AMT-Ex Intrinsically Safe 4-20mA Transmitter
- 3 Wire Intrinsically Safe Dewpoint Transmitter
- Ex II 1GD Ex ia IIC T4 Ex iaD 20 T135°C (-20°C ≤ Ta ≤ +60°C)
- Overall Range: -120°C to +20°C Dewpoint
- Accuracy ± 2°C Dewpoint
- AUTOMATIC CALIBRATION
- Can be configured for Linear 4-20mA signal in: °C & °F Dewpoint, ppm(v), g/m3, lb/MMSCF
- Temperature Compensation
- Failure Diagnostics
- Long Term Stability
- Fast Response
- IP66 / NEMA4X Protection
Model AMT-Ex Dewpoint Hygrometeris a three wire 4-20mA transmitter, used for continuous measurement of humidity in a process gas or compressed air, which will output a linear 4-20mA signal corresponding to the dewpoint temperature. The Model AMT-Ex transmitter can also be factory configured to output a 4-20mA linear signal for any other moisture unit e.g. ppm(v), ppm(w), g/m3, lb/MMSCF etc.
The long lasting sensing element offers excellent sensitivity, repeatability and response speed. Each unit is supplied with a Certificate of Calibration, traceable to International Humidity Standards, validating accuracy to ±2ºC dewpoint.
Model AMT-Ex is ATEX certified and provides an Intrinsically Safe Dewpoint Transmitter for hazardous area use when installed with the appropriate isolator.
The transmitter also incorporates an Automatic Calibration (AUTOCAL) feature, which allows the user to carry out a field calibration / span check. AUTOCAL feature is operated by means of two small button switches built within the transmitter enclosure. To avoid tamper, the switches are locked in normal use and can only be activated by following a special routine.
The integral RISC microprocessor circuitry of the Model AMT-Ex transmitter allows high resolution with advanced self-diagnostics for fault conditions. It also enables periodic re-calibration of the moisture sensor, storing calibration data within the fully self-contained unit.
The mechanics of the Model AMT-Ex transmitter have been designed to cope with extreme environmental conditions. The rugged stainless steel construction offers protection to IP66 (NEMA4X), with transmitter electrical connections made via secure industrial connector.
Model AMT-Ex transmitter can withstand 35,000 kPa (350bar) maximum pressure and by employing a low resistance cable, the transmitter can be located significant distances, in excess of 1000 metres, from the safe area.
Designed with the operator in mind, for reliable and accurate measurements, Model AMT-Ex is extremely easy to install and operate, requiring little or no maintenance.
The Model AMT-Ex transmitter is supplied with a Certificate of Calibration, an instruction manual and 2m connecting cable.
(For full details please request specification sheetModel AMT-Ex)