The OM-4 Oxygen Analyser is designed to measure Oxygen levels for welding stainless steel pipes, tubes and tanks to prevent coking, oxidation and discolouration. It shows when the Oxygen has been removed down to 0.01% (100ppm) indicating that there are no leaks.

Resolution 0.01%
Range 0.05 – 25% Oxygen
Aspirator with probe and hose

The OM-4 has a large digital display and operates from an internal, temperature compensated, electrochemical Oxygen sensor (expected life 2 years). Power is provided by a 9V, 4000 hour life battery giving up to 3 year operation before replacement is necessary.