... sWorking Humidity: <93%RHIP Grade: IP 44Application1, Applies in Water Heater, Air-Condition, Sewage Disposal and other ... boiling without water and unsafe problems. 2, Applies in level control and temperature settings of household Appliances, such as Refrigerator ... etc...3, Applies in Automobile Counter, Door Induction System, Water Tank's temperature detecting and Oil level control, etc... Pictures: