Elcometer 309 Delta T Hygrometer

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Before painting, the coater must meet the coatings’ parameters. These are clearly specified on the paint manufacturer’ s product data sheet.

Relative Humidity ( RH) and Delta T ( T� ) are the two climatic values which are specified on data sheets.

The Elcometer 309 Delta T Hygrometer provides a simple and fast measurement of these two critical characteristics.

Delta T ( T� ) : The difference between the surface temperature ( Ts) and the dewpoint temperature ( Td) . When T� is less than 3º C ( 5º F) painting should not occur.

Relative Humidity ( RH) : This is the amount of water vapour taken up by air. Expressed as a percentage, RH is dependent on the air temperature. Typical maximum RH values specified by paint manufacturers are between 75% and 85% .

Rugged design: Suitable for use in extreme environments the Elcometer 309 is dustproof and waterproof with fully sealed sensors.

High / Low Limits: Displayed on screen graphically as either (  ) or ( X) with flashing Red or Green LED’ s to indicate pass or fail.

Delta T Temperature: T� is pre-set at > 3º C ( > 5º F) , the industry norm.

Relative Humidity: User definable upper limit can be set for RH.

Measurement Hold / Release function: With a single button press readings are ‘ frozen’ on the screen. These can then be recorded before, simply pressing the button again to ‘ unfreeze’ the screen and then take further readings as necessary.

Backlight: Provides clearly lit information – ideal in dark or confined spaces.

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