For Acids, Alkalis, and Salts

The working principle of temperature sensors for acids, alkalis, and salts relies on the conduction of thermal energy through a chemically inert barrier to an internal sensing element, typically a Platinum Resistor (Pt100) or a Thermocouple junction. In these corrosive environments, the sensor operates by detecting changes in electrical resistance or voltage—such as the Seebeck effect in thermocouples—while a protective sheath made of PTFE (Teflon) or tantalum acts as a thermal conductor that simultaneously shields the electronics from ionic attack and oxidation. As the temperature of the acidic or alkaline solution fluctuates, the heat permeates the corrosion-resistant jacket to reach the internal transducer, which then converts the thermal kinetic energy into a precise electronic signal (measured in ohms or millivolts) for process control.