The Model 300T Trace Oxygen Transmitter accurately monitors oxygen in a wide variety of gases. These reliable, loop-powered transmitters offer full scale ranges from 0 - 10 ppm. The 300T provides a two-wire, 4-20 mA output signal that is linearly and directly proportional to the oxygen content of the gas being monitored.

The load resistance is connected in series with a DC power supply and the current drawn from the supply is 4-20 mA output signal