ACCURACY/LINEARITY All models have a standard accuracy specification of ±1.5% F.S. accuracy (including linearity). NIST traceable calibration certificates are optional on all models.CALIBRATION GASES Units may be calibrated for virtually any clean, dry gas. Several standard gas selections are available as indicated in the Product Configurator. Contact factory for calibration information on non-standard gases.DISPLAYS A 3.5 digit LCD flow rate display is integrated, which displays current flow rate in either mL/minute or L/minute. The display angle may be adjusted. If totalizing or other functions are required, consider 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 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 0-20 sccm up to 0-500 L/minute are available. Consult the factory for custom requirements.FLUID CONNECTIONS All units have compression-type tube fittings as standard. Consult the Product Configurator for available materials and sizes.POWER Units may be ordered to operate with either 12 VDC or 24 VDC power. Various power adapters are available for use with 12 VDC versions.SIGNAL OUTPUTS All integrated output signals are 0-5 VDC. An external module may be ordered to provide 4-20 mA output in addition to the integrated 0-5 VDC output.WETTED MATERIALS All units feature metal construction. See specifications for detailed materials in gas path. 50S and 50SD units feature stainless steel construction; 50K and 50D units are constructed from aluminum.