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.

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M-200 SERIES ADJUSTABLE FLOW SWITCHES Adjustable Piston Flow Switch with Right Angle Flow

The M-200 Series is an adjustable flow switch with right-angle flow that comes in 3/8” and 1/2” port sizes and has a flow range of up to 19 L/min for water and 1,415 SLPM for air. The 3/4" port size option can achieve flow rates up to 37 L/min and 2,830 SLPM for air. This extremely accurate adjustable flow switch provides repeatability of 5% and has options for SPST and SPDT configurations.

The M-200 Series Adjustable Flow Switch has been engineered to monitor vital sample flow parameters for instrumentation in process control and inert blanket gasses. It is used as an auxiliary alarm monitor for flow meters and is ideally suited for applications when installed on a by-pass for determination of filter plugging. Infinite adjustment permits detection and signaling of very low fluid flows with the added capability of detection in high flows.


  • Field adjustable
  • Infinite flow range
  • High repeatability
  • Extremely sensitive
  • Minimum pressure drop
  • Position insensitive
  • Repeatability of 5%
  • Female NPT standard on flow switches providing small, compact design
  • All Malema Fixed Set Point Flow Switches can have their own customized set points calibrated at the factory before shipping
  • Standard pre-calibrated set point ranges on Malema Flow Switches are also available for immediate use and distribution
  • Malema application engineers are available for consultations to provide the best possible flow switch options and materials of construction to ensure compatibility
  • Configurations available for single-pole, single-throw (SPST) or single-pole, dual-throw (SPDT) allowing for flexibility different outputs for both the high and low set point
  • Special configurations and different materials of construction are available. Consult the factory for details


  • Gas and liquid analyzers, biomedical instruments, atmosphere furnaces, gas chromatographs, vacuum systems and industrial fluid lines
  • Protects expensive electronic equipment from coolant flow failure on:
    • Laser Heads • Welders • Power Supplies • High-Speed Spindles • X-Ray Tubes • Semiconductor Equipment • Portable Plasma Cutters/Tables
  • Helps assure proper lubrication flow to critical bearings or gears to prevent system downtime on:
    • Presses • Rotating Equipment • Conveyors • Machine Tools • Robotics
  • Helps ensure system integrity in processing and dispensing equipment on:
    • Water Purification and Filtering • Beverage Dispensing • Chemical Additives • Gas Sampling • Distilling • Car Wash Fluid Dispensing • Portable Chillers • Vacuum Furnaces • Induction Furnaces
  • Works just as well with gases as it does with liquids, including:
    • Hydrogen • Oxygen • Air • Nitrogen • Argon • Helium • and more


Model Port Size Flow Range Water Flow Range Air* Connection Type Available Materials Set Point Accuracy Repeatability Hystersis
M-200 3/8" 0.15 - 19 LPM (0.03 - 5 GPM) 28.5 - 1415 SLPM FNPT 316SS, Acrylic, Anodized Aluminum, Brass, PTFE ±10% maximum ±5% maximum 15% - 30%
3/4" 0.75 - 37 LPM (0.19 - 10 GPM) 56.5 - 2830 SLPM

* With applications featuring gases, ranges may vary