Libratherm offers various models of digital heat levels and workflow on/off controllers. User has the option of selecting the model founded on the category of input, Type of manual or electronic interface, And required size. All the models are crafted to suit most of the industrial applications. This digital on/off safety controller is provided in the measurements of 48w x 96h x 75d mm, Accepts input from j, K, Thermocouple, Pt, 100, 4, 20ma, And provides 2 relay output or 2 ssr output along with retransmission of 4, 20ma. Key utilizes a microcontroller system design. Software linearized for better measurement accuracy. Works on universal 90, 240 vac. Universal and user-defined input option from process transmitters/temperature sensors. 1 to 2 relay or ssr output. Industrial standard analog and digital interface.