The WZS series handheld sugar meter (refractometer) is a precision optical instrument used to measure the concentration of liquids. It has the characteristics of simple operation, easy to carry, easy to use, less measuring liquid, accurate and rapid. It is a commonly used instrument in sugar testing, fruit inspection, food and beverage, marine aquaculture, scientific research and mechanical processing.
| Uses | Instrument model | Measuring range | Minimum reading |
| Brix | WZS 5 | 0~5% | 0.001 |
| WZS 10 | 0~10% | 0.001 | |
| WZS 18 | 0~18% | 0.001 | |
| WZS 20 | 0~20% | 0.001 | |
| WZS 32 | 0~32% | 0.002 | |
| WZS 50 | 0~50% | 0.005 | |
| WZS 60 | 0~60% | 0.005 | |
| WZS 62 | 28~62% | 0.002 | |
| WZS 82 | 45~82% | 0.005 | |
| WZS 92 | 58~92% | 0.002 | |
| WZS 80 | 0~80%(1 ranges) | 0.005 | |
| WZS 90A | 0~90%(1 ranges) | 0.005 | |
| honey | WZS N3 | 58~92%Brix | 0.5% Brix |
| 38~43oBe' | 0.5oBe' | ||
| 12~27%Water | 1%Water | ||
| salinity | WZS A1 | 0~100‰ | 1‰ |
| 1.000~1.070 | 0.005 | ||
| WZS A2 | 0~28% | 0.002 | |
| WZS A3 | 0~35% | 0.005 | |
| WZS A4 | 0~40PPT | 1‰ | |
| WZS S1 | 0~100‰Salinity | 1‰ | |
| 1.000~1.070 | 0.005 | ||
| 0~10%Brix | 0.001 | ||
| WZS S2 | 0~28%Salinity | 0.002 | |
| 0~32%Brix | 0.002 | ||
| Readings | scale | ||
| Instrument size | 155mm×25mm×40mm | ||
| Net weight of the instrument | 160g | ||