1、 Overview
This instrument complies with the national standards of GB/T18204.2-2014 "Methods for hygiene inspection in public places" and GB/T9801-88 "Determination of carbon monoxide in air quality - Non dispersive infrared method", and conforms to the national metrological verification regulations of JJG635-2011 "Infrared gas analyzers for carbon monoxide and carbon dioxide".
The main technical indicators of this instrument meet the technical requirements of national second-class instruments and can obtain a second-class calibration certificate from the Chinese Academy of Metrology.
This instrument has a built-in zero adjustment filter and a six way valve for switching between zero adjustment and measurement, making it easy and flexible to operate.
This instrument can display mg/m3; Can customize measurement range; It can be customized into an instrument with the function of measuring and displaying daily averages.

2、 Main technical indicators
Measurement principle: Non dispersive infrared analysis method/Non dispersive infrared method (NDIR)
Sampling method: built-in pump suction
Measurement range: 0~50.0 × 10-6 or 0~200.0 × 10-6
Resolution: 0.1 × 10-6
Repeatability: ≤ 1% F·S
Zero drift: ≤ ±2% F·S/h
Range drift: ≤ ±2% F·S/3h
Linear deviation: ≤ ±2% F·S
Response time: t0～t90≤45S
Preheating time: ≤ 30min
Flow range: （0.5-2.0）L/min
Digital interface: RS232， Equipped with data transmission software
Storage function: ≤ 5000 sets of measurement data
Standard configuration: host, sampler, strap, rechargeable battery, charger, small screwdriver, floppy disk, connecting cable, technical files, portable case
Power supply: AC/DC dual-use, 220AVC (± 10%) or built-in rechargeable battery
Dimensions: 245 × 190 × 85 (mm)
Weight: ≤ 3kg