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                           "pH meters, pH probes, pH controllers and much more"

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Pumps: Metering and Transfer

Metering Pumps:  Diaphragm and Peristaltic

Diaphragm based pumps are used because they can deliver chemicals quantitatively to a process.  They can fit into a control scheme as either an ON-OFF device or as a PROPORTIONAL device.  We can provide either.  Based upon the requirements specified, we can offer a number of choices from several different manufacturers: Hanna Instruments, Blue-White, Hayward and LMI.  Some of the key factors are speed of pumping, pressure, viscosity, ON-OFF or Proportional dosing and capacity.  In addition special consideration must be given to delicate chemicals like polymers, since they can be damaged by improper pumping.  Polymer dilution for instance requires a special system. 

Blue-White Flex-Pro Advanced Peristaltic Pumps

The next generation in metering pumps are here.

 These pumps replace conventional diaphragm pumps with superior technology.  No more expensive diaphragm replacements and repair time. 


  • Variable speed brushless DC motor

  • Washdown, NEMA 4X (IP66)

  • Max feed rate 33.3 GPH (126 LPH)

  • Pressure up to 125 PSI (8.6 bar)

  • Continuous duty cycle

  • Scalable output signal to control other pumps or external devices
    (4-20 mA and pulsed output)

  • Multiple inputs:

    • 4-20 mA

    • 0-10 VDC

    • Pulsed

    • Batch (program trigger from 1 - 1,000 pulses)

    • Contact Closure (remotely turn the pump ON/OFF)
      Perfect for use with a PLC to control chemical feed!

    • Tube failure relay and more...

  • Automated parts per million dosing

  • Multiple contact closure outputs (3)

  • Programmable 10 amp relay

  • New feature to extend tube life

  • Intuitive, menu driven controls with large, high res., backlit LCD

  • Built-in diagnostics

  • Accuracy: +/- 0.5%
    Every pump is calibrated before it ships.

  • Repeatability: +/- 0.5%

  • Output adjustment: 1-100% in 0.1% increments (resolution)

  • 2 year warranty


Blue-White Peristaltic Pumps

Blue White Peristaltic Pump

These pumps are controlled with with an ON-OFF relay or with a proportional analog (4-20mA) signal.





  • 4 Digit LCD display with built in icons, such as:
            On-Time, Total-Time, TFD*, FVS, Alarm, Service...
  • Programmable timer:
            From .1 second up to 200 Days
  • Accepts Tube Failure Detection and FVS sensors
  • 1 Amp relay - alarm output
  • Input Modes:
             Manual, 4-20 mA, 0-10 VDC, Frequency, Pulses for batching operations.
  • One Shot Timer and Pulse Batch

Hanna Instruments Diaphragm Metering Pumps

Hanna Instruments BL PumpThe Blackstone Series of metering pumps features Teflon wetted parts.  Each pump has an adjustable speed control to allow for setting the proper dosage.  Typically these pumps are controlled remotely by a pH, ORP, conductivity or other ON-OFF process controller relay.  If cost is a factor in the system design, these pumps are a good choice.




Pharmaceutical Pumps

Ask us about our Ultra low proportional metering pumps for pharmaceutical applications.  Flows can be controlled to a very small fraction of a milli-liter per second.






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MBH Engineering Systems 2008
Last modified: 29-Oct-2008