Unique advanced flow sensor capable of measuring100ppbOxygen content below. Compliant with recognized intrinsic safety standards (Pending approval) standard, applicable to hazardous areasClass 1, Division 1, Groups A-DStainless steel sensor housing and quick release connection. It has automatic range, zero calibration, and system diagnostic functions. The battery can be recharged after overnight charging60Oh my god. There is also a portable instrument box.

range-Standard item:0-10 ppm, 0-100 ppm, 0-1000 ppm, 0-1%, 0-25%