- Certified Intrinsically Safe to IECEx, ATEX for use in hazardous areas and with potentially explosive atmospheres using a specified Signal Isolator in the safe area
- Ultra-high capacitance aluminium oxide sensor delivers unsurpassed sensitivity, speed of response, accuracy, repeatability, stability, and long service life
- Unique AutoCal span correction feature
- Various dewpoint ranges available from -110 °C to 20 °C
- Compact 3-Wire 4-20 mA Intrinsically Safe Dewpoint Transmitter
- Accuracy ±2 °C dewpoint
- IP66 / NEMA 4 Weatherproof Protection
- Optional Sensor Holder/Sample Cell for optimum sampling conditions
- Supplied with a calibration certificate traceable to National and International Humidity standards
Model AMT-Ex Dewpoint Transmitter is a 3-wire 4-20 mA powered transmitter that continuously measures moisture in process gas or compressed air. The 4-20 mA linear output signal can be factory configured for any of the following moisture units:- °C or °F dewpoint, ppm(v), ppb(v), g/m3, and lb/MMSCF.
Model AMT-Ex is certified Intrinsically safe to IECEx, and ATEX for use in hazardous areas and with potentially explosive atmospheres using the specified Signal Isolator in the safe area.
At the heart of the AMT-Ex Dewpoint Transmitter is our ultra-high capacitance aluminium oxide sensor, which delivers unsurpassed sensitivity, speed of response, accuracy, repeatability, stability, and long service life. Every unit is supplied with a Calibration Certificate traceable to International Humidity Standards, guaranteeing accuracy to ± 2 ºC dew point.
| Transmitter Type | 3-Wire 4-20 mA Intrinsically Safe Dewpoint Transmitter |
| Sensing Element | Ultra-High Capacitance – Aluminium Oxide Type |
| Output Signal | Linear 4-20 mA with selectable engineering units and fault indication |
| Power Supply | 12-28 Vdc Reverse Polarity Protected |
| Dewpoint Ranges | See datasheet |
| Intrinsic Safety Certification | IECEx BAS07.0080 BASEEFA 07ATEX0234 BAS21UKEX0805 |
| Standards | EN 60079-0:2018 EN 60079-11:2012 |
| ATEX, UKCA and IECEx Markings | Ex II 1GD Ex ia IIC T4Ga Exia IIIC T200 135 °CDA (-20 °C ≤ Ta ≤ +60 °C) |
| Electromagnetic Compatibility (EMC) | Complies with BS EN IEC 61326-1 |
| Accuracy | ± 2 °C dewpoint (UK National Physical Laboratory traceable for range -90 °C to 20 °C) |
| Repeatability | Better than ±0.3 °C dewpoint |
| Operating Temperature (Ambient and Process) | -20 °C to 60 °C |
| Operating Pressure (Process) | From 1 kPa (0.01 bara) to Maximum 35,000 kPa (350 bara) |
| Operating Humidity (Ambient) | Maximum 95 %RH Non-condensing |
| Storage Temperature | -20 °C to 70 °C |
| Field Calibration | AutoCal span check and correction are performed using two buttons on the Transmitter body. Locked in normal operating mode to avoid tamper. We recommend AutoCal is repeated every 2-3 months |
| Factory Calibration | Supplied with a calibration certificate traceable to National and International Humidity standards. We recommend annual laboratory calibration |
| Sample Flow Rate | Flow independent, ideally 5 to 15 L/min, maximum 20 L/min |
| Cable Terminations | IP66 / NEMA 4X rated, size C, DIN EN 175301 connector at the Transmitter and other end terminated with bootlace ferrules |
| Cable | Supplied with 2 m IS (blue) standard cable. Nominal diameter 3.4 mm, 92 ohms/km at 20°C |
| Mechanical Connection | 3/4” UNF (16tpi) with integral Viton “O” ring seal |
| Isolation | Sensing Element connected to the 4-20 mA loop but isolated from Transmitter body |
| Transmitter Body | 316 Stainless Steel |
| Sensor Protection | 316 Sintered Stainless Steel Filter – 50 micron |
| Probe Material (Wetted Parts) | 316 Stainless Steel |
| Ingress Protection | IP66 / NEMA 4X when Connector coupled to Transmitter |
| Manufacturer’s Warranty | 12 months in case of defective parts or faulty workmanship |
- Calibration Certificate traceable to National and International Humidity standards
- 2 m Connecting Cable
Related Products
DS4000 Dewpoint Hygrometer
- User-configurable display of dewpoint in °C or °F dewpoint, ppm(V), ppb(V), ppm(W), g/m³ or lb/MMSCF, factory pre-configured to customer order
- Linear 0-20/4-20 mA isolated retransmission signal
- User input of pressure for pressure dewpoint conversion
- Natural Gas data built-in
Exd Options
- GUBH Flameproof Enclosure (type “d”) Ex II 2 G D
- Designed for installation in Ex Hazardous areas Zone 1, 21, 2 and 22. Flameproof to ATEX and IECEx certification for use in potentially explosive atmospheres
- Offered with either DS4000 or DS1200 Indicators and AMT-Ex Intrinsically Safe Dewpoint Transmitter
Custom Sampling Systems
- Ensures gas sample is presented in optimum condition for measurement
- Custom designed systems for a wide range of process gases, Natural Gas, and Dry Compressed Air
- From simple systems to complex installations, designed and manufactured to suit your application
- Exd and Intrinsically Safe systems available
