Thermostat. Allow to monitor the temperature constantly when certain values must not be exceeded. Advisable for all applications, at which a cooling (NO blue knob) and/or heating (NC red knob) system is used. It is possible to define an operating temperature range in order to prevent potential alterations by inexperienced personnel.External case of auto-extinguishing plastic material as per UL94V-0. Protection degree: IP20 as per EN 60529. Thermostats are easy to fix by means of the accessory provided within the delivery set.