Liquid Level Switches
Delivery Scope
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Trumen LFV Vibrating Fork Level liquid level switch used in all liquids, It detects the point level switching measurements reliably. for all liquids, independent level switch and it detects. LFV level switch is used as protection device of Hi and Low level switching in liquid applications. This level switch can be used as empty or full detection, dry run and pump protection in tanks and pipelines. This device can also be used in hazardous areas, chemical and food industry.
Features :
- Fast Switching Response 1 sec
- Calibration-less operation
- External indication LED available
- NAMUR (L-H / H-L) as per IEC-60947-5-6
- Ingress protection : IP 68/65 (as per IS-13947), Ex-proof (Ex d T6 IP-66 IIC), Flameproof as per IS/IEC 60079-1:2007, Weatherproof (IP-66) as per IS/IEC 60529:2001, Suitable for Gas Group : IIC, Suitable for Zone 1 & 2 atmospheres
- Compact size
- Vibration complied as per IEC 60068 part 2-6
- Low power consumption
Working Principle
Electronics of LFV excites the piezo-electric-crystals inside the tuning fork, which makes the fork tines vibrate at their natural resonance frequency in free air.
When fork tines are immersed in liquid, the frequency of fork vibration falls due to the density of liquid.
This change in frequency is detected by the electronic circuit. Liquid presence is thus detected.
This change in frequency is detected by the electronic circuit. Liquid presence is thus detected.
| Order Code | |
|---|---|
| LFV | Vibrating Fork Level Switch for Liquids |
| Hxx | Enclosure: HAN: Aluminum Non-Hazardous IP-66/68, HAX: Aluminum Flameproof IIa, IIb and IIc, HSN: Stainless steel, HPN: Polycarbonate (Plastic), HES: Specially designed as per customer requirement |
| Tx | Material Temperature (T1: max 80°C, T2: max 200°C, TS: Customer specified - Special designed) |
| Sx | Sensing Surface Material (S6:SS-316, SL, SS-316L, ST: PTFE coated, SF: PFA coated, SZ: TEFZEL, SH: HALAR coated, SS: Special surface) |
| Gx | Sensor Extension Material (G4: SS-304, G6: SS-316, GL: SS-316-L, GT: PTFE coated, GF: PFA coated, GZ: TEFZEL coated, GH: HALAR coated, GS: Special surface) |
| Px | Process Connection Type (PFL: Flanged Type – description of flange - FL -at the end of order code) (PB1: BSP 1", PB2: BSP 1½", PB3: BSP ¾", PB4: BSP 1¼", PB5: BSP ½", PB6: BSP 2") (PN1: NPT 1", PN2: NPT 1½", PN3: NPT ¾", PN4: NPT 1¼", PN5: NPT ½", PN6: NP |
| Cx | Process Connection Material: (C4: SS-304, C6:SS-316, CL: SS-316L, CT: PTFE coated, CF: PFA Coated, CS: Special Material) |
| EIUD | Integral Electronics with Universal supply (15-80V DC & 15-260V AC) & 1 DPDT potential-free relay output |
| EIDP | Integral Electronics with DC power supply (12-80V DC ) & one short circuit safe PNP output |
| EINL | Integral Electronics for NAMUR with L-H edge output |
| EIUSP | Integral Electronics with Universal supply and 1 SPDT relay and one PNP output with DC supply |
| EIAR | Integral Electronics with Two wire AC supply for external series relay (>5mA holding current) |
| EIDL | Integral Electronics with Two wire DC supply with 8/16mA current output suitable for 4-20mA analog inputs |
| EINH | Integral Electronics for NAMUR with H-L edge output |
| EIFS | Integral Electronics Specially designed with special output |
| ERUD | Integral Electronics with Universal supply (15-80V DC & 15-260V AC) & 1 DPDT potential-free relay output with 10 meter special interconnection cable |
| ERFS | Specially Designed Remote Electronics |
| Lxxxx | Insertion length (50mm to 3000mm) |
| FLxx | Flange type and bore size specified for ASA/ANSI/JIS/DIN/Custom |
- Free flowing liquids, Flow/no-flow detection in pipe-lines
- Breweries, Dairies, Chemicals and Fertilisers, Cement, Pharmaceuticals, Packaging Indutries, etc.