Choosing the Correct Pump

WPI carries a wide variety of fluid handling tools utilizing different technologies:

• Microinjectors
• Peristaltic pumps
• Syringe pumps
• Pneumatic injectors

The range of applications and the criteria used to select a particular pump or injector is broad and complex, and we encourage you to contact us and speak with an application specialist. In the meantime, here is a listing of our popular pumps and injectors sorted by technology, flow range and special features.

Special features tell you about applications or functionsof the pump. Many of the syringe pumps can be had with an alarm option that alerts you to the end of travel or blocked flow. The onew with the “P” option allow for programmable flow and volume profiles without using the RS232 computer interface.

Frequently used terms:

• Infuse/Withdraw (I/W): Describes a feature of a syringe pump whereby the syringe plunger is held by the pusher so the motor can pull the plunger back, withdrawing fluid, as well as pushing the plunger to infuse it. 
• Push/Pull: A feature of syringe pumps which use two syringes mounted back to back so movement of the pusher block will simultaneously withdraw fluid into one syringe and infuse an equal amount from the other.
• RS232: This is a serial interface. Some pumps in the WPI line can be controlled by computer. Simple programs can be created to control the pump rate, the overall volume. Flow ramps or other profiles and temporal sequences can be written. In addition, pumps can be daisy-chained together to create a pump network. In such a network, each pump has its own address and can be controlled separately by the program.