Model 50D
Quick Ship Units come standard with:
- Aluminum Body Construction
- 15 VDC power configuration
- Acetal Tube Fittings
- Calibrated for Air
- 6-pin mini-DIN connector
- Display mL/sccm/L engineering Units
McMillan Model 50D Thermal Mass FLO-METERS are capable of measuring virtually any clean,dry gas as low as 0-20 sccm or as high as 0-500 Lpm! 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 50D Series FLO-METERS are suitable for a wide variety of industrial, commercial, laboratory and O.E.M. applications.
An integrated display reports flow in either mL/minute or L/minute. An analog output is also provided for remote data logging.
A cable assembly or power adapter is required for operation.
Model 50D Features & Options
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.
Fitting Chart
Zero Stability
Typical Pressure Drop
Specifications
- Accuracy (including linearity, best fit straight line):
- ±1.5% Full Scale (10-100% rated flow)
- Repeatability:
- ±0.25% Full Scale (10-100% rated flow)
- Pressure Rating:
- 150 psig (10.3 bar)
- Pressure Sensitivity:
- ±0.02% Full Scale per psi (per 69 mbar)
- Temperature Rating (Environment):
- Operating: 5 to 55ºC
Storage: 0 to 70ºC - Temperature Sensitivity:
- ±0.2% F.S. or less per ºC
- Body Leak Integrity (not including fittings):
- Model 50D: 1 x 10-7 sccs of He
- O-Ring Material:
- Viton
- Fitting Material:
- Acetal
- Recommended Filtration:
- 20 microns or less
- Compatible Gases:
- Clean, dry gases compatible with wetted materials. Calibrated with air.
- Output Signal:
- Minimum 2.5K ohm load
Not isolated - Warm-Up Time:
- Less than 5 minutes
- Integrated Display:
- Model 50D: 3.5 digit LCD flow rate display
- Typical Power Consumption:
- 12VDC @ 150 mA (12.5-15VDC)
- Peak Power Comsumption:
- 12VDC @ 300 mA (12.5-15VDC)
- Electrical Connections:
- Integrated 36" (92 cm) cable, terminated with 6-pin Mini-DIN (PS/2 Style)
- Settling Time:
- Typically <1 second for 97% of final value
- Reliability:
- 100,000 Hours MTBF (testing ongoing)
- Approvals/Certifications:
- CE Approved
89/336/EEC (EN 55011 & EN 50082-1)
73/23/EEC Low Voltage Directive - Ratings:
- NEMA 1 (IP10)
- Warranty:
- Model 50D: 1 Year Limited
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