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Product Code: H24-05
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The Contact Sensor is an electronic switch that senses the passage of a very low current through the subject.  The current level is less than 5 microamps and is well below sensation threshold.  The standard response connector on the unit connects to any switch input on the ECB just as do levers, photo cell sensors, pecking keys, etc.

The sensing leads may be connected to any two conducting parts of the environment.  When the subject touches both, completing the circuit, the switch reports the response.  This device may used to sense animal contact with novel stimulus devices mounted on a module panel.

Note: The contact sensor is not the optimal method for sensing contact with a drink tube.  A photocell sensor with the Optical Lickometer (H24-01M or H24-01R) is recommended.  When the subject makes contact with the lick tube, a meniscus bridge is formed between the tube and the subject.  The contact sensor will detect a single "lick".  The Optical Lickometer will detect the movement of the subject's tongue providing a record of the number of licks.  The Optical Lickometer also eliminates the problem of disengaging the Contact Sensor in a Vogel Procedure.  Since there is no electrical contact between the photo cells and the lick tube, shock can be delivered directly through the lick tube.

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