Automation Components Inc (ACI) A/RH2-D Transmitter

The Automation Components Inc (ACI) A/RH2-D Transmitter is a precision duct relative humidity sensor engineered for high-performance HVAC and Building Automation Systems (BAS). This 2% accuracy humidity transmitter features a robust capacitive sensing element and a hydrophobic filter, ensuring long-term stability and resistance to dust, oils, and environmental chemicals. Designed for versatility, the A/RH2-D includes on-board DIP switches, allowing technicians to easily select between 4-20 mA, 0-5 VDC, or 0-10 VDC output signals. This field-selectable humidity sensor also supports both AC and DC power sources, providing maximum compatibility with existing controllers. With its integrated single-point field calibration capabilities via increment and decrement switches, you can maintain peak accuracy without replacing the sensing element. Whether monitoring indoor air quality in hospitals or managing humidity control in clean rooms, this secondary-market-leading ACI humidity transmitter delivers reliable analog data for critical environmental management in commercial offices, schools, and pharmaceutical facilities.

• High Accuracy Monitoring: Delivers +/- 2% accuracy across a 10% to 95% RH range for precise environmental control.
• Field-Selectable Outputs: Easily toggle between 4-20 mA, 0-5 VDC, and 0-10 VDC signals to match any building automation system.
• Durable Construction: Features a weatherproof Euro enclosure and conformally coated circuit boards for moisture resistance.
• Simplified Maintenance: On-board calibration switches allow for easy adjustment and 0%, 50%, and 100% test modes for rapid troubleshooting.
• Broad Application: Ideal for economizers, data centers, and industrial process control where stable RH measurement is critical.

• Can the A/RH2-D be used with both AC and DC power? Yes, the unit is designed to be powered by either 24 VAC or 24 VDC sources, providing flexibility during HVAC installation.
• How do I change the output signal in the field? The transmitter uses on-board DIP switches (typically switches 6, 7, and 8) to select the desired 4-20 mA or voltage output without special tools.
• Is the sensing element resistant to contaminants? Yes, the multilayer capacitive humidity sensor is protected by a sintered filter and hydrophobic layer to resist dust, dirt, and common chemicals.

Disclaimer: While we strive for 100% accuracy, product data and specifications are subject to change. Please contact our team to confirm compatibility or technical details before purchasing.