Name: Model 50D/50K/50S/50SD Gas Mass Flow Meters
SKU: Model 50D/50K/50S/50SD
Availability: InStock

Select model:
50D | 50K | 50S | 50SD

Model 50D

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.

Model 50K

McMillan Model 50K Thermal Mass FLO-SENSORS 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 50K Series FLO-SENSORS are suitable for a wide variety of industrial, commercial, laboratory and O.E.M. applications.

An integrated analog output reports flow rate in VDC proportional to flow rate.

A cable assembly or power adapter is required for operation.

50K 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

DISPLAYS

For units with integrated displays, consider the Model 50D or 50SD. Units without integrated displays may be used with McMillan’s line of external remote displays.

ELECTRICAL CONNECTIONS

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.

Model 50S

McMillan Model 50S Thermal Mass FLO-SENSORS are capable of measuring virtually any clean, dry gas as low as 0-20 sccm or as high as 0-100 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 50S Series FLO-SENSORS are suitable for a wide variety of industrial, commercial, laboratory and O.E.M. applications.

An integrated analog output reports flow rate in VDC proportional to flow rate.

A cable assembly or power adapter is required for operation.

50S 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

DISPLAYS

For units with integrated displays, consider the Model 50D or 50SD. Units without integrated displays may be used with McMillan’s line of external remote displays.

ELECTRICAL CONNECTIONS

FLOW RANGES

Flow ranges from 0-20 sccm up to 0-100 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.

Model 50SD

McMillan Model 50SD Thermal Mass FLO-METERS are capable of measuring virtually any clean, dry gas as low as 0-20 sccm or as high as 0-100 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 50SD Series FLO-METERS are suitable for a wide variety of industrial, commercial, laboratory and O.E.M. applications.

Stainless steel construction and standard metal fittings provide reliable service for most applications.

An integrated display, showing flow rate in mL/minute or L/minute, is combined with an analog output for data recording.

A cable assembly or power adapter is required for operation.

50SD 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

DISPLAYS

ELECTRICAL CONNECTIONS

FLOW RANGES

Flow ranges from 0-20 sccm up to 0-100 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):: Model 50D: ±1.5% Full Scale (10-100% rated flow)
Model 50K: ±1.5% Full Scale (10-100% rated flow)
Model 50S: ±1.5% Full Scale (10-100% rated flow)
Model 50SD: ±1.5% Full Scale (10-100% rated flow)
Repeatability:: Model 50D: ±0.25% Full Scale (10-100% rated flow),
Model 50K: ±0.25% Full Scale (10-100% rated flow) ,
Model 50S: ±0.25% Full Scale (10-100% rated flow) ,
Model 50SD: ±0.25% Full Scale (10-100% rated flow),
Pressure Rating:: Model 50D: 150 psig (10.3 bar)
Model 50K: 150 psig (10.3 bar)
Model 50S: 500 psig (34.5 bar)
Model 50SD: 500 psig (34.5 bar)
Pressure Sensitivity:: Model 50D: ±0.02% Full Scale per psi (per 69 mbar)
Model 50K: ±0.02% Full Scale per psi (per 69 mbar)
Model 50S: ±0.02% Full Scale per psi (per 69 mbar)
Model 50SD: ±0.02% Full Scale per psi (per 69 mbar)
Temperature Rating (Environment):: Model 50D: Operating: 5 to 55ºC
Storage: 0 to 70ºC

Model 50K: Operating: 5 to 55ºC
Storage: 0 to 70ºC

Model 50S: Operating: 5 to 55ºC
Storage: 0 to 70ºC

Model 50SD: Operating: 5 to 55ºC
Storage: 0 to 70ºC
Temperature Sensitivity:: Model 50D: ±0.15% F.S. or less per ºC Model 50K: ±0.15% F.S. or less per ºC Model 50S: ±0.15% F.S. or less per ºC Model 50SD: ±0.15% F.S. or less per ºC
Body Leak Integrity (not including fittings):: Model 50D: 1 x 10-7 sccs of He Model 50K: 1 x 10-7 sccs of He Model 50S: 1 x 10-7 sccs of He Model 50SD: 1 x 10-7 sccs of He
Wetted Materials:: Model 50K: Aluminum
304 Stainless Steel
316 Stainless Steel

Model 50S: 303 Stainless Steel
304 Stainless Steel
316 Stainless Steel
Epoxy

Model 50SD: 303 Stainless Steel
304 Stainless Steel
316 Stainless Steel
Epoxy
O-Ring Material:: Model 50D: Viton
Model 50K: Viton
Model 50S: None
Model 50SD: None
Fitting Material:: Model 50D: Choose from acetal, brass, or stainless steel
Model 50K: Choose from acetal, brass, or stainless steel
Model 50S: Choose from acetal, brass, or stainless steel
Model 50SD: Choose from acetal, brass, or stainless steel
Recommended Filtration:: Model 50D: 20 microns or less
Optional inline filters available

Model 50K: 20 microns or less
Optional inline filters available

Model 50S: 20 microns or less
Optional inline filters available

Model 50SD: 20 microns or less
Optional inline filters available
Compatible Gases:: Model 50D: Clean, dry gases compatible with wetted materials
Model 50K: Clean, dry gases compatible with wetted materials
Model 50S: Clean, dry gases compatible with wetted materials
Model 50SD: Clean, dry gases compatible with wetted materials
Output Signal:: Model 50D: Minimum 2.5K ohm load
Not isolated

Model 50K: Minimum 2.5K ohm load
Not isolated

Model 50S: Minimum 2.5K ohm load
Not isolated

Model 50SD: Minimum 2.5K ohm load
Not isolated

Model 50SD: Minimum 2.5K ohm load
Not isolated
Warm-Up Time:: Model 50D: Less than 5 minutes Model 50K: Less than 5 minutes Model 50S: Less than 5 minutes Model 50SD: Less than 5 minutes
Integrated Display:: Model 50D: 3.5 digit LCD flow rate display Model 50K: None Model 50S: None Model 50SD: 3.5 digit LCD flow rate display
Typical Power Consumption:: Model 50D: Standard: 12VDC @ 150 mA (12.5-15VDC)
E Suffix: 24VDC @ 80 mA (22-25VDC)

Model 50K: Standard: 12VDC @ 150 mA (12.5-15VDC)
E Suffix: 24VDC @ 80 mA (22-25VDC)

Model 50S: Standard: 12VDC @ 150 mA (12.5-15VDC)
E Suffix: 24VDC @ 80 mA (22-25VDC)

Model 50SD: Standard: 12VDC @ 150 mA (12.5-15VDC)
E Suffix: 24VDC @ 80 mA (22-25VDC)
Peak Power Consumption:: Model 50D: Standard: 12VDC @ 300 mA (12.5-15VDC)
E Suffix: 24VDC @ 160 mA (22-25VDC)

Model 50K: Standard: 12VDC @ 300 mA (12.5-15VDC)
E Suffix: 24VDC @ 160 mA (22-25VDC)

Model 50S: Standard: 12VDC @ 300 mA (12.5-15VDC)
E Suffix: 24VDC @ 160 mA (22-25VDC)

Model 50SD: Standard: 12VDC @ 300 mA (12.5-15VDC)
E Suffix: 24VDC @ 160 mA (22-25VDC)
Electrical Connections:: Model 50D: Integrated 36" (92 cm) cable, terminated with:

Standard: 6-pin Mini-DIN (PS/2 Style)

D1 Option: 9-pin D-Sub male

D2 Option: 15-pin D-Sub male

Model 50K: Integrated 36" (92 cm) cable, terminated with:

Standard: 6-pin Mini-DIN (PS/2 Style)

D1 Option: 9-pin D-Sub male

D2 Option: 15-pin D-Sub male

Model 50S: Integrated 36" (92 cm) cable, terminated with:

Standard: 6-pin Mini-DIN (PS/2 Style)

D1 Option: 9-pin D-Sub male

D2 Option: 15-pin D-Sub male

Model 50SD: Integrated 36" (92 cm) cable, terminated with:

Standard: 6-pin Mini-DIN (PS/2 Style)

D1 Option: 9-pin D-Sub male

D2 Option: 15-pin D-Sub male
Settling Time:: Model 50D: Typically <1 second for 97% of final value
Model 50K: Typically <1 second for 97% of final value
Model 50S: Typically <1 second for 97% of final value
Model 50SD: Typically <1 second for 97% of final value
Reliability:: Model 50D: 100,000 Hours MTBF (testing ongoing)
Model 50K: 100,000 Hours MTBF (testing ongoing)
Model 50S: 100,000 Hours MTBF (testing ongoing)
Model 50SD: 100,000 Hours MTBF (testing ongoing)
Approvals/Certifications:: Model 50D: CE Approved
89/336/EEC (EN 55011 & EN 50082-1)
73/23/EEC Low Voltage Directive

Model 50K: CE Approved
89/336/EEC (EN 55011 & EN 50082-1)
73/23/EEC Low Voltage Directive

Model 50S: CE Approved
89/336/EEC (EN 55011 & EN 50082-1)
73/23/EEC Low Voltage Directive

Model 50SD: CE Approved
89/336/EEC (EN 55011 & EN 50082-1)
73/23/EEC Low Voltage Directive
Ratings:: Model 50D: NEMA 1 (IP10)
Model 50K: NEMA 1 (IP10)
Model 50S: NEMA 1 (IP10)
Model 50SD: NEMA 1 (IP10)
Warranty:: Model 50D: 1 year limited Model 50K: 1 year limited Model 50S: 1 year limited Model 50SD: 1 year limited

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Additional information

Weight	1 kg

Model 50D/50K/50S/50SD Gas Mass Flow Meters