Oxygen Detector-Transmitter E2638-O2

Evikon MCI
  • Stable long-life optical sensor
  • Range 0...25 %vol O2
  • Resoluton 0.01 %vol O2
  • 2 × 4-20 mA / 0-10 V, RS485
  • Relay or LCD indicator option
  • Attached or remote sensor options


Oxygen transmitter E2638-O2-L is a member of new PluraSens® family of multifunctional measurement instruments.

The instrument may be used to prevent critical decrease of O2 concentration as well as to control the absence of the oxygen in gas mixtures.

The instrument utilises novel fully calibrated and temperature compensated fluorescence-based gas sensor with excellent repeatability and stability and long lifetime. The sensor contains no hazardous materials. If used under moderate conditions without extreme fluctuations, it is maintenance free during the whole lifetime.

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 19,5% and 18,0% O2

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. 


Calibration Oxygen O2
Sensor type Electrochemical
Sampling Diffusion
Detection range 0...25 %vol O2
Resolution 0,01 %vol O2
Non-linearity < 0,2 %vol O2
Sensor lifetime > 2 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...+50 °C, 15...90% RH