Sensing Switches - Siemens Hematek Operating Manual

Sensing Switches

The sensing switches are three finger-like devices located just above the back edge of the
platen. When contacted, the respective sensing switch is activated, which tells the
instrument that a slide is in position for the pump to run. After a specific time delay, the
pumping motor for the specific reagent is activated. The solution pumps are set so that
precise volumes of stain, buffer, and rinse are delivered to their respective areas on the
platen. Each reagent is delivered through its respective cannula and tubing network to the
platen orifice. The capillary space between the slide and the platen is then filled with the
measured volume of reagent.
Figure 1-6. Sensing Switches
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Sensing Switches

Page 1—10, Section 1: Introduction