I've researched this some months ago, but it isn't a one time cost. I arrived at this model: https://www.draeger.com/en_aunz/Applications/Products/Mobile... But if you want to do it right, you also need a calibration…
I've researched this some months ago, but it isn't a one time cost. I arrived at this model: https://www.draeger.com/en_aunz/Applications/Products/Mobile... But if you want to do it right, you also need a calibration…