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Testo 6441 compressed air flow meter with integrated inflow/outflow section, diameter DN15 (½"), with analog, pulse and switching output

Compressed air flow meter (DN15) - testo 6441
Model No: testo 6441 Part No: 0555 6441

Measurement of normal volume flow in the measuring range 0.25 to 75 m3/hr (DN15), consumption quantity in m3; media temperature in °C

1. Highest flexibility thanks to different signal outputs:
    - Analog output 4 to 20 mA (4-wire)
    - Pulse output
    - 2 switch outputs (parameterizable: consumption or volume

2. Flow-dependent, opener, closer, hysteresis, window)

3. Built-in totalizer, even without additional analysis unit

4. Operating menu with LED display

Testo 6441 compressed air flow meter enables you to carry out accurate compressed air consumption measurements, consumption and leak monitoring and flow measurements in your compressed air system. The compressed air flow meter can also be used to carry out a peak load analysis in order to determine whether you are generating compressed air of sufficient capacity. Overall, these measures can help you find potential for savings or prevent unnecessary investment costs.

Overview of the technical advantages offered by the testo 6441 compressed air flow meter

The testo 6441 compressed air flow meter is also a transmitter, which converts the measured parameter into a standardized electrical signal. The transmitter can therefore be integrated into systems (e.g. compressed air systems), making it a key instrument in measuring and control technology. The testo 6441 compressed air flow meter also offers the following advantages:

-  Ultimate flexibility with a variety of signal outputs: analog output, pulse output, 2 switching outputs. You will therefore be equipped for any kind of application, whether that is consumption measurement, consumption or leak monitoring or even flow measurement
-  Integrated totalling function: the practical totaliser means that no additional analysis units are needed to calculate the total consumption
-  Ultimate accuracy: the precisely defined inner diameter (DN15) enables adjustment to standard volumetric flow, providing a high degree of measuring accuracy. This is an advantage compared with standard penetration probes, which calculate volume flow on the basis of measured flow and indicated pipe diameter – a procedure that is more vulnerable to error than measurement using the compressed air flow meter
-  Easy operation with a high degree of flexibility: parametrization of signal outputs, switching of physical units, signal delay, signal attenuation are all possible
-  Measurement according to the calorimetric principle: no pressure loss during measurement
-  Other advantages: no temperature compensation required, quick response time, robust sensor, optimized accuracy thanks to integrated inflow and outflow sections

Measurement parameters (Norm) volume flow
Selectable units m3/h, l/min, m3
Measuring range (1:300)1 0.25 to 75 m3/h
Accuracy (norm volume flow) For compressed air quality classes (ISO 8573: particles-humidity-oil) 1-4-1: ±3 % of meas. value ±0.3 % of final value For compressed air quality classes (ISO 8573: particles-humidity-oil) 3-4-4: ±6 % of meas. value ±0,6 % of final value
Sensor Thermal, glass-coated ceramic sensor (calorimetric measurement procedure)
Response time <0.1 sec (for damping parameter = 0), delayable via operating menu (0 to 1 sec)
Unit °C
Measuring range 0 to +60 °C / 32 °F to +140 °F
Inputs and outputs
Analog outputs
Output type 4 to 20 mA (4-wire) freely scalable between zero and measuring range end
Further outputs
Pulse output Consumption quantity counter (value remains available after reset or power cut due to non-volatile memory), value 1 or 10 m3, pulse length 0.02 s to 2 s, 24 VDC level
Switch output 2 switch outputs, parameterizable (consumption or volume flow-dependent, opener, closer, hysteresis, window), loadable with max. 20 to 30 VDC or 250 mA each, switch status is displayed via 2 LEDs
Voltage supply 19 to 30 V DC
Current consumption <100 mA
Connection M12 x 1 plug, loadable up to 250 mA, short-circuit-proof (synchronized), reverse-polarity-proof, overload-proof
General technical data
Material housing PBT (GF 20%), diecast zinc, silica-free
Pipe diameter DN 15 (for 1/2“ pipes)
Protection class IP65/III
Operating conditions
Humidity (sensor re. humidity <90 %RH
Operating temperature (housing) 0 to +60 °C (+32 to +140 °F)
Storage temperature -25 to +85 °C (-13 to +185 °F)
Measurement medium Measurement medium
Process pressure PN 16 (max 16bar/232psi)
Air quality ISO 8573: recommended classes 1-4-1
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