Features
- Stable long-life electrochemical sensor
- Range 0...20 or 0...200 ppm NO2
- Resolution 0,1 ppm or 1 ppm NO2
- Two SPST relays option
- 2 × 4-20 mA or 0-10 V, RS485
Description
Nitrogen dioxide detector-transmitter E2638-NO2 is a member of new PluraSens® family of multifunctional measurement instruments.
Applications include underground parkings, boiler houses, kitchens, and other areas, where potentially toxic concentration of nitrogen 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 | nitrogen dioxide NO2 |
| Sensor type | electrochemical |
| Sampling method | diffusion |
| Detection range | 0...20 ppm NO2 |
| 0...200 ppm NO2 | |
| Resolution | 0,1 ppm NO2 for 20 ppm range |
| 1 ppm NO2 for 200 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 | |
| Default alarm set-points | 3 ppm / 6 ppm NO2 |
| Enclosure | grey ABS plastic, wall mount, IP65 |
| Dimensions | H90 × W145 × D55 mm |
| Operating conditions | -20...+50 °C, 15...90 %RH |
