Description:10N Spring Dynamometer Used for Measuring Force and Weighing Objects in Physical Mechanics Teaching Experiment   Specification:Material: Plastic + MetalSize: 330×60×55mmMeasurement Range: 10NComponent: Fatigue Resistant Spring, Pointer, Regulator, Hook, Pressure Table and Scale Plate Features:1. The scale plate is in high resolution, which makes it easy to recognize the reading. 2. Suitable for physical mechanics teaching and experiment.3. Easy to operate and enough light to carry.  Instructions:1. Check whether the pointer is aligned to zero before using it. If not, turn the top adjusting nub.2. When measuring force, you are supposed to reverse the small hook and the hook ring to the side, and then you can recognize the reading when the bearing platform can be stressed. Notice:1. The force measured should be within 10N. Not to exceed the calibration limit.2. Keep it under dry condition, not contacting with acid and alkali so as not to corrode the instrument. Package Included:1 x Dynamometer