ACI ACI-RH3-O-010 Outdoor Humidity Transmitter 3% MA/VDC

The ACI Relative Humidity with Thermistor Duct Series uses a durable capacitive sensing element with a hydrophobic filter for strong resistance to moisture, dust, dirt, oils, and chemicals. It offers flexible configuration with DIP switches for output selection and can operate on AC or DC power. The unit includes built-in 0%, 50%, and 100% test modes to verify proper operation and wiring, along with easy field calibration via DIP switches—no sensor replacement required. Designed for harsh environments, it features a weatherproof enclosure, conformally coated circuit boards, and a stainless-steel filter for added protection, ensuring long-term reliability.

ACI A/RH3-O Features:

• Capacitive with Hydrophobic Filter RH sensor type
• Less than 2% drift RH Stability
• Voltage Output: 8 mA maximum (0.32 VA)
• 4-20 mA: 700 Ohms maximum Output load resistance
• 2-wire: 4 - 20 mA (Factory Default) output signals
• 0-100% Measurement range
• -40 to 140°F (-40 to 60°C) Operating temperature range
• -40 to 149°F (-40 to 65°C) Storage temperature range
• Model Dependent: +/- 1% over 20% RH Range between 20 to 90% | +/- 2%, or 3% from 10 to 95% Accuracy at 77°F(25°C) 

Technical Literature:

RH Outside Air Datasheet