Aluminum oxide sensor dew-point transmitter AMT

4-20 mARS-4852-wire

Product overview
The AMT dewpoint transmitter is a compact, loop-powered instrument for continuous trace moisture measurement in process gases and compressed air. It uses ultra-high capacitance aluminium oxide sensing technology for high sensitivity, fast response and stable long-term performance. The transmitter integrates RISC microprocessor control, self-diagnostics and AutoCal span correction to simplify field calibration and verification.

Key features

• Ultra-high capacitance aluminium oxide sensor for superior sensitivity, accuracy and repeatability
• Factory-configurable outputs: °C/°F dewpoint, ppm(V), ppb(V), g/m³, lb/MMSCF
• Rugged stainless steel enclosure with IP66 / NEMA 4X protection; pressure rated to 35,000 kPa (350 bar)
• Compact 2-wire 4-20 mA loop-powered design for continuous online monitoring
• Low maintenance design with easy installation and optional sensor holder/sample cell for simplified removal and calibration
• Supplied with calibration certificate traceable to National and International Humidity Standards at NPL
• Transmitter can be installed up to 1,000 metres from compatible displays (DS1200, DS4000, DS1500)

Modbus RTU features

• Optional Modbus RTU over RS485 for digital connectivity with PLC and SCADA systems
• Unique TAG IDs for straightforward device identification and asset management
• Remote access to calibration, sensor and software parameters for proactive maintenance
• Daisy-chain installation via RS485 bus supports multi-transmitter networks

Technical specifications

• Model: AMT
• Measurement range: dewpoint from -120 °C to +20 °C (-184 °F to +68 °F)
• Accuracy: ±2 °C (±3.6 °F) dewpoint
• Output: 2-wire 4-20 mA loop-powered (optionally Modbus RTU over RS485)
• Sensing technology: ultra-high capacitance aluminium oxide sensor
• Processor & features: RISC microprocessor, high resolution, self-diagnostics, AutoCal span correction
• Construction: stainless steel enclosure
• Ingress protection: IP66 / NEMA 4X
• Maximum pressure rating: 35,000 kPa (350 bar)
• Electrical connection: secure industrial connector
• Optional accessories: sensor holder / sample cell for improved sampling and easy sensor removal
• Calibration: supplied with certificate traceable to National and International Humidity Standards at NPL
• Compatibility: compatible with DS1200, DS4000 and DS1500 displays; transmitter may be sited up to 1,000 metres from a display
• Typical applications: continuous trace moisture monitoring in process systems and compressed air