ServersCheck Dry Contact Sensor Probe
The InfraSensing Dry Contact (voltage free contact) sensor monitors the state of any electrical dry contact output enabled device and can control equipment using one of its 4 outputs. Examples of such devices: alarms, generators, control relays, valves, fans, HVAC, etc. The sensor has 16 distinct dry contact inputs. They can be configured (on a per port basis) to monitor either a normal open (NO) or normal closed (NC) state. Not only can you define the normal state but you can also set a minimum time that a state should be in before triggering an alarm. On top of the 16 inputs, the device also features 4 outputs. With the outputs you can control equipment.