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A/RH2-TT1K-O-4X-2 Outside Air Humidity and Temperature Transmitter by ACI

Manufacturer: ACI
SKU: A/RH2-TT1K-O-4X-2
Availability: 1 in stock
Non-Stock Lead Time: 2-6 Bus. Days
Minimum Order Quantity is 1
Products specifications
Attribute nameAttribute value
RH SensorCapacitive with Hydrophobic Filter
RH Output0-5 Vdc, 0-10 Vdc, 4~20 mA
Temperature SensorPlatinum
Temperature Output1-5 Vdc, 2-10 Vdc, 4~20 mA
Error %2
Supply Voltage12~40 Vdc, 15~40 Vdc, 18~28 Vac, 18~40 Vdc
TypeOutside Air


The ACI Relative Humidity with Temperature Transmitter Outside Air Series utilizes a thermoset polymer capacitive sensing element with a factory applied hydrophobic filter to deliver a proportional analog current or voltage output signal

  • The hydrophobic filter provides added resistance to moisture, dust, and other chemicals for greater long term reliability
  • The RH Outside Air transmitter features integral DIP switches for field selection of the proper output signal and supply voltage to meet your applications requirements
    • 0-5Vdc
    • 0-10Vdc
    • 4-20mA
  • Each unit also contains 0%, 50%, and 100% test options to verify that the transmitter is both working and wired properly
  • Field calibration can be performed by using the increment and decrement calibration DIP switches without the need to replace the sensing element
  • These enhancements provide increased flexibility and outstanding long-term reliability
  • The temperature transmitter can be used as either a two-wire 4-20mA proportional output or as a 3-Wire voltage output transmitter that includes a 100 Ohm or 1K Ohm Class A, Platinum RTD
  • All RH-TT Series Outside Air transmitters are mounted in a IP66/NEMA 4X enclosure with a 4.5" polycarbonate tube to protect the sensing elements from dust, rain, and snow
  • These units should be installed under an eave or protective shield on the north side of the building (Northern hemisphere) out of direct sunlight
  • The RH transmitter is conformally coated for added protection from moisture and other contaminants
  • NIST Calibration Certificates are available for all RH TTM part series
  • Applications
    • Monitoring Outdoor Temperature and Humidity
    • Humidification
    • Dehumidification
    • Roof Top Units
    • Air Handlers
    • Enthalpy and Dew Point Control Calculations
    • Process Control
    • Wash Down
    • Warehouse
    • NIST Certified Applications