The controller ST64-31.10 was developed for simple thermostatic controls. The round housing allows applications at locations in which formerly only mechanical controls were in use. The unit is supplied with a tension of 12-24V AC or 16-36V DC and is pre-set for Pt100 sensor. The installed relay has a maximum electric Ohm load of 5A. Inductive loads can be switched up to 2,2A. 900197.020