McMillan Model 50X Series Thermal Mass Flow Meters Compressor
McMillan Model 50X Series Thermal Mass Flow Meters Compressor
McMillan Model 50X Series Mass Flow Meters are capable of measuring virtually any
clean, dry gas as low as 0-20 sccm or as high as 0-500 L/minute. Repeatable results are achieved using a patented thermal mass flow sensor design. This proven design minimizes zero drift while maintaining fast response and linear outputs.
Because of the compact size and economical cost of these products, the Model 50X Series Mass Flow Meters are
suitable for a wide variety of industrial, commercial, laboratory and O.E.M. applications.
| Model 50K | Model 50D | Model 50S | Model 50SD | |
| Accuracy | ±1.5% Full Scale* | |||
| Repeatability | ±0.25% Full Scale* | |||
| Pressure Rating | 150 psig (10.3 bar) | 500 psig (34.5 bar) | ||
| Pressure Sensitivity | ±0.02% Full Scale* per psi (per 69 mbar) | |||
| Temperature Rating | Operating Range: 10 to 50ºC ; Storage Range: 0 to 70ºC | |||
| Temperature Sensitivity | ±0.15% F.S.* or less per ºC | |||
| Body Leak Integrity | 1 x 10-7 sccs of He | |||
| Wetted Materials | Aluminum | 303 Stainless Steel | ||
| 304 Stainless Steel | 304 Stainless Steel | |||
| 316 Stainless Stee | 316 Stainless Steel | |||
| O-Ring Material | Viton® | N/A | ||
| Fitting Material | Choose from acetal, brass, or stainless steel | |||
| Recommended Filtration | 20 microns or less | |||
| Compatible gases | Clean, dry gases compatible with wetted materials | |||
| 0-5 VDC Output Signal | Minimum 2.5 Kohm load | |||
| 4-20 mA Output Signal | Maximum 300 ohm loop resistance | |||
| Warm-Up Time | Less than 5 minutes | |||
FLOW RANGES
Flow ranges from 0-20 sccm up to 0-500 L/minute are available. Consult the factory for custom requirements.
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 INPUTS & OUTPUTS
Choose from either 0-5VDC or 4-20mA linear outputs.
ACCURACY/LINEARITY
All models have a standard accuracy specification of ±1.5% F.S. accuracy (including linearity). NIST traceable calibration certificates are optional on some models.
FLUID CONNECTIONS
All units have compression-type tube fittings as standard.
Consult Fitting Availability Chart for available materials and sizes.
ELECTRICAL CONNECTIONS
All units have a 36” (92 cm) output cable, terminated with a 6-pin PS/2 style connector. An optional mating cable assembly, terminated with pigtail leads, is recommended to facilitate wiring.
WETTED MATERIALS
All units feature metal construction. See specifications for detailed materials in gas path. Model 50S and 50SD feature stainless steel construction; other models constructed from aluminum.
DISPLAYS
For units with integrated displays, choose the Model 50D or 50SD. Units for ranges 2-7 will display flow in cc/min, and ranges 8-15 will display flow in L/min. Units without integrated displays may be used with McMillan’s line of external remote displays. Please request additional information from factory on remote displays available.
CALIBRATION GASES
Units may be calibrated for virtually any clean, dry gas. Several non-standard gas selections are available as indicated in Ordering Information. Contact factory for calibration information on non-standard gases.
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