規格:
★Flow Rate：0.5L/min
★Linearity：±2.0% of span (at concentrations of 10% to 100% of span)
★Lower Detectable Limit：0.050ppm CH4 - 0.050 NMHC as   propane (300 second averaging time)
★Precision：2.0% of reading or 50ppb (whichever is larger)
★Accuracy：±1% of range
★Certifications：ETL, CSA, UL, CE
★Measurement Ranges：0 to 5, 50, 500ppm, or 0 to 10, 100, 1000ppm, or 0 to 20, 200, 2000ppm , or 0 to 50, 500, 5000ppm (Group selectable at time of order)
★Response Time：Approx. 70 seconds
★Span Drift：<2% span value (without auto calibration)