Dwyer MMF-50 Mini-Master Flowmeter
The Dwyer MMF-50 is a Mini-Master® Series MMF compact variable area flowmeter that reads 5 to 50 SCFH air directly on a 1-1/2 in. (38 mm) scale with ±10% FS accuracy. It has no valve, installs from the front of the panel with bezel-type mounting, and is rated to 50 psi and 125°F.
Specifications verified October 14, 2026 against the Dwyer Series MM catalog (pp. 250-251).
Best For
- Direct reading of 5 to 50 SCFH air on a 1-1/2 in. scale
- Air samplers and gas analyzers
- Pollution monitors
- Cabinet purging
- Medical equipment
- Front-of-panel installation where panel space is tight
Warranty
Dwyer warrants this product for one year from delivery to the buyer under its standard warranty, unless a product-specific warranty supplied with the product states another period.
Key Features
Direct-Reading 1-1/2 in. Scale
Reads 5 to 50 SCFH air directly with ±10% FS accuracy. Side printed scale graduations give an instant reading, and a white back on the flow tube makes the float easier to see.
Front-of-Panel Bezel Mounting
Installs from the front of the instrument panel: drill two 9/32 in. or 5/16 in. holes on 2-1/16 in. centers, insert the connector spuds and slide on the furnished spring retainers from the rear.
No Valve, 50 psi Rating
Without a valve the meter is rated to 50 psi (3.4 bar).
Compact Styrene Acrylonitrile Body
A compact meter ideal for measuring small volume air, with a body that needs minimal panel space.
1/4 in. OD Tube Connections
Push on rubber or plastic tubing, or connect metal or rigid plastic tubing with a double compression nylon tube union such as Dwyer A-328.
Durable Construction
Durable construction for long operation life, with precision molding for high repeatability.
ZOT Supply is an authorized distributor of Dwyer products.
Technical Specifications
| Specification | MMF-50 |
|---|---|
| Model | MMF-50 |
| Series | Mini-Master® Series MMF |
| Flow Range | 5 to 50 SCFH air |
| Range Number | 50 |
| Scale Length | 1-1/2 in. (38 mm) |
| Accuracy | ±10% FS |
| Service | Compatible gases and liquids |
| Temperature Limit | 125°F (51°C) |
| Pressure Limit | 50 psi (3.4 bar) |
| Valve | None |
| Body Material | Styrene acrylonitrile |
| Float | Stainless steel, black glass or nylon |
| Process Connection | 1/4 in. OD for push-on rubber or plastic tubing; connect to rigid tubing with compression fittings |
| Mounting | Bezel-type panel mounting from the front: two 9/32 in. or 5/16 in. holes on 2-1/16 in. centers, spring retainers furnished |
| Weight | 0.5 oz (14.17 g) |
| Accessory | A-328 double compression nylon tube union |
| Compliance | Meets the technical requirements of EU Directive 2011/65/EU (RoHS II) |
Frequently Asked Questions
What flow range does the Dwyer MMF-50 measure?
The MMF-50 reads 5 to 50 SCFH air directly on a 1-1/2 in. (38 mm) scale with ±10% FS accuracy.
What pressure and temperature is the Dwyer MMF-50 rated for?
It is rated to 50 psi (3.4 bar) and 125°F (51°C).
Does the Dwyer MMF-50 include a valve?
No. The MMF-50 has no valve. The MMF-50-PV adds a bottom mount valve and the MMF-50-TMV a top mount valve, both rated to 10 psi.
How is the Dwyer MMF-50 mounted?
It mounts from the front of the panel. Drill two 9/32 in. or 5/16 in. diameter holes on 2-1/16 in. centers, insert the connector spuds, then slide the two furnished spring retainers on from the rear and push on rubber or plastic tubing.
What tubing connects to the Dwyer MMF-50?
The connections are 1/4 in. OD for push-on rubber or plastic tubing. For metal or rigid plastic tubing, use compression fittings such as the Dwyer A-328 double compression nylon tube union.
What is the Dwyer MMF-50 made of?
The body is styrene acrylonitrile and the float is stainless steel, black glass or nylon.
- Series:
- MM
- Product Type:
- Variable Area Flowmeter
- Media:
- Air
- Flow Range:
- 5-50 SCFH
- Connection Type:
- Push-On Tubing
- Connection Size:
- 1/4 in. OD
- Body Material:
- Styrene Acrylonitrile
- Max Pressure:
- 50 psi
- Max Temperature:
- 125°F
- Accuracy:
- ±10% FS
- Valve:
- None
- NIST Calibration:
- Available
