The Edgetech Instruments Model OxyTrans-PSS is a portable oxygen transmitter that is fast responding, accurate and is capable of measuring oxygen at trace or percent levels. The OxyTrans-PSS has the capability of measuring oxygen between 0 - 10,000 ppm or 0-25 % and offers ease of operation with a large readable LCD display and a durable aluminum case that protects the measuring equipment during transport. 4-20 mA Loop Powered Two Wire Oxygen Transmitter The OxyTrans-PSS uses a special micro-fuel cell to measure the oxygen concentration. The sensor meets the industrial requirements for accuracy, sensitivity, easy to use and has a long operating life. The calibration of the instrument for trace oxygen measurements in gas should be done with a known calibrated gas. The concentration can be chosen freely within the measuring range. The measuring cell is modular and made of stainless steel. A defective measuring cell can be repaired by replacing the defective part only, rather than the complete unit.