yieryi online manufacture

3 In 1 Grape & Alcohol Wine Hand Held Refractometer Brix Baume And W25v / V Scales Heavy duty (Durable Aluminum) Approved by strict quality and safety standards Durable and built to last long Heavy-duty with ... Read More

ATC Portable Antifreeze Refractometer Ethylene Glycol Tool Ice Point Concentration Detector Application: 1. The refractometer are designed for measuring the concentration of the battery fluids. 2. the freezing ... Read More

Aquarium Water Quality Salt Pool Water Salinity Meter Pen Type Range 0.0% To 10.0% Features: * 0.0 to 10.0% * LCD with indicates both % & temp. * Pen type digital tds meter, all in one, salt electrode included, ... Read More

Emulsion Concentration Tester Hand Held Refractometers / Specific Gravity Refractometer Decription of Emulsion Concentration Tester 1) appearance characteristics Principal part,Prism, cover plate, rubber, ... Read More

Waterproof Digital Handheld Ph Meter Automatic Water Analyzer Control Range 0.0~14.0ph +/-500mv Professional Water Analyzer Control Range 0.0~14.0pH +/-500mV Pen Type Waterproof Digital pH & ORP Meter Automatic ... Read More

Black Color High Precision Water TDS Meter Pen Eur / Usa Plug English Version 2017 new brand English version black color EUR/USA plug High precision TDS Quality water electrolyzer electrolysis pen Description: ... Read More

EC -963 Digital EC Meter Tester Conductivity Water Quality Measurement Tool Features Compact and pocket-sized design Easy to use and provides a quick measurement High accuracy with 2% full scale accuracy Data ... Read More

Mine Oil Atc Portable Refractometer 0-15% Anti Rust Cutting Emulsion Concentration Tester 1) appearance characteristics Principal part,Prism, cover plate, rubber, glassAre made of high quality materials, mainly ... Read More

Water Quality Analysis Digital Ph Meter Device / Hydroponic Ph Tester For Aquarium Pool Water Portable Pen-Type digital pH Meter pH-006 Water Quality Analysis Device Hydroponics Aquarium Pool Water ph Tester ... Read More

High Precision pH-007 Pen-Type pH Meter pH / TEMP tester Water Quality Analysis Acidity meter Features: Great to measure the pH level & temperature of solution/water. Imported control chip & full waterproof ... Read More