Features
- Stable long-life metal-oxide / pellistor sensor
- Range 0...100% LEL
- Resolution 0,1 / 1 % LEL
- Two SPST relays option
- 2 × 4-20 mA or 0-10 V, RS485
Description
Combustible gas detector-transmitter E2638-LEL is a member of new PluraSens® family of multifunctional measurement instruments. The device exhibits sensitivity to hydrogen, methane, acetylene, propane and butane.
Applications include underground parkings, boiler houses, battery charging rooms, kitchens, and other confined spaces, where potentially explosive concentration of combustible gases can accumulate.
The instrument utilises fully calibrated metal-oxide semiconductor or pellistor gas sensors with excellent repeatability, stability and long lifetime.
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 | hydrogen, methane, acetylene, propane, butane |
| Default calibration | methane CH4 |
| Sensor type | metal-oxide semiconductor (MOS) |
| pellistor (catalytic bead) on demand | |
| Sampling method | diffusion |
| Detection range | 0...100% LEL |
| Resolution | 0,1 / 1 % LEL |
| Sensor lifetime | > 5 years (MOS) |
| > 3 years (pellistor) | |
| 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 | |
| Default alarm set-points | 20% LEL / 50% LEL CH4 |
| Enclosure | grey ABS plastic, wall mount, IP65 |
| Dimensions | H90 × W145 × D55 mm |
| Operating conditions | -40...+70 °C, 15...95 %RH (MOS) |
| -10...+50 °C, 0...95 %RH (pellistor) |