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Series MM Mini-Master® Flowmeter
2" or 1-1/2" Scale, Configurable Valve Option
The Series MM Mini-Master® Flowmeters consists of two series of flowmeters suitable for both gas and liquid applications with advanced features at a low cost. The Series MMA is a 2" (51 mm) scale flowmeter that is user configurable with or without non-removable top or bottom front mounted metering valves. It is constructed from transparent nylon material providing high chemical resistance and is easily disassembled via the provided key for cleaning or reconfiguration. The Series MMF is a 1-1/2" (38 mm) scale compact flowmeter ideal for measuring small volume air. It features bezel type mounting that can be quickly installed from the front of the instrument panel.
Note: Only the MMA is available in the Product Configurator.
Product Applications
- Medical equipment
- Air samplers
- Gas analyzers
- Pollution monitors
- Chemical injectors
- Cabinet purging
Models & Ordering
Specifications
- MMA
- Service:
- Compatible gases and liquids.
- Wetted Materials:
- Body: Nylon 12; O-rings: Buna-N (optional materials available); Float: Black glass, K monel, stainless steel, tungsten carbide.
- Temperature Limit:
- 130°F (54°C).
- Pressure Limit:
- 100 psi (6.9 bar) with compression fitting. 50 psi (3.4 bar) with tubing clamp.
- Accuracy:
- ±4% FS.
- Process Connection:
- 5/16" OD for push on rubber or plastic tubing with provided spring tubing clamp. Connect to rigid tubing with double compression fitting.
- Weight:
- 1 oz (28.35 g).
- Agency Approvals:
- Meets the technical requirements of EU Directive 2011/65/EU (RoHS II).
- MMF
- Service:
- Compatible gases and liquids.
- Wetted Materials:
- Body: Styrene acrylonitrile; Float: SS, black glass, nylon; Valve: Polyurethane.
- Temperature Limit:
- 125°F (51°C).
- Pressure Limit:
- 50 psi (3.4 bar), Valve option: 10 psi (0.6 bar).
- Accuracy:
- ±10% FS.
- Process Connection:
- 1/4" OD for push on rubber or plastic tubing. Connect to rigid tubing with double compression fittings.
- Weight:
- 0.5 oz (14.17 g).
- Agency Approvals:
- Meets the technical requirements of EU Directive 2011/65/EU (RoHS II).
Features
- Low installation costs with easy mounting
- Long operation life with durable construction
- Precision molding enables high repeatability
- White back on the flow tube allows for better visibility of the float increasing reading accuracy
- Side printed scale graduations allows for instantaneous flow reading saving time
- Compact bodies require minimal panel space freeing valuable space
Options
- The Following Options are available on the MMF Series only:
-PV Metering Valve and Knob
-TMV Top Mounted Valve with Screwdriver Adjustment
Accessories
| Model Number | Description | Usually Ships* | Price | Order | |
|---|---|---|---|---|---|
 |
A-327 | 5/16" nylon tube union. | 1-2 Weeks | $10.50 | Order |
 |
A-328 | 1/4" nylon tube union. | 1-2 Weeks | $10.50 | Order |
 |
RKA | Regulator kit for RMA or VFA. | Next Day | $263.00 | Order |
|
RK-RMB | Regulator kit for RMB. | 1-2 Weeks | $263.00 | Order |
| 200672-00 | Hardware kit for MMA Flowmeter Series | 1-2 Weeks | $22.75 | Order |
Videos
Model Chart
| EXAMPLE | MMA | 3 | AT | Series MMA-3-AT Mini-Master® Flowmeter, range .5-2.5 SCFH air, with aluminum tag. |
| SERIES | MMA | Mini-Master® Flowmeter | ||
| RANGE | 2 3 4 5 6 7 8 9 10 19 20 21 22 23 24 25 26 27 30 31 32 33 35 36 37 38 40 41 42 |
.2-1.2 SCFH Air .5-2.5 SCFH Air .5-5 SCFH Air 1-10 SCFH Air 2-20 SCFH Air 5-50 SCFH Air 10-100 SCFH Air 20-200 SCFH Air 30-300 SCFH Air .1-.5 LPM Air .2-1.2 LPM Air .25-2.5 LPM Air .5-5 LPM Air 1-10 LPM Air 2.5-25 LPM Air 5-50 LPM Air 10-100 LPM Air 15-150 LPM Air 1-8 GPH Water 1-16 GPH Water 4-40 GPH Water 5-60 GPH Water 5-50 cc/min Water 10-150 cc/min Water 20-200 cc/min Water 50-500 cc/min Water .1-1.1 LPM Water .25-2.5 LPM Water .3-3.5 LPM Water |
||
| OPTIONS | AT LV NIST VIT |
Aluminum Tag Less Valve NIST Traceable Calibration Certificate Fluoroelastomer O-rings |
Product Literature
Manuals
Catalog Pages
Approvals
Drawings
Questions
- Question
- How are Dwyer flowmeters properly read?
- Answer
- The flow rate is read at the maximum width portion of the float regardless of shape.
- Question
- Is a Dwyer Certificate of Conformance offered with any of the flowmeter models?
- Answer
- A standard Dwyer Certificate of Conformance can be offered with all Dwyer Mini-Master®, Rate-Master®, and Visi-Float® flowmeters on all water ranges (or other compatible liquids).
- Question
- Why are top mounted valves recommended for flowmeters used for vacuum service?
- Answer
- To maintain atmospheric pressure in the indicating bore and therefore preserve accuracy; an inlet restriction would reduce pressure in the bore. This is essentially the opposite situation to outlet back-pressure in a pressure system which increases pressure in the bore and also affects accuracy. Remember that all standard Dwyer flowmeters are calibrated for standard atmospheric pressure and temperature in the bore.
- Question
- What factor is used to correct for different flowmeter inlet pressure?
- Answer
- If the flowmeter is exhausting to atmosphere, no correction factor is needed. If back-pressure is present due to downstream plumbing or restrictions, this error can be corrected utilizing the conversion curves in our full-line catalog or the following equation.
Pressure: Q2 = Q1 x √((P1 x T2)/(P2 x T1))
Where:
Q1 = Observed Flowmeter Reading
Q2 = Standard Flow Corrected for Specific Gravity
P1 = Actual Pressure (14.7 psia + Gage Pressure)
P2 = Standard Pressure (14.7 psia, which is 0 psig)
T1 = Actual Temperature (460 R + Temp °F)
T2 = Standard Temperature (530 R, which is 70°F)
- Question
- Which flowmeters are available with NIST traceability?
- Answer
- All Dwyer Mini-Master®, Rate-Master®, and Visi-Float® flowmeters are available with NIST traceability on all air ranges except for RMA-1, RMA-11, RMA-150, RMA-151, VFA-1, VFA-21 and VFB-60 models.
- Question
- What are wetted materials in following flow meter part numbers? Are they compatible with HCl? MMF-10-TMV MMF-10 MMF-2-TMV MMF-2 Is MMF available in 4or 5 SCFH full scale? What is ball material for these ranges above?
- Answer
- The Series MMF flowmeters have the following wetted materials: Body: Styrene Acrylonitrile Float: Stainless Steel, Black glass, Nylon Valve: Polyurethane For the -2 range, the ball material is 302 stainless steel. For the -10 range, the ball material is nylon. Unfortunately, these materials are not compatible with HCl. Also, the 4 or 5 SCFH range is NOT a standard range for the MMF. The -10 range number would be the logical choice to pick since the 4 or 5 SCFH range would be encompassed.
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