Columbus Instruments 8-Channel Mini-Counter

Columbus Instruments 4-Channel Mini-Counter

GRASS INSTRUMENTS VOLUMETRIC PRESSURE TRANSDUCER PT5-B w/ WOODEN CASE

Columbus Instruments Electromagnetic Animal Activity Monitor - Automex II-2SD

Columbus Instruments Automex Activity Monitor Silver - FOR PARTS

Grass Instruments PT5B Volumetric Pressure Transducer

Med Associates ENV-022MD Mouse Video Operant Conditioning Behavior SAC Chamber

Columbus Instruments 0154-5003 Emitter / Mouse, Small Animal Activity Monitoring