eBay

Applications

Widely used in electronic cigarettes, medical devices, laboratory analyzers, sampling instruments, portable biochemical equipment, precision fluid control experiments and more.

This is a unused surplus ultra-mini peristaltic pump, squeeze pump and self-priming pump,
a precision fluid control component ideal for micro liquid dosing.

Working Principle & Features

The motor drives the internal rollers to rotate and compress the silicone tube. The squeezed section closes, pushing liquid forward. When the rollers release, the tube recoils elastically, creating negative pressure and automatically drawing in new liquid.

This design allows the pump to handle viscous liquids, with relatively high delivery pressure and low flow rate.
Fluid only contacts the silicone tube, not the pump body, ensuring zero leakage and no cross-contamination.
The silicone tube can be easily replaced when worn or aged.

Flow rate can be finely adjusted by changing the supply voltage.

Drive motor: M20 planetary gear motor, Motor outer diameter 10 mm
Rated voltage: DC 3V–3.7V
Operating voltage: DC 2.4V–4.2V
Pump housing: die-cast metal construction
Internal structure: precision metal triple rollers
Weight: approx. 11.2 g
Compatible silicone tube: outer diameter 2.5 mm, inner diameter approx. 1 mm

Flow & Electrical Specifications

DC 2.4V: approx. 1 drop per 2 seconds, current 30 mA
DC 3V: current 35 mA
DC 3.7V: current 38 mA
DC 4.2V: approx. 1 drop per second, current 38 mA
Maximum flow rate: below 2 mL/min

Notes:
This pump is designed specifically for ultra-low flow and high-precision liquid delivery.
Please do not purchase if high flow rate is required.

Condition Notes

Sold in bulk, unused condition, it may have little dusty on surface.
Most motor terminals are tinned-free
Some tubes are fixed with adhesive; some are not
Overall appearance is clean, but minor cosmetic imperfections may exist due to bulk packaging
Please refrain from purchasing if you demand perfect cosmetic condition.

Package List:

Mini Pump x 1