Extech Refractometers

Extech Refractometers

We supply the Extech brand optical and digital refractometers for a wide range of applications


The Extech digital refractometer allows quick and accurate % Brix or Refractive Index (RI) measurements of  dissolved sucrose level in liquids for beverage and food production,  determine maturity of fruits and plants, or control the concentration of industrial fluids (such as cutting coolants, hydraulic fluids, and  antifreeze) to extend equipment life and prevent corrosion. Fast three  second response time, the LCD displays %Brix or RI and Temperature. The  RF153 fits in the palm of your hand and it features built-in ATC, single Zero calibration, prism cover, and auto memory storing 10 readings.

The brix range measured is 0 to 53% Brix with a 0.1% Brix resolution.

Extech refractometers

These are handheld, non-digital, for sucrose, Brix, salinity, etc.

Extech has a unique, Triple Range Sucrose Brix Refractometer (0 – 41%, 42 – 71%, 72 – 90%) general service Brix refractometer with three measurement ranges.

email aqua@ecotao.co.za for prices


A refractometer is a laboratory or field device for the measurement of an index of refraction (refractometry).

A unique product, exclusive to Extech, it their triple range Brix refractometer with three measurement ranges,  0 – 41%, 42 – 71%, 72 – 90%.

Extech triple range brix refractometer
Extech triple range brix refractometer


XS Instruments refractometers

See the separate for the list of available models. Refractometers-new-XS-Instruments.

Other refractometers