Accurate and reliable timing for shaking and other laboratory use. Minimum setting 1 second, maximum 60 minutes, by minutes and seconds, with built in buzzer. Accuracy +/- .015%. A strong, textured, plastic case measures 7-1/2" x 7-1/2" x 2-1/4", resists chemicals and is electrically nonconductive. Two separate receptacles are provided for automatic switching of external instruments.
 
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Large 60 Minute Timer 110V, 60hz, T-02-708
Large 60 Minute Timer 240V/50 HZ , 7" Face (ONLY A FEW LEFT), T-03-335