The BTC48 temperature controller has no temperature value indication and thus is applicable in cases, in which the low price is one of the major requirements, especially in food industry and household applications. With its 48×48 mm DIN-sized front panel, BTC48 is best suited for applications, in which small size is important too. The device works with either an RTD temperature sensor or a thermocouple type “J” or “K” and can be used for controlling various temperature processes and driving electrical actuators by the means of a relay control output and through ON/OFF algorithm. A potentiometer and a dial on the front panel enable easy set-point adjustment, and a red LED – a clear sensor break indication. The controller can be mounted on a panel, on a rail, and in a socket. Inexpensive, compact, and easy-to-use, the BTC48 temperature controller is one versatile general-purpose control device.