60 most common refrigerants are stored in the instrument as standard 
 
You can also view the temperature difference via the 2-way manifold. The automatic heat pump mode, which makes switching over the refrigerant hoses unnecessary, is also really practical. 
 
Digital manifold: sturdy and practical  
 
The testo 549 digital manifold features a robust 2-way valve block made of metal with 3 connections and 3 hose holders, is easy to handle and can even withstand harsh environmental conditions. With its solid housing, the instrument is reliably protected against impacts in compliance with protection class IP 42. You can use the suspension hook to secure the manifold during the measuring process. Thanks to the illuminated display, you can read off the readings easily, even in dark environments.

Temperature
Measuring range -50 to +150 °C
Accuracy ±0.5 °C
Resolution 0.1 °C
Probe connection 2 x plug-in (NTC)
Pressure measurement
Measuring range -1 to +60 bar
Accuracy ±0.5 % fs
Resolution 0.01 bar
Probe connection 3 x 7/16" – UNF
Overload rel. (high pressure) 65 bar
Vacuum measurement
Measuring range -1 to 0 bar
General technical data
Weight 1060 g
Dimensions 200 x 109 x 63 mm
Operating temperature -20 to +50 °C
Protection class IP42
Storage temperature -20 to +60 °C

Delivery Scope

testo 552 digital vacuum gauge with Bluetooth®, two AA batteries.

Digital Vacuum Gauge - testo 552
Model No: testo 552 Part No: 0560 5522

Testo 552 is a high-precision digital vacuum gauge is ideal for evacuating refrigerant systems or heat pumps.

  1. Highly accurate and reliable measurement results
  2. Measurement data monitoring via testo Smart Probes App
  3. Measurement data dispatch via testo Smart Probes App
  4. Measurement of the evaporation temperature of H2O
  5. Optical alarm when a limit value is exceeded
  6. Extremely robust and water/dirt resistant (IP 42)


The testo 552 is a high-precision digital vacuum gauge designed to provide you with absolutely reliable readings. It has all the measuring functions you need for evacuating refrigerant systems and heat pumps and is built to last and tough enough to take the odd knock. 
 
Via a Bluetooth interface, the testo 552 connects with the testo Smart Probes App on your smartphone or tablet. This allows you to monitor the absolute pressure reached during the evacuation conveniently and wirelessly. In addition to this, the measurement results can be quickly documented in the App and sent by e-mail.
  
The testo 552 digital vacuum gauge – areas of application Evacuating is one of the most important steps when it comes to installing or restarting refrigerant or air conditioning systems: foreign gases, moisture and oils have to be removed properly. That’s when the absolute pressure of a system needs to be measured. 
 
And that’s exactly what the testo 552 digital vacuum gauge is designed to do: the meter provides you with highly accurate information regarding the dehumidification status of the system and is able to measure even the smallest of absolute pressures absolutely reliably. This means that you are always able to observe manufacturer specifications. A visual alarm warns immediately when a threshold has been exceeded. 
 
And because the digital vacuum gauge is IP42 rated (water resistant and dirt proof), it is virtually impervious to moisture and dirt. 

Absolute Pressure
Measuring range 0 to 26.66 mbar / 0 to 20000 micron
Accuracy ±(10 micron + 10 % of mv) (100 to 1000 micron)
Resolution 1 micron (0 to 1000 micron) / 10 micron (1000 to 2000 micron) / 100 micron (2000 to 5000 micron) /
Overload absolute: 6.0 bar / 87 psi (relative: 5.0 bar / 72 psi)
General technical data
Weight 500 g
Dimensions 160 x 110 x 50 mm
Operating temperature -10 to +50 °C
Protection class IP42
System requirements requires iOS 8.3 or newer; requires Android 4.3 or newer; requires mobile end device with Bluetooth 4.0
Product colour black/orange
Battery type 2 AA
Battery life 50 hrs (without Bluetooth/backlighting)
Connection 2 x 7/16“ UNF
Interface Bluetooth® 4.0 wireless technology
Parameter mbar; micron; mmHg; Torr; inHg; inH20; hPa; Pa
Measuring rate 0.5 s
Storage temperature -20 to +50 °C

Delivery Scope

testo 570-1 digital manifold, clamp temperature sensor, calibration protocol, batteries.

Refrigeration Manifold - testo 570-1
Model No: testo 570-1 Part No: 0563 5701

The testo 570-1 digital manifold is ideal for all measurement tasks on refrigeration systems and heat pumps like measuring, analyzing and logging– pressure, temperature, electricity and vacuum measurements.

  1. Calculate superheating and subcooling simultaneously
  2. Record pressure, temperature, current and vacuum measurement in one instrument
  3. 999 hours recording measurement values
  4. 40 refrigerants stored
  5. Report printout on site with Testo fast printer


For refrigeration systems and heat pumps to function smoothly and efficiently, the pressure, temperatures and any system superheating or subcooling need to be monitored. The testo 570-1 refrigeration manifold can record or calculate all these values and also enable temperature-compensated tightness testing. Which is why our 4-way refrigeration manifold supplies you with the key information that you need for the optimum commissioning and maintenance of refrigeration systems or for error diagnosis. Complex manual comparisons and calculations (e.g. of superheating and subcooling), which would be necessary when using analog manifolds, are not needed. 
 
Thanks to digital technology, several manual steps and calculations are no longer required  
 -  Record readings over a period of up to 999 hours:  the results are safely stored in the instrument, even for long-term measurements on refrigeration systems or heat          pumps 
 -  Real-time recording and graphic presentation of measurement data:  as an option you can purchase the “EasyKool” software, which can be used to clearly present the      measurement data. This is particularly useful for identifying sources of error in the event of a fault, and taking countermeasures if needed 
 -  Protocol access and printout:  the testo fast printer, which is available as an option, enables on-site printout of measurement data. You can also view the measurement      protocols in the “EasyKool” software (optional) 
 -  Suitable for all common refrigerants:  40 current refrigerants are stored in the manifold and can be updated if necessary using the optional “EasyKool” software 
 -  Pressure measurement with automatic temperature calculation:  high and low pressure is measured via two temperature-compensated pressure sensors, which                  automatically calculate the temperatures in addition 
 -  Three connections for external temperature probes:  connect up to three temperature probes (optional) in order to calculate superheating and subcooling in parallel and      record the ambient temperature (e.g. in cold storage rooms) 
 -  Integrated vacuum measurement:  when evacuating refrigeration systems, you can use the 4-way manifold to carry out vacuum measurements. The integrated vacuum      sensor enables precise vacuum measurements 
 -  Automatic heat pump mode:  saves you from having to change refrigerant hoses 
 -  Other features  such as temperature-compensated tightness testing and automatic ambient pressure compensation are included in the refrigeration manifold 

Together with the testo 570-1 refrigeration manifold, you also get a clamp temperature probe. Simply clamped to the pipe, this reliably measures the surface temperature. Our probes range also includes attachable probes for measuring temperature, current or oil pressure. 

Robust and convenient – the refrigeration manifold works like a pro  
The testo 570-1 refrigeration manifold is suitable for practical use, largely thanks to its robust 4-way valve block with 4 connections, 4 hose parkers and its inspection glass. Maintenance and servicing tasks on refrigeration systems and heat pumps are made easier due to the manageability of the instrument. 
With its solid housing, the refrigeration manifold is protected against impacts. A suspension hook on the back secures the instrument during the measurement. In addition, the manifold has a large, illuminated display, so you will have no problem reading off the readings, even in a dark environment. 
Recommendation: if you would like to have a key accessory to hand, you can purchase the refrigeration manifold testo 570-2 Set. This manifold set contains a second clamp temperature probe, the “EasyKool” software, a USB cable, a mains unit and a transport case.

Pressure measurement
Measuring range 50 bar
Accuracy ±0.5 % fs (±1 Digit)
Resolution 0.01 bar / 0.1 psi
Probe connection 3 x 7/16" – UNF + 1 x 5/8'' – UNF
Overload rel. (low pressure) 52 bar
Overload rel. (high pressure) 52 bar
Low pressure rel. 50 bar
High pressure rel. 50 bar
Vacuum measurement
Measuring range -1 to 0 bar
Accuracy 1 % fs
Resolution 1 hPa / 1 mbar / 500 micron
General technical data
Weight 1200 g
Dimensions 288 x 135 x 75 mm
Operating temperature -20 to +50 °C
Protection class IP42
Product colour grey
Battery life approx. 40 h (w/o illumination)
Display type LCD
Pressure media CFC; HFC; N; H₂O; CO₂
Refrigerants in instrument R12; R123; R1233zd; R1234yf; R134a; R22; R290; R401A; R401B; R402A; R402B; R404A; R407A; R407C; R408A; R409A; R410A; R414B; R416A; R420A; R421A; R421B; R422B; R422D; R424A; R427A; R434A; R437A; R438A; R448A; R449A; R450A; R452A; R455A; R502; R503; R507
Refrigerants update via software EasyKool; R11; FX80; I12A; R114; R1150; R1234ze; R124; R125; R1270; R13; R13B1; R14; R142B; R152A; R161; R170; R227; R23; R236fa; R245fa; R32; R401C; R406A; R407B; R407D; R407F; R407H; R41; Ra11A; R412A; R413A; R417A; R417B; R417C; R422A; R422C; R426A
Storage temperature -20 to +60 °C

Delivery Scope

testo 570-2 digital manifold, clamp temperature sensor,, “EasyKool” PC software (free download), USB cable, transport case, mains unit and calibration protocol, batteries.

Refrigeration Digital Manifold - testo 570-2
Model No: testo 570-2 Part No: 0563 5702

The testo 570-2 digital manifold is ideal for all measurement tasks on refrigeration systems and heat pumps like measuring, analyzing and logging– pressure, temperature, electricity and vacuum measurements and data recording.

  1. Calculate superheating and subcooling simultaneously
  2. Record pressure, temperature, current and vacuum measurement in one instrument
  3. 999 hours recording measurement values
  4. 40 refrigerants stored
  5. Report printout on site with Testo fast printer


The testo 570-2 digital manifold can replace a whole array of different tools and measuring instruments that you would otherwise need to carry around with when you work on refrigeration systems and heating pumps. The pressure gauge can measure, analyze and log pressure, temperature, electricity and vacuum measurements and save all measuring data right from the moment the unit was first used to servicing and maintenance to the fault analysis of a system. 
 
Modern-day technology that makes certain manual steps and calculations redundant  
-  The pressure gauge has 999 hours of internal memory: clearly-structured, easy-to-follow logging of measurements 
-  Real time data measurement and graphical editing: the "EasyKool" software in testo 570-2 digital manifold presents the data in an easy-to-understand format – this             allows faults to be detected far more quickly when breakdowns or failures occur 
-  Call up and print out protocols: this allows you to reproduce measurements more easily and to call up protocols – as well as print out the data with the optionally                 available testo fast printer 
-  The 40 most common type refrigerant agents are already stored in testo 570-2 digital manifold: updates for other refrigerant agents can be carried out free of charge           using the "EasyKool" software 
-  Two temperature compensated pressure sensors measure high and low pressure quickly and reliably and calculate the temperatures automatically 
-  Three temperature connecting points for connectable temperature sensors: calculate superheat and subcooling simultaneously, measure parallel the surrounding                temperature, for example in a cold storage room 
-  Integrated vacuum measurements: reliable measurements during the evacuation of refrigerant systems and heat pumps 
-  Automatic heat pump mode – no need to replace refrigerant hoses 
-  Further features like the temperature compensated leak-tightness check function and the automatic surrounding pressure compensation 
 
The scope of supply for the digital manifold includes a two clamp temperature sensor which can be clamped directly onto the pipe in order to ensure that the surface temperature can be measured safely. There is a wide selection of optionally available sensors for carrying out temperature, electricity and oil pressure measurements. 
 
Rugged and easy to use: the digital manifold is a truly professional piece of kit  
The testo 570-2 digital manifold is a compact, sturdy, easy-to-use pressure gauge with 4 connecting points, 4 hose brackets and an inspection glass. The testo 570-2 allows you carry out your work and service and maintenance tasks quickly, safely and efficiently.

The rugged housing protects the testo 570-2 digital manifold against impact while a suspension attachment ensures that the meter is safely positioned during measuring. A large, backlit display ensures that you can read the measurements even in the dark or in poor lighting.

Pressure measurement
Measuring range -1 to 60 bar
Accuracy ±0.5 % fs
Resolution 0.01 bar
Probe connection 3 x 7/16" – UNF
Overload rel. (high pressure) 65 bar
Vacuum measurement
Measuring range -1 to 0 bar
General technical data
Weight 1060 g
Dimensions 200 x 109 x 63 mm
Operating temperature -20 to +50 °C
Protection class IP42
System requirements requires iOS 7.1 or newer; requires Android 4.3 or newer; requires mobile end device with Bluetooth 4.0
Product colour Black
Battery life 250 h (without illumination, without Bluetooth®)
Refrigerants in instrument R114; R12; R123; R1233zd; R1234yf; R1234ze; R124; R125; R13; R134a; R22; R23; R290; R32; R401A; R401B; R402A; R402B; R404A; R407A; R407C; R407F; R407H; R408A; R409A; R410A; R414B; R416A; R420A; R421A; R421B; R422B; R422C; R422D; R424A; R427A; R434A; R
Refrigerants update via App R11; FX80; I12A; R1150; R1270; R13B1; R14; R142B; R152A; R161; R170; R227; R236fa; R245fa; R401C; R406A; R407B; R407D; R41; Ra11A; R412A; R413A; R417A; R417B; R417C; R422A; R426A; R508A; R508B; R600; RIS89; SP22
Storage temperature -20 to +60 °C

Delivery Scope

Are you interested in this measuring instrument? Testo has put together practical kits for you – so you’ll be optimally equipped to tackle your measuring tasks right away.

Smart digital manifold with Bluetooth and 2-way valve block - Testo 550s
Model No: Testo 550s Part No: 0564 5500

Testo 550s digital manifold with Bluetooth and a 2-way valve block features a large graphic display, a compact, robust housing, guided measurement menus and the testo Smart App. Top-quality measurement technology, a high degree of reliability and smart functions for quick, easy measurements and documentation make the testo 550s manifold a reliable partner for your commissioning, servicing and maintenance of refrigeration and air conditioning systems and heat pumps.

  1. All results at a glance thanks to the large graphic display
  2. Exceptionally compact and reliable thanks to the easy-to-handle, robust housing with IP 54 protection class
  3. Simple, wireless measurement of vacuum and temperature via automatic Bluetooth® connection
  4. Even greater flexibility for your measurements and documentation with the testo Smart App


Easier, more flexible measurements and documentation: With the testo 550s digital manifold with Bluetooth and 2-way valve block, you‘ll be ideally equipped for your measuring tasks in the field of commissioning, servicing and maintenance of refrigeration and air conditioning systems and heat pumps. 
 
Testo 550s – Smart digital manifold with Bluetooth and 2-way valve block :

  1. For exceptionally fast measurements on refrigeration and air conditioning systems and heat pumps
  2. Large graphic display for easy evaluation of measurement results
  3. Stored programs guide you through the measurement and make it possible to automatically determine key system parameters such as superheating, pressure drop test or evacuation
  4. Straightforward to handle, with maximum flexibility for your application: Bluetooth probes for temperature, pressure and humidity connect to the manifold automatically
  5. testo Smart App: Create digital documentation straight away on site, set your own favourites, always have the latest refrigerants thanks to automatic updates
  6. Continuously high performance in all conditions: You can depend on this manifold from Testo – it combines proven Testo quality with excellent robustness 
Temperature Measurement
Measuring range -50 to +150°C
Accuracy ±0.5 °C
Resolution 0.1 °C
Probe connection 2 x plug-in (NTC)
Pressure Measurement
Measuring range -1 to 60 bar
Accuracy ±0.5 % fs
Resolution 0.01 bar
Probe connection 3 x 7/16" – UNF
Overload rel. (high pressure) 65 bar
General technical data
Operating temperature -20 to +50 °C
Protection class IP54
System requirements requires iOS 11.0 or newer; requires Android 6.0 or newer; requires mobile end device with Bluetooth 4.0
Battery type 4 x type AA batteries
Battery life 250 h with no illumination, no Bluetooth®; 100 h with illumination and Bluetooth®
Data transfer Bluetooth®
Radio range 150 m
Refrigerants in instrument R407H; R23; R290; R1234yf; R442A; R134a; R123; R452B; R438A; R421A; R453a; R401B; R1233zd; R410A; R407A; R407C; R452A; R401A; R422C; R427A; R422B; R424A; R125; R414B; R404A; R408A; R448A; R422D; R12; R114; R421B; R449A; R409A; R420A; R444B; R32; R454A; R1
Refrigerants update via App R11; FX80; I12A; R1150; R1270; R13B1; R14; R142B; R152A; R161; R170; R227; R236fa; R245fa; R401C; R406A; R407B; R407D; R41; Ra11A; R412A; R413A; R417A; R417B; R417C; R422A; R426A; R508A; R508B; R600; RIS89; SP22
Storage temperature -20 to +60 °C

Delivery Scope

Testo 550i digital 2-way manifold including batteries (3 x AAA), calibration protocol and instruction manual.

App-controlled digital manifold with Bluetooth - Testo 550i
Model No: Testo 550i Part No: 0564 2550

Testo 550i app-controlled digital manifold with Bluetooth ®, 2-way valve block and sturdy hook offers extensive measurement technology in an exceptionally compact format. Use this extremely robust manifold to carry out your everyday work on refrigeration and air conditioning systems and heat pumps wirelessly, with ease and reliability. All using the testo Smart App on your smartphone or tablet.

  1. All activities, from measurement through to documentation, using the testo Smart App on your Smartphone
  2. The smallest digital manifold on the market
  3. Maximum reliability thanks to the extremely robust housing with IP54 protection class
  4. Optionally expandable with testo Smart Probes for temperature, humidity and vacuum


From the measurement itself through to the documentation – thanks to the app, you can have your everyday servicing and maintenance work on your smartphone or tablet. The testo 550i digital manifold is equipped with Bluetooth, 2-way valve block and a sturdy hook, and can be fully controlled via app and smartphone or tablet – for flexible, fast measurements and digital documentation.

Testo 550i – App-controlled digital manifold with Bluetooth and 2-way valve block

  1. For carrying out exceptionally fast, easy measurements on refrigeration and air conditioning systems and heat pumps
  2. testo Smart App: Control your servicing and maintenance tasks completely via app and smartphone or tablet, enjoy clearly presented results and digital documentation, set your own favourites, and always have the latest refrigerants
  3. Maximum reliability and convenient handling in environments that are difficult to access thanks to an exceptionally compact, extremely robust housing with IP54 protection class
  4. Maximum flexibility for working wirelessly: Bluetooth probes for temperature, pressure and humidity automatically connect to the measuring instrument via the testo Smart App
  5. Continuously high performance in all conditions: You can depend on this manifold from Testo – it combines proven Testo quality with excellent robustness
Pressure measurement
Measuring range -1 to 60 bar
Accuracy ±0.5 % fs
Resolution 0.01 bar
Probe connection 3 x 7/16" – UNF
Overload rel. (high pressure) 65 bar
General technical data
Operating temperature -10 to +50 °C
Protection class IP54
System requirements requires iOS 11.0 or newer; requires Android 6.0 or newer; requires mobile end device with Bluetooth 4.0
Battery type 3 AAA micro batteries
Battery life 130 h
Radio range 150 m
Refrigerants in instrument R407H; R23; R290; R1234yf; R442A; R134a; R123; R452B; R438A; R421A; R453a; R401B; R1233zd; R410A; R407A; R407C; R452A; R401A; R422C; R427A; R422B; R424A; R125; R414B; R404A; R408A; R448A; R422D; R12; R114; R421B; R449A; R409A; R420A; R444B; R32; R454A; R1
Refrigerants update via App R11; FX80; I12A; R1150; R1270; R13B1; R14; R142B; R152A; R161; R170; R227; R236fa; R245fa; R401C; R406A; R407B; R407D; R41; Ra11A; R412A; R413A; R417A; R417B; R417C; R422A; R426A; R508A; R508B; R600; RIS89; SP22
Storage temperature -20 to +60 °C

Delivery Scope

Are you interested in this measuring instrument? Testo has put together practical kits for you – so you’ll be optimally equipped to tackle your measuring tasks right away.

Smart digital manifold with Bluetooth and 4-way valve block - Testo 557s
Model No: Testo 557s Part No: 0564 5570

Testo 557s digital manifold with Bluetooth and a 4-way valve block features a large graphic display, a compact, robust housing, guided measurement menus and the testo Smart App. Top-quality measurement technology, a high degree of reliability and smart functions for quick, easy measurements and documentation make the testo 557s manifold a reliable partner for your commissioning, servicing and maintenance of refrigeration and air conditioning systems and heat pumps.

  1. All results at a glance thanks to the large graphic display
  2. Exceptionally compact and reliable thanks to the easy-to-handle, robust housing with IP 54 protection class
  3. Simple, wireless measurement of vacuum and temperature via automatic Bluetooth® connection
  4. Even greater flexibility for your measurements and documentation with the testo Smart App


Easier, more flexible measurements and documentation: With the testo 557s digital manifold with Bluetooth and 4-way valve block, you‘ll be ideally equipped for your measuring tasks in the field of commissioning, servicing and maintenance of refrigeration and air conditioning systems and heat pumps.

Testo 557s – Smart digital manifold with Bluetooth and 4-way valve block

  1. For exceptionally fast measurements on refrigeration and air conditioning systems and heat pumps
  2. Large graphic display for easy evaluation of measurement results
  3. Stored programs guide you through the measurement and make it possible to automatically determine key system parameters such as superheating, pressure drop test or evacuation
  4. Straightforward to handle, with maximum flexibility for your application: Bluetooth probes for temperature, pressure and humidity connect to the manifold automatically
  5. testo Smart App: Create digital documentation straight away on site, set your own favourites, always have the latest refrigerants thanks to automatic updates
  6. Continuously high performance in all conditions: You can depend on this manifold from Testo – it combines proven Testo quality with excellent robustness
Temperature Measurement
Measuring range -50 to +150 °C
Accuracy ±0.5 °C
Resolution 0.1 °C
Probe connection 2 x Plug-in (NTC)
Pressure measurement
Measuring range -1 to 60 bar
Accuracy ±0.5 % fs
Resolution 0.01 bar
Probe connection 3 x 7/16" – UNF + 1 x 5/8'' – UNF
Overload rel. (high pressure) 65 bar
General technical data
Operating temperature -20 to +50 °C
Protection class IP54
Battery type 4 x type AA batteries
Battery life 250 h with no illumination, no Bluetooth®h (without illumination, without Bluetooth®, without vacuum probe); 100 h with illumination and Bluetooth®
Radio range CFC
Refrigerants in instrument R1234yf; R744 (CO₂); R437A; R503; R452A; R500; R114; R444B; R407H; R422B; R434A; R410A; R290; R449A; R401B; R407F; R13; R123; R718 (H₂O); R404A; R125; R416A; R421B; R422C; R448A; R22; R407A; R409A; R12; R454B; R414B; R442A; R1233zd; R420A; R424A; R458A; R
System requirements requires iOS 7.1 or newer; requires Android 4.3 or newer; requires mobile end device with Bluetooth 4.0 requires iOS 11.0 or newer; requires Android 6.0 or newer; requires mobile end device with Bluetooth 4.0
Refrigerants update via App R11; FX80; I12A; R1150; R1270; R13B1; R14; R142B; R152A; R161; R170; R227; R236fa; R245fa; R401C; R406A; R407B; R407D; R41; Ra11A; R412A; R413A; R417A; R417B; R417C; R422A; R426A; R508A; R508B; R600; RIS89; SP22
Storage temperature -20 to +60 °C

Delivery Scope

App-controlled testo 552i wireless vacuum probe, including batteries and calibration protocol.

App-controlled wireless Vacuum probe - Testo 552i
Model No: Testo 552i Part No: 0564 2552

Testo 552i vacuum probe with Bluetooth to measure vacuum wirelessly with speed, ease and precision via just one service port – with no loss of refrigerant. The testo Smart App supports you with numerous intelligent features – for example, you can see the vacuum by simply glancing at the graphic illustration in the app or on the manifold’s display. Thanks to its robust, convenient housing and proven measuring technology, the vacuum probe is compact and reliable when carrying out your vacuum measurements on refrigeration and air conditioning systems and heat pumps.

  1. Identify vacuum quickly and easily by means of the graphical display in the App or on the digital manifold screen
  2. Connects automatically via Bluetooth® to the testo Smart App and digital manifolds
  3. Exceptionally compact and reliable thanks to the robust, easy-to-handle housing with IP 54 protection class
  4. Easy installation at any service port thanks to the integrated 45° angle


Wireless vacuum measurements via just one service port: The testo 552i app-controlled vacuum probe with Bluetooth enhances the Testo Smart Probes portfolio. It delivers reliable measurement results, is robust and easy to use – the vacuum probe provides optimum support for proper evacuation of refrigeration and air conditioning systems and heat pumps.

Testo 552i - App-controlled wireless vacuum probe

  1. For wireless, hose-free vacuum measurements on refrigeration and air conditioning systems and heat pumps using just only one service port – with no loss of refrigerant
  2. testo Smart App – get an overview of everything: Detect vacuum quickly and easily via a graphic illustration in the app, with an alert in the event of any critical values, e.g. through vibration of the smartphone
  3. Automatic connection via Bluetooth: The probe connects to the testo Smart App or to the appropriate digital manifold from Testo, e.g. testo 557s, testo 550s – so you can also read measured values conveniently on your manifold’s large display
  4. Convenient, robust housing with protection class IP 54
  5. Built-in 45° angle for easy installation at any service port
  6. Continuously high performance in all conditions: You can depend on this wireless vacuum probe from Testo – it combines proven Testo quality with excellent robustness
General technical data
Operating temperature -10 to +50 °C
Protection class IP54
System requirements requires iOS 8.3 or newer; requires Android 4.3 or newer; requires mobile end device with Bluetooth 4.0
Battery type 3 AAA micro batteries
Battery life 39 h
Connection 7/16“ UNF
Interface Bluetooth® 4.2
Storage temperature -20 to +50 °C
Absolute Pressure
Measuring range 0 to 26.66 mbar / 0 to 20000 micron
Accuracy ±10 micron + 10 % of mv (100 to 1000 micron)
Resolution 1 micron (0 to 1000 micron) / 10 micron (1000 to 2000 micron) / 100 micron (2000 to 5000 micron)
Overload absolute: 6.0 bar / 87 psi (relative: 5.0 bar / 72 psi)

Refrigeration systems, air conditioning systems, heat pumps

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