Only thing is if we need to send it for calibration even if it was used once or twice a year it will cost half.the price of a new one to calibrate according to testo....that I'm not happy with I have the 310
Hi Derek, the testo 320 has been discontinued and is replaced with the testo 300, which indeed has a NOx filter. The testo 310 also has the NOx filter as well.
The 327-1 has been discontinued, but we do have some videos on it at the links below: ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-pBaT5ZXhA8s.html ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-1ku8mH1k8LY.html
