Temperature / Relative Humidity Probe

TRH-100 Temperature and Relative Humidity Probe - Pace Scientific

TRH-100 Temperature & RH Probe

Connects directly to any XR440 or XR5-SE Data Logger.  No external power required.

Uses two input channels, one for temperature (dry bulb) and one for % RH, Wet Bulb, or Dew Point (software selectable).  May also be used with other data acquisition systems, see electrical specifications for details.

  • High Accuracy
  • Long Term Stability
  • Wide Temperature Range

Connect up to two (2) Temperature / RH Probes to the XR440 Data Logger

Connect up to four (4) Temperature / RH Probes to the XR5-SE Data Logger

Specifications, TRH-100 Temp & RH Probe

RH Accuracy ±3% RH from 0 to 95% RH
Stability ±1% RH typ. at 50% RH in 5 years
Repeatability ±0.5% RH

Temperature Accuracy

(using 12 bit mode if XR440)

±0.15°C from 0 to 40°C (±0.27°F from 32 to 104°F)

±0.3°C from -25 to 85°C (±0.55°F from -13 to 185°F)

Temperature Sensor Interchangeability ±0.1°C from 0 to 70°C
Physical Rugged housing with sintered stainless steel filter.
Probe Size 0.5" dia. x 2.5" long (13mm x 64mm)
Color code

Black: Ground

White: 5 Vdc Power

Green: RH Output (~1 to 4 V)

Yellow or Red: Temperature (resistance)

Cable diameter 0.165 inch (4.19 mm)
Cable conductors 22 AWG stranded copper
Model with 1FT leads 24 AWG stranded copper
Operating Temperature -40 to 85°C* (-40 to 185°F)*

*Continuous use above 70°C (158°F) in high humidity environments (above 70 % RH) is not recommended.

Available Models

Part No. Lead length Price
TRH-100 1 ft (0.3 meter) leads $205.
TRH-100-10FT 10 ft (3 meter) shielded cable $220.
TRH-100-20FT 20 ft (6 meter) shielded cable $225.
TRH-100-50FT 50 ft (15 meter) shielded cable $240.

For using the TRH-100 with other data acquisition systems see TRH-100 Electrical Specifications.

The TRH-100 probe has a drift spec of less than 1% RH in 5 years.  For calibration information, refer to re-calibrating the TRH-100 Probe.

Relative Humidity plug-in modules are available for the XR440 Data Logger.  See TRH-200 and TRH-300.

Multi-channel Temperature Humidity Data Logging


XR440 Data Logger

XR5-SE Data Logger

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