Ar820 formaldehyde gas detector introduction Ar820 household formaldehyde gas detector, which adopts imported advanced sensors, are of excellent performance, high accuracy and stability, and are able to implement continuous real-time detection. This type of detectors can be applied in household, offices and any other dwellings. Ar820 formaldehyde gas detector product specifications * measurement range: 0~5.0 ppm * resolution: 0.01 ppm * accuracy: ±5% * temp. Measuring range: 0'c~40'c/32'f~104'f * temp. Resolution: 0.1'c/0.1'f * temp. Accuracy: ±2'c * humidity measuring range: 10~95%rh * humidity resolution: 0.1%rh * humidity accuracy: ±5%rh