Aparticularly convenient means for controlled liquid injection is the optional MSC202 dosing syringe. Each device is designed to inject up to 50 ml against up to 100 bar (1450 psi) and gives low controlled flow rates (from 0.001 to 10 ml/min) that are pulse free, accurate, and stable. The syringe has a fixed seal through which the piston is driven (so there is an annular gap between the piston and cylinder). This intelligent design simplifies cleaning and maintenance, since the syringe can be easily flushed using valves on either end of the cylinder body. The motor drive is protected by front and back limit switches, and the control system is tied into the automatic safety shutdown system.

Dosing from multiple syringes can be prescribed ahead of time, or controlled as the output from a user-specified control loop, say to maintain a process variable such as True Power at a specified value. This option is particularly intriguing for those interested in on-line process optimization.