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-2111 ULTRASONIC FLOW METER High Purity Ultrasonic Flow Meter With U- or Z-Shaped PFA Tube and Signal Converter

The Malema M-2111 Series Ultrasonic Flow Meter handles a wide range of flow rates and connection sizes. It consists of a Flow Detector and a Signal Converter. All the wetted parts are made of high-purity PFA. There are no mechanical seals or moving parts. The flow detector has non-contact transducers and a flow tube design without dead pockets. The M-2111 Ultrasonic Flow Meter is an ideal choice in the semiconductor industry, where extreme cleanliness and anti-corrosiveness are required.

Features

  • Accuracy ± 1% of reading
  • Repeatability ± 0.5% of reading
  • All wetted parts made of New PFA (AP-211SH)
  • Contamination free from ions or particles
  • Corrosion resistant, no metal parts
  • Wide rangeability of 100:1 (Typical)
  • Easy installation with compact meter body
  • Low flow measurements down to 2 mL/min
  • Measures viscous fluids
  • Ease of parameter configuration through front panel LCD and Keypad, or PC communication software

Applications

  • CMP, ECD, Electroless Deposition, Wet Clean and Track tools in semiconductor manufacturing
  • Solar PV equipment
  • Medical Devices
  • Wet process / Chemical distribution systems
  • Laser equipment
  • Cooling systems

Specifications

Operation Specifications

Measurable Fluid Liquids
Speed of Sound in Fluid 1000 to 2200 m/s
Fluid Temperature 10°C - 60°C*
Fluid Pressure 0 to 70 psig
Fluid Kinematic Viscocity 0.8x10-6 m2/s to 4.5x10-5 m2/s**
Process Connection PFA Tube End***
Enclosure Classification IP65

* Consult factory for higher temperature applications
** Consult factory for higher viscocity applications
*** Consult factory for other process connections

Material Specifications

Part Name Material
Wetted Part Body PFA
Tube PFA
Housing (Size 10/15/20) PTFE
End Cap (Size 04/06) PP
Cable Fitting PP
Cable Jacket PU

Performance Specifications

Range Code Flow Range (L/min) Connecting Tube Size Accuracy Repetability Pressure Loss Factor (K)
4 0 - 3.0 1/4" or 3/8" ± 5 ml/min below 500 ml/min* ± 1% of reading above 500 ml/min ± 0.5 ml/min below 100 ml/min* ± 0.5% of reading above 100 ml/min 3.04
6 0 - 8.0 3/8" ± 12 ml/min below 1200 ml/min ± 1% of reading above 1200 ml/min ± 3 ml/min below 600 ml/min* ± 0.5% of reading above 600 ml/min 0.0537
10 0 - 20.0 1/2" ± 0.047 l/min below 4.7 l/min ± 1% of reading above 4.7 l/min ± 0.024 l/min below 4.7 l/min ± 0.5% of reading above 4.7 l/min 0.0625
15 0 - 50.0 3/4" ± 0.106 l/min below 10.6 l/min ± 1% of reading above 10.6 l/min ± 0.053 l/min below 10.6 l/min ± 0.5% of reading above 10.6 l/min 0.012
20 0 - 80.0 1" ± 0.188 l/min below 18.8 l/min ± 1% of reading above 18.8 l/min ± 0.094 l/min below 18.8 l/min ± 0.5% of reading above 18.8 l/min 0.00377

Electrical Specifications

Analog Output Current O/P:
Active: 4 to 20 mA (Max. Load < 900 ohms)
Passive: 4 to 20 mA (Max. Load < 1200 ohms @ 30 V max.)
Voltage OP: 0 to 10 Vdc (min. impedance < 10 K)
Pulse Output Open Collector (sinking)/Max. 30 Vdc, 200 mA max.
Pulse (Hz) - 10 KHz max, Configurable
Pulse (Volume) - Pulse weight configurable from 0.1 mL
Digital Output Open Collector / Max. 30 Vdc, 200 mA max.
Two digital outputs configurable for:
Low flow rate/High flow rate/Totalizer greater than/Totalizer less than/Signal Strength less/Positive totalizer pulse
LED Alarm indication
Digital Input Zeroing - Momentarily pull-up to 24Vdc for activation
Totalizer Reset - Contact closure or Vdc pull-up (5 Vdc max)
Power Supply 24 Vdc ± 10%
Power Consumption 3.6W/Approx. 150 mA (Continuous)
Max. 0.25 A, surge Current
Digital Communication Modbus Over RS485

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