THE JUMO eTRON M is a digital electronic microstat for easy temperature control (heating or cooling). Depending on the hardware version RTD temperature probes, thermocouples, or current/voltage standard signals can be connected to the measuring input. The actual value is displayed on a three-digit back-lit display. The relay switching statuses are indicated by LEDs. A defrosting function and an operating hours counter are integrated in the device, which can, for example, detect the cooling compressor runtime. Four keys on the front are used for operation. A configurable operating level enables quick access to important parameters. The electrical connection occurs via screw terminals. A setup program and a PC interface are available as accessories for easy configuration and parameterization on the PC.