




Dwyer Instruments MFS-21 | Magnetic flow sensor | Range 0.5 to 10.5 GPM (2 to 40 LPM) | 3/8 I.D. | 1/2" NPT process connection | Frequency output signal
The compact, 316 SS body, in-line flowmeters with pulse and optional analog 4–20 mA output are called Model MFS-21 Magnetic Inductive Flow Sensors. It is offered with process connection sizes of 1/2" and 1" NPT and flow ranges of 0.25 to 52.8 GPM (1 to 200 LPM).

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- Specifications
- Features
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Accuracy | +/-2% of reading |
Connection | Electrical: Plug connector M12x1 |
Connection | Process: 1/2" NPT |
Current consumption [mA] | Max 80 mA |
Enclosure Rating | NEMA 4 (IP65) |
Flow Indication | LED green, flow proportional blinking |
Loop Resistance | 250 ¢ž¦ |
Manufacturer | Dwyer Instruments |
Material | Wetted: Electrodes: 316 SS Process connections: MFS: 316 SS Measuring pipe: MFS: PEEK-GF30 Gasket: EPDM |
Maximum Operating Pressure | MFS: 232 psi (16 bar) |
Maximum operating temperature | Process: 32 to 194°F (0 to 90°C) Ambient: 41 to 158°F (5 to 70°C) |
Minimum Conductivity of Medium | 50 µS/cm |
Output | Frequency: Square-wave, NPN or PNP Analog: 4-20 mA |
POWER CONSUMPTION | 0.6 W |
Power | 24 VDC +/-10% |
Range | 0.5 to 10.5 GPM (2 to 40 LPM) |
Repeatability | 1% |
Response Time | < 500 ms |
Type | Magnetic Flow Sensor |
Weight | 1.7 lb (0.77 kg) |
- Long lifespan without any wear and tear on the working parts.
- Can be used in situations when the flow has no mechanical components and the media is polluted.
- Low pressure drop is produced by a pipe cross-section devoid of obstructions.
- Not impacted by variations in concentration, density, viscosity, or temperature.
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