The AD-2 activity detector is a versatile optically based motion detector designed for small animals and small spaces. The AD-2 activity detector uses invisible infrared light (880 nm at very low power) that will not affect any organism's behavior.

Activity detectors are useful for separating episodes of activity and inactivity for behavioral assays and especially for respirometry. If you are trying to measure the inactive or "resting" metabolic rate of any animal, activity will corrupt your measurements. The AD-2 activity detector provides an objective determination of activity that can be recorded as a voltage signal. Thus, it is an essential component of a research-grade respirometry system for small animals such as insects.

The AD-2 activity detector has two optical probes (a transmitter and a receiver) that can be placed in any orientation, using either direct or reflected light. A holder for our RC-M miniature respirometry chambers is supplied standard.

The AD-2 activity detector uses uncritical 9 - 18VDC at very low power (< 30 mA). Multiple units can be daisy-chained for ease of connection. In the case of multiple-animal respirometry systems, the Sable Systems RM-8 respirometry chamber multiplexer can direct the electrical signal from the appropriate AD-2 to a data acquisition system.  

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