JN-B precision torsion balance is a sensitive precision measuring instrument that can measure very light weight. It is easy to operate, and can read the measurement value directly, quickly and correctly without using weights. This balance is suitable for weighing and precise analysis of trace substances in electronics, textiles, metallurgy, chemical industry, agriculture, health departments, research institutes and colleges and universities.
The main structure of this type of balance is composed of two elastic elements, flat coil spring and leaf spring. When using it, no weight is needed, just turn the reading knob, and rely on the balance torque generated by the elastic element torsion angle to measure the weight of the substance. So there is no fulcrum mechanical wear. Since the balance adopts a single-arm lever structure, there is no unequal arm error. At one end of the beam, a quick-stop damper is installed so that the swing of the beam can stop within a few seconds, so that it is convenient to quickly read the measured value. The main structure of the balance is sealed in the shell, and the weighing pan and the material to be weighed are isolated from the outside world by the metering box.
● Mainly suitable for high-precision measurement of trace substances.
● It adopts the principle of combination of elastic elements, no fulcrum mechanical wear and high sensitivity.
● It can directly read the measured data without using weights during work.
● Easy to operate and read quickly.

| model | Weighing range | Readable precision | net weight | Dimensions | Package size |
| JN-B-5 | 5mg | 0.01mg | 5kg | 250×210×360mm | 380×325×525mm |
| JN-B-10 | 10mg | 0.02mg | 5kg | 250×210×360mm | 250×210×360mm |
| JN-B-25 | 25mg | 0.05mg | 5kg | 250×210×360mm | 250×210×360mm |
| JN-B-50 | 50mg | 0.1mg | 5kg | 250×210×360mm | 250×210×360mm |
| JN-B-100 | 100mg | 0.2mg | 5kg | 250×210×360mm | 250×210×360mm |
| JN-B-250 | 250mg | 0.5mg | 5kg | 250×210×360mm | 250×210×360mm |
| JN-B-500 | 500mg | 1mg | 5kg | 250×210×360mm | 250×210×360mm |
| JN-B-1000 | 1000mg | 2mg | 5kg | 250×210×360mm | 250×210×360mm |
| JN-B-2500 | 2500mg | 5mg | 5kg | 250×210×360mm | 250×210×360mm |