1. Range: 0-500ppb to 0-20ppm (double range and automatic range are optional)
2. Concentration unit: ppb, ppm, ug/m3, mg/m3 (optional)
3. Lower detection limit: 0.4ppb
4. Zero drift:<0.5ppb/24h
5. Range drift:<1% F.S./24h
6. Linearity:<1% F.S
7. Repeatability:<1%
8. Response time: T90<60s
9. Sample gas flow: (500 ± 50) sccm
