Measurement range: 0.1 to 2% Sent amount/time: 20ml/2 minutes Discoloration: yellow-tan → green-brown Temperature and humidity correction: temperature Expiration date: up to 3 years Support gas: propane Measurement range: 0.1 to 2% Support gas: propane (injection method) Execution period (years): 3 测量范围(PPM):0.1至2.0% 测量范围(VOL%):0.1至2.0