Features
- Stable long-life metal-oxide sensor
- Ranges 0...1000 / 0...2500 ppm halocarbon gas
- Resolution 1 ppm halocarbon gas
- Two SPST relays option
- 2 × 4-20 mA or 0-10 V, RS485
Description
Refrigerant detector-transmitter E2638-HFC is a member of new PluraSens® family of multifunctional measurement instruments.
Applications include cold storage warehouses, refrigeration plants, skating arenas, hotels.
The instrument utilises a fully calibrated metal-oxide semiconductor gas sensor with excellent repeatability, stability and long lifetime. The sensor is highly sensitive to a wide range of CFC, HFC and HFO compounds, including R-12, R-123, R-125, R-134a, R-143, R-22, R-404a, R-407c, R-410a, R-507, R-514a, R-1233zd, R1234yf, R-1234ze and similar.
For demanding applications, a NDIR sensor is available on request.
Two relays with closing contact (optional) may be used for remote signalling or concentration control. Two alarm set-points are user settable.
Two analog outputs and RS485 digital interface with industry standard Modbus RTU protocol can be used to connect the detector to safety or building automation systems.
Technical Data
| Detected gases | R-12, R-123, R-125, R-134a, R-143, R-22, R-404a, R-407c, R-410a, R-507, R-514a, R-1233zd, R-1234yf, R-1234ze etc. |
| Default calibration | R-404a |
| Sensor type | metal-oxide semiconductor |
| optical NDIR on demand | |
| Sampling method | diffusion |
| Detection ranges | 0...1000 ppm halocarbon gas |
| 0...2500 ppm halocarbon gas | |
| Resolution | 1 ppm halocarbon gas |
| Sensor lifetime | >5 years |
| Power supply | 12...36 VDC (default), |
| 24 VAC or 230 VAC as options | |
| Digital interface | RS485, Modbus RTU protocol |
| Analog outputs | 2 × 4-20 mA / 0-10 V, user settable |
| Output relays (option) | 2 × SPST relays (closing contact), |
| 250 VAC / 30 VDC, 5 A max | |
| Alarm setpoints | minimum 250 ppm |
| Enclosure | grey ABS plastic, wall mount, IP65 |
| Dimensions | H90 × W145 × D55 mm |
| Operating conditions | -30...+60 °C, < 95 %RH |