Cheminert Models M6 and M50 liquid handling pumps (photo) are a new option for precision handling of liquids and gases, producing a bidirectional, pulseless flow with a range of over six orders of magnitude (10 nL/min to 10 mL/min for the M6 Pump; 50 µL/min to 50 mL/min for the M50 Pump). Said to be an excellent replacement for syringe pumps, the Cheminert pumps offer better performance and eliminate the need for refill cycles and syringe changes. The M6 and M50 are positive displacement pumps, which means they are self-priming and tolerant of any gas that may find its way into the fluid lines. There is no separate fill cycle, and the capacity is said to be unlimited. RS-232 and RS-485 communication protocols are incorporated into the microprocessor-driven controller. — Valco Instruments Co., Inc., Houston, Tex.
A positive displacement alternative for syringe pumps
| By Chemical Engineering