AD31 Waterproof Conductivity-TDS-TEMP Pocket Testers with replaceable electrode

AD31 is a waterproof Conductivity, TDS and temperature tester. The housing has been completely sealed against humidity. All Conductivity and TDS readings are automatically temperature compensated (ATC), and temperature values can be displayed in °C or °F units. The Conductivity/TDS conversion factor (CONV) can be selected at one point. Measurements are highly accurate with a unique stability indicator right on the LCD. 
The model is also provided with a low battery symbol which warms the user when the batteries need to be replaced. The AD32P probe supplied with the meters is interchangeable and can be easily replaced by the user. The encapsulated temperature sensor allows fast and accurate temperature measurements and compensation.