A/RH2-1K-2W-D is a duct-mounted humidity sensor/transmitter from Automation Components, Inc. designed for monitoring relative humidity in air ducts and feeding configurable signals to building automation systems. It provides selectable outputs—including the default 4-20 mA and voltage options of 0-5 VDC or 0-10 VDC—and includes a 1 kΩ platinum RTD paired with a 20 kΩ thermistor for temperature sensing. The sensor is protected by a stainless-steel sintered filter for moisture resistance, and it delivers room-temperature RH accuracy of about ±2% in typical environments while used in HVAC duct monitoring.
