S-21 was developed to measure indoor air pollutants with exclusive detector tubes. Formaldehyde can be measured from 0.01 ppm to 0.12 ppm at 30 minutes of sampling duration. WHO guideline value of Formaldehyde is 0.1 mg/m3 which is equivalent to 0.08 ppm.

Specifications

• Air pump: Diaphragm system
• Adjustable flow rate: 50-500ml/min
• Adjustable sampling time: 0.01 sec ~ 99.9Hrs
• Power supply: AC100V or AC220V (Factory preset)
• Dimensions: 120(W) x 140(H) x 220(D) mm
• Allowable temperature range: 0 ~ 40°C
• Weight: Approx. 2.5kgs

Applied detector tubes

• No. 710 Formaldehyde: 0.01 ~ 1.20 ppm
• No. 721 Toluene: 0.2~2.0 ppm
• No. 730 p-Dichlorobenzene : 0.01 ~004 ppm