HS-04 (Hydrogen Sulfide Gas Detector)

Gas Detected: Hydrogen Sulfide (H2S)
Detection Principle: Electrochemical

Measuring Range: 0 – 100 ppm (0.5 ppm)
Alarm Set Points: 1st 5.0 ppm, 2nd 30.0 ppm, TWA 1.0 ppm, STEL 5.0 ppm, Over 100.0 ppm

Gas Sampling: Diffusion
Response Time: T90 in 30 seconds 
Accuracy: ± 5% of reading or ± 2 ppm H2S