Diffusion sampling O3 gas detector OC-901 and pump-sunction sampling Ozone gas alarm OC-903 with the same working principle, both inspect of the Ozone gas and then transmit the gas concentration into the related data displaying on the detector screen.

But the difference is the sampling:

For OC-901 portable O3 gas detector , it need to be placed in the detecting area, then the Ozone flow into the gas detector with the free flow of the air, the gas alarm will inspect the O3 gas concentration. This testing mode usually will be affected by the environment, such as the temperature, humidity, pressure, wind speed, etc. So, it will unavaible for the low pressure gas source. But this advantage is the economic price, for OC-901 gas detector we also install the imported sensor, so the measurement results not bad.

OC-903 portable Ozone gas monitor we have installed the inner pump, it will suck the sampling and then convey the gas to the gas detector to inspect the gas concentration. The features of this pump-sunction gas detector is the quickly response, if in dangerous area, could measure remotely, this is safe for the operation people. This model avaible suitable for the dangerous place, or other with the high demands of the response and pressure, etc.

Pump is the important component of the gas detector, also decide the device working life and stability. This pump designed according to the flow, pressure, power, low sound, working life, ect.

For above two model, both with the original imported electrochemical sensor, with the working life of 3~5 years. If not use the gas detector for a long time, pls place it under the low temperature environments, this will extend it working life.