The DPLD-1 dew point meter is a special instrument developed to test the dew point performance of insulating glass according to the instrument developed by the People's Republic of China National Standard GB11944 <<Insulating Glass>>. The instrument consists of a copper seat glass tube and a dedicated low temperature digital thermometer. Instructions: 1. Inject about 25mm of ethanol or acetone into the glass tube of the dew point meter, add dry ice to lower the temperature to -40 °C, open the switch of the digital thermometer, insert the thermometer into the glass tube, observe the temperature of the dew point meter, and in the whole test process The temperature was kept at -40 ° C by adding dry ice to the glass tube. 2. Pour a little ethanol or acetone on the surface of the sample and keep the dew point meter in close contact with the surface of the sample for 3 minutes. 3. Remove the dew point meter and immediately observe the inner surface of the glass sample for condensation or frost. Stainless Steel Drinking Cart,Dining Service Cart,Service Trolley Cart,Food Trolley Cart Jiangmen Pengjiang Hetang Meijin Stainless Steel Products Factory , https://www.ukwkitchenwares.com