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Heater unit for the SIP series (1 pc.) (Allows the SIP detectors to Operate to -40° F). The SIP-HU is a heater unit from Optex which is specially manufactured to be used for the SIP series (1PC). The SIP-HU heater unit is highly constructed for use within colder climates to help operate the SIP in temperatures of -40?. The SIP-HU heater unit also consists of a lightweight size, and easy installation process, and is able to keep the system fully functioning on even the colder days.
