Liquid Expanding Non-power Thermometer
As a non-power thermometer, it is designed to indicate the temperature according to the liquid expanding coefficient, so that you can always check the temperature without electrical equipment, by installing a sensor where you want to check the temperature.
Temperature range from -40°C to 120°C with this product.
The Low-temperature applications are for a freezer, freezing warehouse, agricultural greenhouse, Icehouse
High-temperature applications are for a water heater, boiler, sauna and so forth.