Description
Brix Illuminated Refractometers Brix Automatic Temperature Compensation Refractometers / LED Light in the Prism Cover Refractometers are optical instruments used to investigate the behavior of light when it is transferred from one medium to another. It is therefore very important that both the prism and the prism cover are kept clean, dry and scratch-free. This Brix refractometer with illumination works like almost all analogueue handheld refractometers according to the transmitted light principle and is suitable for the examination of transparent liquids. Analogue Brix refractometers usually work with ambient light that penetrates through prism cover, sample and measuring prism. In this Brix refractometer with illumination, there is an LED lighting in the prism cover. This makes it independant of the ambient light and can also be measured in the case of weak lighting in the outdoor area. The scaling is adjusted to the LED lighting. Measurements in cellars, laboratories, production halls or workshops can therefore be carried out with this Brix refractometer with lighting, without which the scale for the respective artificial light must be checked and, if necessary, adjusted again. At the transition point, the LED light is bent from the sample liquid to the measuring prism and directed via a lens to a disc with a measuring scale. The refractive index of the fluid examined determines the angle at which the light from the measuring prism hits the lens. The angle of refraction determines which areas of the measuring scale are illuminated. The value for the tested liquid can be read on the scale at the limit line between light and dark. Depending on the components used, Brix refractometers can be designed for different measuring ranges. This Brix Refractometer with illumination has a scale of 0 to 32% Brix and a division of 0.2% Brix. It can therefore be used in many areas and is also suitable for quality control of technical auxiliary materials such as coolants and lubricants. The contrast of the scale display can be adjusted by turning the eyepiece to the visual acuity of the user. The Brix Illuminated Refractometer can be tested for accuracy with distiled water and special calibration fluids. If the limit line on the scale does not show 0% Brix for distiled water and the calibration liquid does not show the corresponding value, the display can be corrected using an adjusting screw. The adjusting screw is located on the top of the device near the support for the prism cover. A suitable screwdriver is already included in the supplied equipment case. Also a pipette and a cleaning cloth have space in the handy device case, which protects the Brix refractometer above all from contamination and accidental damage. The scales of the Brix refractometers with illumination are designed for a temperature of 20 ° C, because the refractive index of a material depends on the temperature. For this reason, make sure that the measuring device and the sample have the same temperature during the measurement. Since the ambient temperature, to which the device adapts, is not constant at many measuring points at 20 °C, a built-in temperature compensation simplifies the work. For example, bimetal strips are used for analogue Brix refractometers, as in thermometers. Due to their temperature-dependant deformation, these shift the position of the dial so that the same Brix value is always displayed for a sample, regardless of the temperature. Without this automatic temperature compensation, which is often abbreviated to ATC in the device specifications, either constantly recalibrated to the respective temperature or additionally the temperature should be measured and the measured Brix value corrected to the value valid at 20 °C.
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