Shipping Policy : Battery Not Included During the Shipping Feature Main used in belt tension measurement, can also be applied to measure the tension of objects such as tapes, wires. Widely applied in industries of automobile, textile, cables, wires, plastic films, paper, printing. Specification Display: LCD Tension Indicator: Colored LED Indication of High,Low and OK Measuring range:0~750N(Newtons); 0~120lb(Pounds); 0~77kg(Kilograms), 0~114 Seems Accuracy: ±5% of full-scale Belt Width: Up to 36 mm Resolution: ±1N (or1 least significant digit of other units) Overload alarm: 750N Max. load: 850N Audible Warning: Piezoelectric Sounder Power Supply: 4x1.5V AAA(UM-4)Battery(Battery not included in package) Dimensions: 135x62x33 mm Weight: 335g(Not Including Batteries) Standard Accessories: Main Unit, Measuring Head, Carrying Case(B04), Operation Manual Features This Belt Tension Tester used the exclusive Micro-computer LSI circuit and crystal time base to offer high accuracy measurement. It can be used to measure and adjust the tension of timing and auxiliary belts fitted to motor vehicles and other machines. Tension can be displayed in a variety of standard and manufacturers' units. Tension limits can be set into the instrument, either manually or automatically. During belt tension measurement and adjustment, the belt tension is displayed. A visual and audible indication of whether the tension is within or outside the set limits is also given. This avoids the user having to read the display whilst adjusting the belt. The selected tension limits, measurement units and calibration parameters are stored in The memory of the tester, and will be remembered even when the instrument is switched off and the batteries removed. Belt Tension Meter Sonic Belt Tension Meter Infrared Belt Tension Meter Infrared Belt Tension Meter Add to Cart Add to Cart Buying Options Add to Cart Customer Reviews — 4.0 out of 5 stars 1 5.0 out of 5 stars 1 — Price $279.00$279.00 $380.00$380.00 — no data $640.00$640.00 Working principle: none transverse vibration of the string Laser emission and reception Laser emission and reception Measuring range 0~750N(Newtons); 0~120lb(Pounds); 0~77kg(Kilograms), 0~114 Seems 10Hz-680Hz 10Hz~500Hz 10Hz~800Hz