Tachometers and Refractometers

The Krüss gemstone refractometers are offered either as a compact professional or standard version. They both provide a sharp image and good readab...

Innovative gemstone refractometer with built-in LEDs for mains and battery operation. Refractometer contact liquid ND 1.79 and polarization filte...

Gemstone refractometer with built-in filter (1.30 - 1.81 nD): Direct and easy to read scale from 1.30 - 1.81 nD with a division of 0.01. Reading 0...

GEMMODUL Module 3 LED Refractometer lighting base with monochromatic light for sharp, high-contrast images. LED refractometer lighting base Dim...

This Digital Tachometer is used to detect rotate speed, linear velocity or frequency of motor. It can be widely used in motor, fan, washing machine...