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.

Specifications:

Working Temperature: 0℃ - 40℃
Motor voltage: 5 to 6 VDC / 12V DC
Motor current: 500mA / 200-300mA for 12V DC
Flow rate: up to 100 mL/min
Tube length: approx 530mm / 20.8"
Tube diameters: inner diameter 3.5mm, outer diameter 5mm

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.

Warranty: 30days

Warranty will not apply if Product fails or is damaged after delivery to you due to accident, abuse or misuse.

Package Includes:

1 x Adafruit 3910 / 1150 Peristaltic Liquid Pump with Silicone Tubing

Motor Specifications
Type	DC Motor
Electrical Specifications
Maximum Operating Voltage	5 to 6 VDC / 12V DC
Minimum Operating Current	500mA for 6V DC / 200-300mA for 12V DC
Maximum Operating Temperature	0℃ - 40℃
Physical Attributes
Weight	104g for 5 to 6V DC, 200g for 12V DC
Dimensions	27.8mm diameter motor, 66.8mm total length for 5 to 6V DC / 27mm diameter motor, 72mm total length for 12V DC