Malema Markets

Wherever safe, accurate, and repeatable flow control and measurement are required, you can find Malema solutions.

For over 40 years, Malema flow meters, flow controllers, flow switches, relief valves and pressure sensors have been utilized across various demanding applications. They offer high-purity performance in semiconductor production, safety in dangerous industrial environments and precision in hydrogen transportation applications.

Click on the markets below to learn which Malema flow control and measurement solutions can help you achieve your desired results.

View Our Markets

M-10000 PADDLEWHEEL FLOW METER Positive Displacement Tangential Turbine Flow Meter

Paddlewheel Flow Meters (or tangential turbine flow meters) are among the most common ways to measure flow electronically in many applications. With the enhanced M-10000 Series Paddlewheel Flow Meter, Malema produced a flow-sensing device that is smaller, easier to install, and more accurate than ever before by utilizing sophisticated circuitry to foster signal conditioning. This positive displacement flow meter comes in five sizes (1/4” to 1”) and features optional outputs such as 4-20 mA, 0-10 VDC, or pulse. One added feature of the M-10000 Paddlewheel Flow Meters is that it can also be used as an adjustable flow switch to monitor increasing or decreasing flow based on set points.

Additionally, the M-10000 Paddlewheel Flow Meter is highly configurable based on your application requirements. Each component is available in many construction materials, both metal and plastic, and the unit can be designed for specific chemical compatibility if needed.

Malema welcomes the opportunity to design special requirements for our M-10000 Paddlewheel Flow Meters, such as ports, extreme temperature and pressure capabilities and more. Malema also designs custom manifolds for customers with special requirements.


  • Wide flow range
  • Outstanding accuracy
  • State-of-the-art electronics -- high reliability
  • 4-20 mA, 0-10 VDC, or pulse output
  • Visual indication
  • Adjustable flow switch -- built in
  • Small footprint
  • All-PTFE models available (except for ceramic or sapphire shaft)
  • Flare Tube Connections Available


  • Cooling systems
  • Laser equipment
  • Wet process systems
  • CVD, CMP, and lithography tools
  • Corrosive chemical distribution


Product Specifications

Sizes Offered
  • 3/8", 1/2", 3/4", 1"
M-10000 Operating Ranges:
  • 1/4" FNPT - 0.1 - 1 l/min, 0.3-3 l/min,
    0.5 - 5 l/min
  • 3/8" FNPT - 1-10 l/min, 2-20 l/min,
    3-30 l/min
  • 1/2" FNPT - 4-40 l/min, 5-50 l/min
  • 3/4" FNPT - 20-115 l/min
  • 1" FNPT - 38-225 l/min
  • ± 0.5%*
  • ± 5% of full scale*
Pressure Drop
  • < 1 psi maximum (0.07 bar), except 1/4" units, which are 3 psi maximum (0.2 bar)
Operating Pressure
  • 100 – 300 psi**
Power Supply
  • Voltage Output Model - 12-24 V DC +10% 50 mA
  • 4-20 mA Output Model - 24 V DC +10%
  • 2 Form CDPDT Relay:
  • * 60 watts maximum
  • * 2A at 30 V DC resistive
Electrical Connections
  • 2 Belden cables, 18" wire pigtails:
  • * 2 wire cable for power and ground
  • * 5 wire cable for NO, NC, relay common, signal output and signal common.
  • Customers wiring can be brought directly to terminal blocks on the PCB
  • Custom connections available on request
Signal Outputs
  • Voltage: 0-10 V DC analog output (span - adjustable to 0-5 V DC)
  • Current: 4-20 mA span adjustable output; maximum external bad:1K ohm
  • Pulse Train

For additional specification details, please refer to the product data sheet located in the documentation tab of this web page.
* Accuracy and repeatability is based on room temperature DIW calibration
** Depending on component materials