Solvent Vapors Detector-Transmitter E2638-VOC

Evikon MCI
  • Long-life metal-oxide gas sensor
  • Range 0...100% LEL or 0...100 to 0...1000 ppm
  • Resolution 0.1% LEL or 1 ppm
  • 2 × 4-20 mA / 0-10 V, RS485
  • Relay or LCD indicator option
  • Attached or remote sensor options


Volatile Organic Compounds transmitter E2638-VOC is a member of new PluraSens® family of multifunctional measurement instruments which is intended for detection of various solvent vapors, e.g. toluene, xylene, ethanol.

Applications include storages, painting chambers and other areas, where toxic or potentially explosive concentration of volatile organic compounds can accumulate.

The instrument utilises novel fully calibrated and temperature compensated metal-oxide gas sensor with excellent repeatability, stability and long lifetime.

According to user's preferences the detection range may be set to either 0...100% LEL (for fire prevention) or to toxicity range from 0...100 ppm to 0...1000 ppm of target gas.

To connect the detector to safety or building automation systems use two analog outputs and RS485 digital interface with industry standard Modbus RTU protocol. We recommend to set the output scale within 20-100% of the detection range.

Two relays with closing contact (option) may be used for remote signalling or ventilation control. Default alarm set-points are typically at 20% LEL and at 50% LEL for 0...100% LEL range and at 100 ppm and 300 ppm for 0...500 ppm range.

The device is available with either attached or remote sensor probe (default cable length is 3 m).

A version with an LCD indicator is available. 


Detected vapors Acetone, Ethanol, Toluene, Xylenes etc
Defautt calibration Toluene
Sensor type metal-oxide semiconductor (MOS)
Sampling method Diffusion
Detection range 0...100% LEL
or 0...100 to 0...1000 ppm
Resolution 0.1% LEL or 1 ppm
Sensor lifetime > 5 years
Power supply 11...30 VDC / 24 VAC
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
Enclosure Light grey ABS plastic, wall mount, IP65
Dimensions H90 × W145 × D55 mm
Operating conditions -30...+70 °C, < 95% RH