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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VF SERIES VORTEX FLOW METERS PFA or PPS Inline Vortex Flow Meters with Integrated Electronics

An inline flow sensor and electronics are combined into one unit to create the VF-8100 and VF-8200 Vortex Flow Meters. Using ultrasonic sensing technology to measure flow rate, the Vortex Flow Meters come in multiple sizes and feature no mechanical seals or moving parts. The VF-8100 features PFA-wetted materials, which are ideal in the semiconductor industry for applications requiring corrosion-resistant wetted parts, high purity, and a minimal footprint. With PPS-wetted materials, the VF-8200 is appropriate for industrial settings that do not require high-purity flow meter solutions. Both models of the Vortex Flow Meters come in 3/8” 1/2”, 3/4” and 1” sizes and have a flow range of up to 100 l/min for the VF-8100 and 150 l/min for the VF-8200.


  • Straight tube sensor design with a compact footprint
  • PFA wetted materials for the VF-8100
  • PPS wetted materials for the VF-8200
  • No moving parts for reliability and durability
  • Simple construction ensures low-pressure loss and low liquid leak
  • Vortex detector does not contact the fluid
  • Available in sizes of in ⅜” ½”, ¾” and 1”
  • Flow range of up to 100 l/min for the VF-8100 and 150 l/min for the VF-8200


  VF-8100 Vortex
Featuring PFA Wetted Materials
VF-8200 Vortex
Featuring PPS Wetted Materials
Accuracy ±2% of Full Scale ±2% of Full Scale
Repeatability Within ±0.5% of Full Scale Within ±0.5% of Full Scale
Temperature Ambient: 0 - 50°C | Fluid: 0 - 90°C Ambient: 0 - 50°C | Fluid: 0 - 90°C
Operating Pressure 100 psig (max.) 100 psig (max.)
Flow Range 0.4 - 100 l/min 0.5 - 150 l/min
Sizes 3/8", 1/2", 3/4", 1" 3/8", 1/2", 3/4", 1"

Electrical Specification

Power Supply
  • Voltage Output: 12 to 24 VDC
  • Current Output: 24 VDC
  • Pulse Output: 3.8 to 24 VDC
Current Draw
  • 50 mA Max

For additional specification details, please refer to the product data sheet located in the documentation tab of this web page.


Product Sheets