AMT Dewpoint Transmitter
The AMT dewpoint transmitter is a reliable solution for continuous trace moisture measurement in process gases or compressed air. For unmatched sensitivity, accuracy and speed of response, it features our ultra-high capacitance aluminium oxide sensing technology.
Compact, 2-wire, 4-20 mA loop-powered, offering continuous online trace moisture monitoring across various dewpoint ranges from -120 °C to +20 °C (-184 °F to +68 °F), accurate to ±2 °C (±3.6 °F) dewpoint.
Its advanced RISC microprocessor circuitry provides high resolution and sophisticated self-diagnostics. Equipped with our unique AutoCal span correction feature, the AMT dewpoint transmitter facilitates field calibrations and span checks. Thereby ensuring the best possible accuracy between laboratory calibrations. Its rugged stainless steel construction protects to IP66 / NEMA 4X, with the transmitter’s electrical connections made via a secure industrial connector.
Technical Data
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General
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Sensor/Transmitter Type
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2-Wire 4-20 mA Loop Powered Dewpoint Transmitter
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Documentation
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Instruction manual, calibration certificate
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Sensor
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Sensing Element
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Ultra-high capacitance aluminium oxide
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Dewpoint Range
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Overall range offered between -120 °C to +20 °C (-184 °F to +68 °F) dewpoint.
-120 °C to +20 °C (-184 °F to +68 °F)
-110 °C to -20 °C (-166 °F to -4 °F)
-100 °C to 0 °C (-148 °F to +32 °F)
-100 °C to +20 °C (-148 °F to +68 °F)
-80 °C to -20 °C (-112 °F to -4 °F)
-80 °C to 0 °C (-112 °F to +32 °F)
-65 °C to +20 °C (-85 °F to +68 °F)
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Calibration Warranty
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12 months from date of dispatch
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Automatic Calibration
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Span check and correction are performed using two buttons on the transmitter body.
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Factory Calibration
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Supplied with a calibration certificate traceable to National and International Humidity standards.
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Accuracy
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± 2 °C (±0.36 °F) dewpoint
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Temperature Coefficient
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Temperature compensated for operating range
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Resolution
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0.005 mA
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Repeatability
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Better than ±0.3 °C dewpoint
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Operating Temperature
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-20 °C to +60 °C
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Storage Temperature
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-20 °C to +70 °C
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Response Times
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Wet to dry: -20 °C to -60 °C - less than 120 secs
Dry to wet: -100 °C to -20 °C - less than 20 secs
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Sample Flow Rate
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Flow independent, ideally 2 - 5 L/m. Max: 20 L/min
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