Now available with Modbus capability

The AcuDew Modbus RTU dewpoint transmitter delivers noise-resistant measurement and seamless multi-sensor integration. It combines high accuracy with reliable, standards-based communications, making it ideal for advanced monitoring applications. The SHAW AcuDew is now offered with Modbus RTU over RS485, adding a host of features and benefits.

Reliable and accurate
Digital Modbus RTU (RS485) ensures robust, accurate data transfer even in electrically noisy environments.

Customisable integration
A user-defined TAG ID can be stored within the transmitter for clear identification and smoother integration on process sites.

Improved communication
Enhanced diagnostics and clearer fault reporting support faster troubleshooting.

Centralised data
Units are factory configured to your preferred output: °C or °F dewpoint, ppm(v), ppb(v), g/m³ or lb/MMSCF. Data can be transmitted directly to your SCADA or PLC.

Expanded information access
Retrieve additional service data including calibration date, sensor range and software version.

Operational efficiency
Support proactive maintenance with better oversight of process measurements.

Multi-sensor management
Daisy-chain multiple transmitters on a single EIA-485 bus for efficient cabling and streamlined installation.

AcuDew — the same trusted transmitter with added Modbus benefits:

• 2-wire, 24 V, 4–20 mA analogue dewpoint transmitter

• 4-wire configuration for Modbus

• SHAW ultra-high-capacitance aluminium oxide sensing technology

• Accuracy: ±2 °C (±3.6 °F) dewpoint

• AutoCal function

• Ranges available across −120 °C to +20 °C (−148 °F to +68 °F) dewpoint

• Factory-set outputs: °C/°F dewpoint, ppm(v), ppb(v), g/m³, lb/MMSCF

• Modbus RTU Serial Line RS485

• TAG ID storage for easy identification

• Clear fault condition reporting

• Direct SCADA/PLC transmission

• Access to service information

• Multi-sensor daisy-chaining

• Open/short-circuit detection

• CE and UKCA approved