Automation Components Inc (ACI) A/RH3-AN-D Transmitter

The Automation Components Inc (ACI) A/RH3-AN-D Transmitter is a high-performance duct relative humidity sensor designed for precision monitoring in demanding HVAC/BAS environments. Featuring a capacitive sensing element with a multilayer construction and hydrophobic filter, this unit delivers a proportional analog output with ±3% accuracy. It is highly resistant to environmental contaminants such as dust, oils, and common chemicals, ensuring long-term reliability for critical applications. The A/RH3-AN-D includes integrated DIP switches for effortless field selection of 0-5 VDC, 0-10 VDC, or 4-20 mA signals. Additionally, it incorporates a 10,000 Ohm Type III thermistor for accurate resistive temperature output. Designed for maximum versatility, this humidity transmitter can be powered by both AC and DC sources and allows for single-point field calibration, eliminating the need for sensor replacement and minimizing system downtime in schools, hospitals, and data centers.

Key Benefits

• Selectable Output Signals: Integrated DIP switches allow users to choose between 4-20 mA, 0-5 VDC, or 0-10 VDC to match specific controller requirements.
• Integrated Temperature Sensing: Features a 10K Ohm Type III thermistor, providing both humidity and temperature data from a single duct-mounted device.
• Durable Construction: The thermoset polymer capacitive element is protected by a hydrophobic filter and a rugged Euro enclosure for superior moisture resistance.
• Simple Field Calibration: Onboard increment and decrement switches enable quick accuracy adjustments without removing the unit from the ductwork.
• Wide Power Compatibility: Supports a broad range of supply voltages, operating on either 24 VAC or 24 VDC systems.

Common Questions

Can the A/RH3-AN-D be used in high-dust environments?
Yes, the sensor is equipped with a hydrophobic filter and a multilayered sensing element designed to resist degradation from dust, dirt, and airborne chemicals.

What is the default factory output setting?
The unit is typically shipped with the 4-20 mA output signal as the factory default, but this can be easily changed via the internal DIP switches.

Does this sensor require a specific mounting orientation?
It should be mounted in the center of the duct for optimal airflow exposure, ensuring the probe tip reaches the middle of the airstream for the most accurate readings.

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.

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