Join Date: Dec 2009
Location: Philadelpha, Pa
I use the SP100 OEM Fixed Flow Peristaltic Pumps from APT Instruments. I got them outlet plug installed and norpene tubing for durability. I went without the casing an was able to easily mount them to the inside of my stand with wood screws. You can select the RPMs and tubing diameter based on the number of ml/min you're looking for.
They'll come in closer to the $80 range than $20, but they've been rock solid reliable for 3+ years now. As I remember, they were on the less expensive end of the ones I researched and thought would be reliable and practical - that was over 3 years ago though.