Features
- 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
Description
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 |