39811 Photo Tachometer
Machine speed: It is critical for proper machining operations. Speeds too fast or too slow can shorten tool life and cause expensive, unnecessary machine downtime. This digital photo tach can take readings from revolving shafts on drill presses, grinders, lathes and other machines. It can also be used to check engine operation on in-plant vehicles like forklifts. The 3344 is accurate to within ± 1 rpm. The 13/32" high liquid crystal display is easily visible even in high ambient light areas.
No. 39811 – Replacement magnetic base assembly. Wt. 0.3 lb.
Readout: Liquid crystal display: 4 (13/32" high) digits, low battery indicator, memory mode indicator, high and low RPM memory mode indicator.
Range: 200 to 9999 rpm. Accuracy: ± .25%, ± 1 rpm. Update time: 3/4 second.
Power switch: Membrane switch (automatic shut-off after one minute of no signal input). Power source: 9 volt alkaline battery.
Light source: Infrared with 15-foot plug-in cable. Light holder assembly: 30 lb. rated magnet; 2" dia. x 1/4" high (4" high overall with post).
Size: 33/8" w, 6" h x 11/2" d.
C case: 131/2" w, 10" h x 4" d.