Introducing the new MDP-11

 

The 3-in-1 microinjector provides continuous microflow, rapid micro-dosing, microinjection, micro-suction, rapid sampling, and mixing with a footprint of just 3.5” by 4.5”. Applications that traditionally require two or three separate laboratory devices can now be replaced with this single piezoelectric micro-dosing pump.

 

The problem with traditional pumps

 

Traditional peristaltic pumps employ standard electromagnetic motors to provide a measured level of dispensing volume and flow rate. Further reduction of dispensing volume and flow rate is achieved by installation of a gearhead/reducer.

One of the drawbacks in introducing a reducer in such a system is that it creates inferior flow dynamics caused by factors such a hysteresis and backlash, and poor resolution/precision. These problems are particularly noticeable when a very slow flow/step rate is desired, often resulting in a limitation of the range of flow rate to just 2 orders of magnitude.

Furthermore, such pumps cannot perform microinjector functions due to slow response times and inability to produce

Our solution

 

The disadvantages of stepper-based micropump systems have recently been solved by the development of a unique miniature Micro Dosing Pump based on a novel piezoelectric motor technology developed by Piezo Motion.

At the heart of the new Micro Dosing Pump is a precise rotary piezomotor that is directly coupled to a peristaltic pump head providing a superior direct-drive mechanism.

With a footprint of just 3.5" X 4.5" the MDP-444 also uses minimal bench space.

 

Principle of operation

Watch the principle of piezo motor operation in uni-directional and bidirectional modes

Piezo Motion’s rotary piezomotors work on a patented principle of excitation of ultrasonic standing waves within a piezoelectric resonator.

Watch the principle of piezo motor operation in uni-directional and bidirectional modes

The resulting superposition of two orthogonal ultrasonic waves causes elliptical movement of the resonator tip which drives the rotor. Piezo Motion’s electronic drivers have been designed to provide an economical user-control interface.

  • Manual mode

    Micro Dosing Pump is controlled manually (using the program buttons) to either Pump or Suck fluids.

  • Continuous mode

    Micro Dosing Pump functions in a similar manner to a precise peristaltic pump, enabling ultra smooth flow of fluids. The user can enter the desired parameters such as, flow rate, delivered volume/dose and flow duration.

  • Pulse mode

    Micro Dosing Pump functions as a rapid micro dosing pump. The user can enter the discrete dose volume (e.g. 2 μl), the number of doses and the dose frequency. The precise dose volume is then delivered within 5-7 ms.

     

  • Injection mode

    Micro Dosing Pump functions as a micro-injector. The user can enter the injection duration (e.g. 1 ms to 100 ms), number of injections and duration between injections. The maximum flow rate achieved within 1 ms is 500 ml/hr.

  • Scanning mode

    Micro Dosing pump functions as a rapid mixing pump automatically cycling between pump and suction enabling small volumes of fluids to be conveniently mixed. User can enter the volume and the number of mixing repetitions.

  • Custom mode

    Provides unlimited programmable control of all pump functions utilizing DTI’s freely available Python API*. This mode enables users to implement their own fluid delivery algorithms.

Your questions are important to us.

Have a question? Contact Piezo Motion by phone or email and a member of our team will reach back out to you.