O2S-FR-T4 series oxygen sensors are small, flange mounted sensors, available with a number of termination options.

O2S-FR-T4 is terminated with 4 spade connections. The second heater connection is made via the sensor body.

O2S-FR-T4-4P is terminated with 4 stainless steel wires. The second heater connection is made via the sensor body.

O2S-FR-T4-5P is terminated with 5 stainless steel wires. The heater is fully isolated from the sensor body.

Please note that it is not recomended to solder the sensor connections but to use crimps or some other similar type of connection.

These sensors are small, reliable, simple to operate and can be incorporated in controllers of varying complexity.