Calibrating the Polytron 8700

[@NDV-eg7ie]

Could you make a video about open path gas detector Sir?

[@iristatianar]

Hello, I have a question, Is this the same procedure for an Analyzer PIR 7000 ???

[@njIvanvlog157]

Pls focus video on indicator

[@niloyu105]

Watching here Al Khafji Saudi Arabia...

[@niloyu105]

Thank you for informative video