Sulfur Dioxide Detector-Transmitter E2638-SO2

Evikon MCI
  • Stable long-life electrochemical gas sensor
  • Typical detection range 0...20 ppm SO2
  • Resolution 0.1 ppm SO2
  • 2 × 4-20 mA / 0-10 V, RS485
  • Relay or LCD indicator option
  • Attached or remote sensor options


Sulfur dioxide transmitter E2638-SO2 is a member of new PluraSens® family of multifunctional measurement instruments.

Applications include wine-making, food and beverage industry, paper mills, wastewater treatment stationsб laboratories and other areas, where potentially toxic concentration of sulfur dioxide can accumulate.

The instrument utilises novel fully calibrated and temperature compensated electrochemical gas sensor with excellent repeatability, stability and long 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 2 ppm and 5 ppm SO2

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 Sulfur Dioxide SO2
Sensor type electrochemical
Sampling diffusion
Typical detection range 0...20 ppm
Resolution 0,1 ppm
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