Automation Components Inc (ACI) 122687 Transmitter

The Automation Components Inc. (ACI) 122687, model A/RH2-D, is a duct-mounted relative humidity transmitter designed for commercial HVAC monitoring and building automation applications. Featuring ±2% RH accuracy, this transmitter measures relative humidity in ductwork and provides an analog signal to compatible HVAC controllers and building automation systems (BAS).

The ACI 122687 humidity sensor supports selectable 0–5 VDC, 0–10 VDC, and 4–20 mA outputs, with 4–20 mA as the default configuration. These industry-standard signals allow integration with compatible direct digital control (DDC) systems for humidity monitoring and ventilation management.

Housed in a Euro-style enclosure, this duct-mounted humidity transmitter is intended for installation in HVAC air distribution systems where accurate humidity measurements are required.

Before installation, verify the controller's analog input requirements, transmitter power supply, wiring configuration, output selection, and mounting compatibility.

Key Benefits

• Manufacturer: Automation Components Inc. (ACI)

• Part Number: 122687

• Model: A/RH2-D

• Product Type: Duct-Mounted Relative Humidity Transmitter

• Humidity Accuracy: ±2% RH

• Output Signals: Selectable 0–5 VDC, 0–10 VDC, or 4–20 mA

• Default Output: 4–20 mA

• Enclosure: Euro-Style Duct Enclosure

• Designed for commercial HVAC humidity monitoring.

• Provides humidity feedback to compatible building automation systems.

• Supports integration with DDC controllers and HVAC control equipment.

• Suitable for duct-mounted sensing applications.

Common Questions

Q: What is the ACI 122687 used for?

A: The ACI 122687 is a duct-mounted relative humidity transmitter used to measure humidity levels in HVAC ductwork and send an analog signal to compatible building automation controllers.

Q: What is the humidity accuracy of the ACI 122687?

A: The ACI A/RH2-D humidity transmitter provides ±2% RH accuracy.

Q: What output signals does the ACI 122687 support?

A: It supports selectable 0–5 VDC, 0–10 VDC, and 4–20 mA analog outputs. The default configuration is 4–20 mA.

Q: Can the ACI 122687 connect to a building automation system?

A: Yes. It can be integrated with compatible building automation systems and DDC controllers that accept the transmitter's configured analog output.

Q: What is the difference between 0–5 VDC, 0–10 VDC, and 4–20 mA outputs?

A: The 0–5 VDC and 0–10 VDC outputs transmit measurements using variable voltage, while the 4–20 mA output uses a current-loop signal. The selected output must match the controller's input requirements.

Q: Can the ACI 122687 replace an existing duct humidity sensor?

A: It may be suitable when the existing transmitter's measurement requirements, accuracy, power supply, analog output, wiring, and mounting configuration are compatible.

Q: Does the ACI 122687 measure temperature as well as humidity?

A: The A/RH2-D is identified as a relative humidity transmitter. Temperature measurement capability should not be assumed without confirmation from ACI.

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.

122687 is the cross for A/RH2-D