Product Description
Technical Specification
Instruction Manual
Data Sheet

Elcometer 308 Hygrometer

The Elcometer 308 Hygrometer provides a simple and fast measurement of relative humidity (RH) and surface temperature (Ts) and is ideal for use in very hot climates.

The Elcometer 308 Hygrometer has been specifically designed for use in very hot climates where the surface temperature of the substrate can exceed the paint manufacturer’s recommended limits for successful painting.

Painting outside recommended limits can have a detrimental affect on the performance and lifetime of the coating.

Key features of the Elcometer 308 Hygrometer include:

  • Rugged design: Suitable for use in extreme environments the Elcometer 308 Hygrometer is dustproof and waterproof with fully sealed sensors.
  • Measurement Hold / Release function: With a single button press readings are ‘held’ on the screen.  These can then be recorded before simply pressing the button again to ‘release’ the screen and continue to take further readings as necessary.
  • Backlight: Bright screen making information easy to read – ideal in dark or confined spaces.
Elcometer 308 Hygrometer
Elcometer 308 Digital Hygrometer

Technical Specification

Part Number Description Certificate
G308----1 Elcometer 308 Hygrometer
Operating Range

-20ºC to +80ºC (-4 ºF to +176ºF)


Surface Temperature (TS)

-20ºC to +80ºC (-4 ºF to +176ºF)


Relative Humidity (RH) & Accuracy*

0% to 100% RH (±3%)

Resolution 0.1ºC (0.1ºF)  / 0.1%  

Power Supply

2 x AA batteries or via USB Cable

Battery Life Greater than 40 hours (Backlight off)  
Dimensions 180 x 75 x 35mm (7 x 3 x 1.4”)  
Weight 300g (10.6oz)  
Packing List Elcometer 308 Hygrometer, wrist strap, 2 x AA batteries, protective pouch with belt clip, RH & surface probe calibration certificate and operating instructions  


* At 1m/s 

Basic Calibration Certificate supplied as standard


Part Number Description
T99921192 Protective Carry Case / Pouch
T99921325 USB Cable
T99916063 Wrist Strap
TCAL-308F Optional Full Calibration Certificate


Climatic Conditions

An Introduction to Climatic Testing

When it comes to applying a coating; whether in a shipyard, in a construction yard, or even in a warehouse; even if you have successfully controlled and monitored the surface cleanliness, surface profile, and both the wet and dry film thickness, if the climatic conditions are wrong at the time of application, this could cause the coating to fail – regardless of the success of the other parameters.

Click here to download the video script in English.