Laboratory pump PT-SP

dosing

The PT-SP multi-syringe pump is designed specifically for parallel sample withdrawal and dosage of media from a dissolution bath into open vials inside a fraction collector. It is equipped with 6 or 8 replaceable 10ml high precision glass syringes. Each syringe is connected to a 3-way pinch valve for media flow control. The drive of the syringes is carried out simultaneously by a stepper motor. All syringes are rigidly connected to the common sturdy drive bar. The high resolution of the steps for a full stroke ensures a high accuracy of dosing and sampling. Depending on the tube dimensions and the volume to be dosed, the sampling and dosing rate can be adjusted. The complete cycle for a withdrawal of the sample medium and emptying of all tubes and syringes is fixed. First, the hose lines are filled, drained back into the reservoir and then refilled. This ensures an equal concentration of media inside the tubes, syringes and vessels. The withdrawal cycle that takes place depends on the volume to be sampled and will be done in either one or two steps. This is determined automatically by the programming of the PT-SP according to the volume of the syringes.