The invention relates to a device for monitoring the state of a system, in particular safety switches for monitoring the closed state of safety equipment of a machine, wherein the device is provided with a switch head and an actuator, which can be brought into interaction with one another and thus control the device. A validation system suitably receives configuration data from the multi-tenant application server for each of the services provided. The first tube includes a receptacle therefor for receiving a fluid sample that is accessible from the open end. The internal thermal energy exchanger is configured to receive a second fluid from a second fluid source therein, wherein the first fluid is a refrigerant and the second fluid is at least one of a phase change material, a coolant, and a phase change material coolant.