Humidity / Temperature Transmitter

Precision environment sensing.

A commercially available temperature and humidity probe module built for environmental chambers, OEM systems, and labs upgrading critical measurement hardware.

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-40 to +120 °C: Remote probe range
0 to 100% RH: Humidity working range
4-20 mA: Industrial output

RE85TH probe module with industrial application environments — Engineered for chamber, lab, HVAC, and controlled-environment measurement.

Proudly Canadian Designed for precision environmental testing systems.

Built for chamber builders

Built for controlled environments.

High-accuracy RH measurement

Factory calibration uncertainty is listed at +/-1.5%RH at 20 °C, with operating accuracy bands defined across the full temperature range.

High temperature tolerance

The remote sensing probe is specified for -40 to +120 °C, supporting environmental, temperature-humidity, and validation chamber applications.

OEM-ready signal path

24V DC supply and 4-20 mA output make RE85TH practical for industrial control panels, chamber controllers, and retrofit measurement upgrades.

Applications

Trusted temperature and humidity data.

Clean calibration lab setup for temperature and humidity probe testing

Temperature humidity chambers

Measurement modules for chamber manufacturers and controlled-environment OEMs.

Environmental testing labs

Replacement or upgrade probes for validation, qualification, and testing workflows.

Industrial QA environments

Continuous measurement in production test cells and high-temperature humidity programs.

Technical data

RE85TH specifications.

Supply voltage	24V DC +/-10%
Current consumption	< 50 mA
Component board temperature	-5 to +60 °C (+23 to +140 °F)
Sensing probe temperature	-40 to +120 °C (-40 to +248 °F)
Temperature sensor element	Pt100
Output signal	4-20 mA
Relative humidity range	0 to 100%RH
Response time at 20 °C	< 20 sec. with filter
Factory calibration uncertainty	+/-1.5%RH at 20 °C

Humidity accuracy

At -20 to +40 °C: +/-2%RH from 0-90%RH and +/-3%RH from 90-100%RH. At the outer temperature bands: +/-2.5%RH from 0-90%RH and +/-3.5%RH from 90-100%RH.

Discuss fit for your chamber

Integration details

Dimensions and wiring.

RE85TH operating elements schematic — Operating elements and calibration interface.

RE85TH product dimensions drawing — Product dimensions in millimeters.

RE85TH installation wiring diagram — Installation wiring reference.

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Reals Environmental Testing Labs Inc.
3-561 Edward Ave, Richmond Hill, ON L4C 9W6, Canada