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Coffee Roast Color Analyzer Roasting Degree Measurement with USB 50mm Large Aperture 400-700nm Wavelength for Ground Coffee Powder SCAA Indexes 0.01% Reflectance Resolution D65 10° Observer

Digital Spring Pressure Tester Spring Tension Testing Machine with Maximum Test Machine Load 30N Minimum Resolution 0.001N Store 99 Sets of Test Data Three Measurement Units(N/KG/Lb) Measurable Maximum Free Length of Spring 80mm

Portable Water pH Analyzer Portable pH Gauge Tester with Calibration Liquids Range -2.00 to 20.00 pH Range -1999 to 1999 mV Calibration 1 to 3 points USB Communication Interface for Measure the pH Value of Sample Solution

VTSIQI Spring Tester Machine Spring Compression Testing Machine with Maximum Test Machine Load 20N/2KG/4.5Lb Minimum Resolution 0.001N/0.0001KG/0.0001Lb Maximum Free Length of Spring 80mm Indication error +/-1% for Test Extension and Compression Force

VTSQIYI Digital Voice Concrete Test Hammer Rebound Hammer with Ranges 10 to 60MPa Rebound Hammer Impact energy 2.207J NDT Testing Machine Non-contact Metal Reflection Grating Sensor

VTSQIYI Integrated Voice Digital Test Hammer with USB Communication Measuring Ranges 10 to 60MPa Rebound Hammer Impact Energy 2.207J High-Resolution LCD Screen

VTSYIIQI Portable Textile Hardness Meter Yarn Package Durometers with Indenter Ball 10mmΦ Display Range 0-100H Accuracy≤±1H Depth Of Indentation 0-2.5mm Test Pressure Approx. 12.5N for very Loosely Wound Bobbins of Thick Yarns

VTSYIQ 2 in 1 Coating Thickness Gauge Tester with Built-in F and NF Type Sensor Measuring Range 0 to 1250µm