Features

Stable long-life metal-oxide / pellistor sensor
Range 0...100% LEL CH4
Resolution 0,1 / 1 % LEL CH4
Two SPST relays option
2 × 4-20 mA or 0-10 V, RS485

Description

Methane detector-transmitter E2638-CH₄ is a member of new PluraSens® family of multifunctional measurement instruments.

Applications include underground parkings, boiler houses, kitchens, and other areas, where potentially explosive concentration of methane 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

Calibration	methane CH4
Sensor type	metal-oxide semiconductor (MOS)
	pellistor (catalytic bead) on demand
Sampling method	diffusion
Detection range	0...100% LEL CH4
Resolution	0,1 / 1 %LEL CH4
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)