Consistent, accurate tension readings every time! Now you can get consistent, accurate tension readings without the stress, thanks to the Sonic Tension Meter. It measures belt tension by analyzing the harmonic characteristics of a vibrating belt. Simply strum the belt like a guitar string and the meter takes care of the rest. The force and deflection method used to be the only reliable way to test belt tension. Of course, it required a spring tester, plenty of muscle, a piece of string and unfortunately, at least three hands. Belts, like strings, vibrate at a particular natural frequency based on mass and span length. Gates unique Sonic Tension Meter simply converts this frequency into a measurement of tension.  Here’s how it works: First, enter belt mass constant, belt width and span length into meter using built-in keypad. Next, hold meter sensor to belt span, then lightly strum belt to make it vibrate. Press “measure” button to obtain reading and the meter quickly converts vibrations into belt tension. Readings are displayed on a liquid-crystal screen. * Belt mass constants are listed on a data card that comes with the Sonic Tension Meter.

New Cooler and Insulin Packs is highly portable and delicate pocket size, light weight, smooth edges and corner, delicate shape, making you carry it conveniently and enjoy its fashion design. Multiple power supply,DC12-24V(Vehicle power),AC100-240v,7.4V battery(batteries working time is around 12 hours),three power supplies make you carry medicine anywhere and anytime. Environment friendly Adopt thermoelectirc refrigeration technology, Feron-free. Simple operation?Equip with large LCD temperature display screen,lightly touch switch,designed for simple easy operation.5.2-8 degree Celsius Keep 2-8 degree Celsius ambient 25 degree Celsius,keep insulin safe 30 days under ambient 40 degree Celsius.