Digital Flowmeters For those who prefer data acquisition and logging with completely electronic, multifunction devices. For non-corrosive gas streams. Description Low Flow (mL/min) High Flow (mL/min) Accuracy Flow through design Gases measured (non-corrosive) Volumetric1 or mass2 flowmeter RS232 capability Unique Features Power supply Precision Gas Flow Meter 5 500 ± (0.8% of reading + 0.2% of full scale) Yes N2, H2, He, Air, CO2, CH4, 95% Ar/CH4 Both RS232 output Displays mass flow, volumetric flow, temperature and pressure readings simultaneously, RS232 output 9v battery ADM 2000 0.5 1000 ± 3%* No All Both RS232 output Easy-to-use digital volumetric flowmeter, with calculated mass flow measurement and RS232 output 9v battery or 110v/220v AC ADM 1000 0.5 1000 ± 3%* No All Volumetric none Economical digital volumetric flowmeter for most chromatographic flow measurements 9v battery 1 Volumetric measurements are accurate and are independent of the gas that is being measured, thus allowing measurements of mixed gases commonly found in chromatography. 2 Mass flow measurements are very accurate for specific gases and are not affected by temperature and pressure fluctuations.