Refractometer Catagories

Temperature Compensation Makes The Difference!

[ 2015-3-1 ]

Temperature is one of the single most important factors influencing accurate refractometer readings and is one of the largest sources of error in measurement. Refractive index is very dependent on temperature. It is well known that substantially all materials expand when heated (become less dense) and contract when cooled (become more dense). The speed of light in a liquid increases with temperature, and the refractive index, therefore, decreases.

The amount of error per degree Celsius is different for every fluid and differs for different concentrations of the same fluid.

Temperature compensation relieves the user of the responsibility to measure temperature and apply a correction factor when taking readings. Temperature Compensation Makes The Difference!

The chart compares a temperature compensated  Refractometer (red) to a non-compensated competitor (blue). It is plain to see that at 20 'C (68 'F) they are both correct; however, as the temperature deviates from 20 'C, there is a marked error in the non-compensated instrument.

Refractometersales supply all kind of refractometer, such as brix refractometer and salinity refractometer.