Analog Gas Flow Controller - Model 204A

204A Parker 200 Series MFCs accurately measure and control flow rates of a wide variety of gases from 5 sccm to 1000 SLPM full scale nitrogen flow for operating pressures up to 3000 PSIG.  The MFCs provide a linear flow signal output proportional to a calibrated flow rate.

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Model 204A: Mass Flow Instruments

Parker Mass Flow products reflect over four decades of experience in the design and manufacture of precision instruments for the measurement and control of gas flow. They incorporate design principles that are simple and straightforward, yet flexible enough to operate under a wide variety of process parameters. The result is flowmeters, flow controllers and control valves that are accurate, reliable and cost-effective solutions for many gas flow applications in the analytical, process, chemical/petrochemical, environmental, biopharmaceutical and research markets.

The 200 series is the lastest evolution of the original Parker Analog MFC. With thousands installed worldwide, they are the proven solution when cost effective high performance gas flow control is the goal. The 100 Series Mass Flow Meters are available for applications where flow measurement only is required.

Flow Capacity

Any Flow range from 0-500 SLPM to 0-1000 SLPM (nitrogen equivalent).
Response Time (per SEMI E17-91 Settling Time)
1 to 2 Seconds
Accuracy and Linearity
±1% full scale
Within ±0.2% full scale at any constant temperature within operating temperature range
Rangeability (Control Range)
50; 1 (2%-100% full scale) (accuracy and control)
Ambient and Operating Temperature Range
-10 to 70 °C ( ±14 to 158 °F)
Maximum Operating Pressure
200 PSIG
Temperature Coefficent (per SEMI E18-91 Zero Effect and Span Effect)
±0.05% full scale / °C of zero ±0.05% of reading/ °C of span
Mounting Orientation
Attitude insensitive

Warm-up Time
10 minutes
External Electrical Connector
Nine (9)- pin Dconnector
Weight (approximate)
10.9 lbs
Power Supply Requirements
(Current consumption <250 mAdc):
Voltage output models: +12 (±5%) (0-5 Vdc & 1-5 Vdc flow signal outputs only) or +15 (±10%) Vdc
Current loop models: +15 (±5%) or +24 (±15%) Vdc
Setpoint Input/Flow Signal Output
0-5 Vdc/0-5 Vdc (2K ohm minimum load resistance)
0-10 Vdc/0-10 Vdc (3K ohm minimum load resistance)
1-5 Vdc/1-5 Vdc (2K ohm minimum load resistance)
4-20 mAdc/4-20mAdc (refer to load resistance values below)
1-5 Vdc/4-20 mAdc (refer to load resistance values below)
Load resistance values for 4-20 mAsc flow signal output
0-450 ohm for 6.5-15 Vdc loop supply voltage
200-750 ohm for 15-30 Vdc loop supply voltage

316 Stainless Steel
Sensor Assembly
316L Stainless Steel
316 Stainless Steel
Valve Components (Wetted)
302 Stainless Steel, 316 Stainless Steel, 430F Stainless Steel and Sandvik® 1802
Elastomers (O-rings and Valve Seat)
Buna N or Viton®
Process Connections
316 Stainless Steel

Sandvik® - AB Sandvik Materials Technology
Kalrez®, Viton® - DuPont Dow Elastomers L.L.C.
Specifications subject to change

To order, please specify
• Model number
• Type of output signal
• Elastomer material
• Process connection size and type
• Flow capacity
• Gas type
• Operating temperature
• Inlet (supply) pressure
• Outlet pressure
• Calibration standard (i.e. 0°C, 20°C, 21.1°C or 25°C)
• Additional accessories required

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