E2638-LEL

Combustible Gas Detector
E2638-LEL
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
Accuracy ± 2% 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)


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