The pump is basically a geared down DC motor, so it has a lot of torque. Inside

the pump is a 'clover' pattern of rollers. As the motor turns, the clover presses

on the tube to press the fluid though. The pump does not need to be primed

and in fact can self-prime itself with water a half meter with ease. You can PWM

the motor to speed up or slow down the flow rate and if you connect the motor

the other way it will move fluid the other direction. Works great with either a

power transistor (basic on/off) or a motor driver chip such as the L293D.

Also works with our Crickit for Circuit Playground Express! Use the crickit run

motor blocks on Microsoft MakeCode, and you're off to a great start!

We've also got a version that works well with 12V DC power.

Please note: The pump comes with a bit of silicone tubing already installed with

two half-meter tubes attached on with barbed connectors. However, the silicone

tubing is not sterile and might be dirty on its way to you. Before using, the

tubing must be sterilized! The included tubing is also not rated FDA or USDA

compliant and is only meant for basic testing of the pump. If you need to

purchase FDA/USDA compliant tubing for use with your food-hacking project,

check out McMaster-Carr. They have many types of silicone tubing available by

the foot! We also have a meter of silicone tubing you can pick up right now!

Wikipedia has a great article on peristaltic pumps. Please check it out for more

details on how these devices work!

TECHNICAL DETAILS



Working Temperature: 0℃ - 40℃



Motor voltage: 5 to 6 VDC



Motor current: 500mA



Flow rate: up to 100 mL/min



Weight: 104 grams



Dimensions: 27.8mm diameter motor, 66.8mm total length



Mounting holes: 3.7mm diameter, 50mm center-to-center distance



Tube length: approx 530mm / 20.8"



Tube diameters: inner diameter 3.5mm, outer diameter 5mm