HumiTrac Relative Humidity and Temperature Transmitters

HumiTrac: Relative Humidity and Temperature Transmitter

HumiTrac™, Telaire's next generation relative humidity and temperature transmitter designed to serve the building automation/HVAC market, as well as a wide variety of general purpose relative humidity monitoring applications.

All HumiTrac models incorporate a NIST traceable, field-replaceable sensor tip, a rugged capacitive sensing element capable of full-scale 0 to 100% RH measurement and a host of field configurable output options.

HumiTracTM humidity transmitter features a NIST traceable, field-replaceable sensor tip module that allows the end user to replace the sensor on-site and maintain ±2% RH accuracy and NIST traceability. This virtually eliminates the need for time consuming and costly factory calibration, while reducing downtime during service intervals to near zero. HumiTrac is designed to be highly configurable in the field - by minimizing the necessary number of orderable configurations,

Advanced Sensors reduces distributor inventory costs and provides maximum flexibility to the installer. All HumiTrac versions feature field-selectable outputs (0-5V, 0-10V, 4-20mA) and passive temperature versions incorporate both a 3K and 10K O thermistors. Signal-conditioned temperature versions are available scaled from 0 to 50°C or -40 to 60°C. HumiTrac is available in humidity accuracies of ±2%, ±3% or ±5%, and offered in wall mount, duct mount and outdoor air configurations.

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HumiTrac Specifications


  • NIST-Traceable, field-replaceable sensor
  • NIST-Traceable factory calibration
  • User-selectable RH & temperature outputs
  • Robust, proven capacitive sensor technology
  • Attractive and rugged packaging
  • 2%, 3% or 5% RH accuracy
  • NIST certification available
  • Versatile temperature measurement
  • Low cost of ownership
  • Two-year warranty


  • HVAC/building controls
  • Energy Management Systems (EMS)
  • Enthalpy control
  • Indoor Air Quality (IAQ)
  • Clean rooms
  • Museums/archives
  • Hospitals/labs
  • Refrigeration control
  • Pharmaceutical
  • Animal rooms
  • Food Storage


Environmental Conditions

Operating Range
  • -40°F to 140°F (-40°C to 60°C)
  • 0% to 99% RH (non-condensing)
Storage Temperature
  • -67°F to 185°F (-55°C to 85°C)


Sensing Element
  • Capacitive polymer sensor
Accuracy at 71.6°F (22°C)
  • ±2% version: ±2% 10 to 90% RH
    ±5% 0 to 10% & 90-99% RH
  • 3% version: ±3% @ 10 to 90% RH
  • 5% version: ±5% RH @ 0 to 99% RH
    *Includes hysteresis, linearity and repeatability
Long Term Stability
  • Less than 1% drift per year, typical
Temperature Effect**
  • Delta %RH = (0.0014 x %RH + 0.1325) x T°C -
    (0.0317 x %RH + 3.0876)
  • See accuracy statement
  • See accuracy statement
  • 70%RH 1h ->90%RH 1h ->30%RH, Vair = 2m/sec)
Signal Outputs
  • 4 to 20mA, 0 to 5V or 0 to 10V (user selectable)
**Not applicable to signal-conditioned temperature units.

Temperature-Direct Connection Thermistor

Sensing Element
  • 10K S thermistor at 77°F (25°C)
  • 3K S thermistor at 77°F (25°C)
Signal Output
  • Direct connection, user selectable between 3K or 10K
  • Refer to DC95F103W (10K) and DC95F302W (3K) from GE

Temperature-Signal Conditioned PRTD

Calibration Accuracy at 71.6°F (22°C)
  • ±0.5°F (±0.3°C)
Long Term Stability
  • Less than 0.2°F drift per year
Sensor Interchangeability
  • ±0.5°F (±0.3°C)
Signal Outputs
  • 4 to 20mA, 0 to 5V or 0 to 10V (user selectable)

Power Requirements

Supply Voltage
  • 12 to 30 VDC
Maximum Load (current output only)
  • S = Supply Voltage-10/0.02
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