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WireFree Model OI-WF190 Sensor Assembly

The Otis Instruments, Inc. WireFree Model OI-WF190 Sensor Assembly is an innovative wireless gas detection system designed to monitor gas in hostile environments without the use of wires or conduit from the controller to the sensor.
WireFree Model OI-WF190B (the Beast) Combustible Gas Sensor Assembly

The Otis Instruments, Inc. WireFree Model OI-WF190B (the Beast) Combustible Gas Sensor Assembly is an innovative wireless gas detection system designed to monitor gas in hostile environments
WireFree OI-WF590 is a WireFree Transmitter

Otis Instruments, the OI-WF590 is a WireFree transmitter to be used in conjunction with ANY 4-20mA output sensor—such as a flame, temperature or tank level—via 4-20mA signal.
WireFree Model OI-WF690 Sensor Assembly

WireFree Model OI-WF690 Sensor Assembly is an innovative wireless gas detection system.