Features
- Stable long-life electrochemical sensor
- Range 0...100 / 0...300 / 0...1000 / 0...5 000 ppm NH3
- Resolution 1 ppm NH3
- Two SPST relays option
- 2 × 4-20 mA or 0-10 V, RS485
Description
Ammonia detector-transmitter E2638-NH3-E is a member of new PluraSens® family of multifunctional measurement instruments.
The instrument is intended for leakage control in refrigeration facilities, warehouses etc. It is not recommended to use the detector in spaces with constantly high ammonia concentration such as cattle, pig and poultry livestock houses, since it shortens the sensor lifetime.
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 | ammonia NH3 |
| Sensor type | electrochemical |
| Sampling method | diffusion |
| Detection range | 0...100 ppm NH3 |
| 0...300 ppm NH3 | |
| 0...1000 ppm NH3 | |
| 0...5 000 ppm NH3 | |
| up to 10000 ppm on request | |
| Resolution | 1 ppm NH3 |
| Repeatability | ± 10% |
| 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 | 25 ppm / 35 ppm NH3 |
| Enclosure | grey ABS plastic, wall mount, IP65 |
| Dimensions | H90 × W145 × D55 mm |
| Operating conditions | -40...+50 °C, -30...+50°C (for 0...5 000 ppm), |
| 15...90 %RH |