Sulfur Dioxide Detector
  • Stable long-life electrochemical sensor
  • Range 0...50 or 0...2000 ppm SO2
  • Resolution 0,1 ppm or 1 ppm SO2
  • Two SPST relays option
  • 2 × 4-20 mA or 0-10 V, RS485

Sulfur dioxide detector-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 stations, laboratories and other areas, where potentially toxic concentration of sulfur dioxide can accumulate.

The instrument utilises a fully calibrated and temperature compensated electrochemical gas sensor 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 sulfur dioxide SO2
Sensor type electrochemical
Sampling method diffusion
Detection range 0...50 ppm SO2
0...2000 ppm SO2
Resolution 0,1 ppm SO2 for 50 ppm range
1 ppm SO2 for 2000 ppm range
Sensor lifetime > 2 years
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
Enclosure grey ABS plastic, wall mount, IP65
Dimensions H90× W145 × D55 mm
Operating conditions -30...+50 °C, 15...90 %RH