This is the replacement temperature sensor for the FA-I-CCA and FA-D2 FreezeAlarms only. The sensor is offered in four lengths. The 3.5' length is the version that is normally shipped with these FreezeAlarm models. Other lengths include a 25', 50' and 90' options. The sensors feature a nickle plated capped sensor that is not submersible in water. It needs to be placed in a well with insulating putty or other material if monitoring liguids. The sensor has an RJ9 telephone headset type connector that is only compatible with the FA-I-CCA and FA-D2 FreezeAlarm models.
