This unique test chamber has been designed with three distinct compartments that can be separated by optional manual or automatic guillotine doors. Automated data collection is accomplished by adding fifteen infrared photobeam detectors. The overall inside dimensions are 8.25" W x 8.24" H x 26.75" L (21 x 21 x 68 cm). The base for this unit measures 34" long x 10" deep (86.4 x 25.4 cm). Mounting holes for the ENV-013IR Infrared Sensor Package are provided. This package places six photobeams across the white and black zones 0.5" (1.25 cm) from the end wall and 2" (5 cm) between beams. Three photobeams are placed across the gray zone spaced 1.875" (4.75 cm) apart. The ENV-013IR package and associated ENV-256C control must be ordered separately.

The center compartment is 4.75" (12 cm) long, finished neutral gray with a smooth PVC floor that can be removed for easy cleaning, and a hinged clear polycarbonate lid for loading a test animal.

The choice compartments are 11" (28 cm) long.  One compartment is all black with a stainless steel grid rod floor consisting of 3/16" (4.8 mm) rods, placed on 5/8" (16 mm) centers.  The other is all white with a 1/2" x 1/2" (1.25 x 1.25 cm) stainless steel mesh floor. Stainless steel waste pans are provided beneath both choice floors.  Additional floors may be added with rods on white frames and mesh on black frames. Optional ceiling light packages with manual dimmers are available to help balance the natural preference of the animal.