Application Information
 
 
 
  Paddlewheel MW 100 Flow Meter  
 
Mini-Wheel Flowmeter with In-line Flow
Tangential turbine flow meters continue to be the most common way to measure flow electronically in a wide range of industries. Enhancements to tangential turbine flow meter systems are producing a flow-sensing device that is smaller, easier to install, and more accurate than ever before. Malema manufactures a line of Tangential Turbine (also called Paddle Wheel) Flow meters that utilize sophisticated circuitry to foster signal conditioning.
 
     
 
The rotational velocity of the rotary wheel varies linearly with the average velocity of the fluid flowing through the flow meter. A square wave pulse is generated by a Hall Effect from magnets embedded in the vanes of the rotor wheel. Depending on the output version of the MW-100, the pulse signal is relayed directly, converted to a 0-5 VDC (voltage) output. The voltage model is span-adjustable over the flow range of the unit.


Standard Specifications

Connection Size Measuring range
1/4” FNPT or Rc 0.6 to 5 L/min
3/8” FNPT or Rc 1.0 to 20 L/min

 

 
 
     
 
  Paddlewheel M 10001 Flow Meter  
     
 
Low Flow Paddlewheel Flowmeter
• Very low flow sensitivity
• State-of-the-art electronics -- high reliability
• 4-20 mA, 0-10 VDC, or pulse output
• Adjustable flow switch -- built in
• Small foot print
• For liquids only
• Repeatability ± 0.5%



Standard Specifications

Port Size Range Code Range (GPM) Range (L/min)
1/4" 01 0.006-0.053 0.022-0.200
1/4" 02 0.008-0.08 0.03-0.3
 
 
     
 
     
  Paddlewheel M 1000 Flow Meter  
 
Paddle Wheel flow meters have an outstanding accuracy and wide flow range capability. These are tangential turbine type and with state of art electronics have very high reliability. These have a built in adjustable flow switch which can be used to modify supply lines based on specific applications. Ideal for fuel cell and other microflow applications, these are made with different materials based on use of customer.
 
     
 
Standard Specifications
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
Repeatability + 0.5%
Pressure Drop < 1 psi maximum (0.07 bar), except 1/4" units, which are 3 psi maximum (0.2 bar)
Materials Available 316 SS, Teflon, Brass, Celcon, PVDF
Mounting Horizontal or vertical mounting; axis of rotor should be parallel to the ground
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