ACCURACY/LINEARITY All models have a standard accuracy specification of ±1.5% F.S. (including linearity). NIST traceable calibration certificates are optional on all models. Models with 2nd and 3rd gases have an accuracy of ±3.0% F.S. for those gases.CALIBRATION GASES Units may be calibrated for virtually any clean, dry gas. Several standard gas selections are available as found in the Product Configurator. Contact the factory for calibration information on non-standard gases.DISPLAY An integrated 3.5 digit LCD display shows current flow rate in mL/minute or L/minute. For totalizing or other functions, check out McMillan's line of external remote displays.ELECTRICAL CONNECTIONS All units have a 36" (92 cm) output cable, terminated with either a 9-pin "D" connector, 15-pin "D" connector, or a 6-pin PS/2 style connector. An optional mating cable assembly, terminated with pigtail leads, is recommended to facilitate wiring.FLOW RANGES Flow ranges from 0-50 sccm up to 0-10,000 sccm are available. Consult the factory for custom requirements.FLUID CONNECTIONS All units have compression-type tube fittings as standard. Non-standard fittings and sizes may be available upon request or as found in the Product Configurator.POWER Units may be ordered for either 12 VDC or 24 VDC power. Various power adapters are available for use with 12 VDC versions.SIGNAL INPUTS & OUTPUTS Units allow user to select either internal or external setpoint control. Internal setpoint configured using potentiometers on front panel. All command and output signals are 0-5 VDC. External setpoint (command) signal is supplied with a remote 0-5 VDC source.WETTED MATERIALS All units feature metal construction. See specifications for detailed materials in gas path. Model 80 and 80D units are constructed from aluminum; Model 80S and 80SD units are stainless steel.