The Peristaltic Pump and the Salt Water Aquarium

peristaltic pumpThe peristaltic pump (peri pump for shortness) is a small very low flow pump originally designed for the medical profession. In that area it was used for the continuous careful and accurate administration of drugs etc.

The peri pump is usually square and quite small. There is a motor powered by normal mains voltage, which drives a central spindle. Attached to this spindle are three arms of equal length, and at the end of each arm is a roller. The three rollers obviously scribe a circle when rotating, and the rotation is very slow. The rollers roll over small flexible tubing, usually around ¼” (circa 5mm) in diameter, and this action causes any fluid within the tubing to be pushed in one direction. [Read more]