The LCS140 is a Wet-Bulb/Dry-Bulb system for monitoring high temperature humidity levels. Includes ISO17025 accredited calibration certificate.


MadgeTech recommends annual calibration.


Need to record humidity at high temperatures? Look no further than the LCS140 Wet-Bulb/Dry-Bulb system. Ditch the complexity of calculating with a psychrometer, the LCS140 coupled with the MadgeTech 4 Software does all the work for you!

Capable of withstanding temperatures from -40 °C to +140 °C (-40 °F to +284 °F), the dual probe LCS140 takes wet-bulb and dry-bulb readings simultaneously to determine the amount of humidity present.

The LCS140 Includes:
(1) LCS140 Dual Probe Data Logger
(1) Aluminum Reservoir Bottle (recommended to use distilled water only)
(6) Wet-Bulb Socks
(1) Hanging Fixture

The LCS140 is compatible with the latest MadgeTech 4 Software making starting, stopping, and downloading simple and easy. Graphical, tabular, and summary data is provided for analysis and can be viewed as customizable engineering units.

*Note: Only distilled water is recommended for use in the reservoir bottle.


Memory 32,767 readings
Reading Rate1 reading every second up to 1 reading every 24 hours
Battery Life1 year typical

Fast reading intervals and extreme temperatures will shorten the battery life substantially

User Replaceable Battery
Material316 Stainless Steel / Radel
IP RatingIP68
Operating Environment-40 °C to +140 °C (-40 °F to +284 °F)
0 %RH to 100 %RH, 0.002 PSIA to 100 PSIA


Temperature SensorRigid RTD Probe
Temperature Range-40 °C to +140 °C (-40 °F to +284 °F)
Temperature Resolution0.01 °C (0.02 °F)
Calibrated Accuracy±0.1 °C (±0.18 °F)


LCS140 Product User Guide
LCS140 Specification Sheet

Support Videos

LCS140 | Product Overview

LCS140 | Live Overview


Part Numbers

LCS140 – 902168-00


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