Automation Components Inc (ACI) A/RH2-CP-O Transmitter

The Automation Components Inc (ACI) A/RH2-CP-O is a high-precision outside air humidity transmitter designed for demanding HVAC and building automation systems (BAS). Featuring 2% accuracy, this relative humidity sensor utilizes a robust capacitive sensing element with a factory-applied hygroscopic filter to ensure long-term stability and resistance to dust and chemicals. The A/RH2-CP-O (also identified as ACI-RH-2-CP-0) is equipped with a 10,000 Ohm Type II thermistor, providing a resistive temperature output alongside humidity data. Integrated on-board DIP switches allow for seamless field selection of analog output signals, including 4-20 mA, 0-5 VDC, and 0-10 VDC. Designed for versatile installation, the unit supports both AC and DC power sources and features a NEMA 4X rated enclosure to protect internal components from harsh outdoor elements. Performance is further optimized through single-point field calibration, allowing technicians to maintain peak accuracy without replacing the sensor element, making it an essential component for economizer control and enthalpy calculations.

Key Benefits

• Field-Selectable Outputs: Quickly configure for 4-20 mA, 0-5 VDC, or 0-10 VDC using integrated DIP switches for maximum system compatibility.
• Enhanced Environmental Protection: The NEMA 4X weatherproof enclosure and conformally coated circuit boards resist moisture, corrosion, and contaminants.
• Simplified Maintenance: Perform single-point field calibration and utilize 0%, 50%, and 100% test options to verify wiring and sensor functionality.
• High Precision Monitoring: Delivers ±2% accuracy across a 10% to 95% RH range, ensuring reliable performance in critical psychrometric applications.
• Integrated Temperature Sensing: Features a 10K Ohm Type II thermistor to provide accurate temperature data for comprehensive environmental control.

Common Questions

What is the difference between the A/RH2-CP-O and ACI-RH-2-CP-0?
These two part numbers refer to the exact same technical specification and product from Automation Components Inc.

Can this sensor be powered by an AC source?
Yes, the transmitter is designed to be powered by either 12-40 VDC or 18-28 VAC, providing flexibility for various control panel configurations.

Is the sensor element replaceable in the field?
No, the sensing element is not designed for replacement; however, the unit features increment and decrement DIP switches that allow for easy field calibration adjustments.

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.