PCE Deutschland Brix refractometer with LED illumination PCE-032-LED

Refractometers are optical instruments used to study the behavior of light as it passes 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 works with illumination like almost all analog handheld refractometers according to the transmitted light principle and is suitable for examining transparent liquids.Analog Brix refractometers usually work with ambient light that penetrates through the prism cover, sample and measuring prism.This Brix refractometer with lighting has LED lighting in the prism cover This means that you are independent of the ambient light and can also measure outdoors in poor lighting.The scaling is matched to the LED lighting.

Measurements in basements, in laboratories, in production halls or workshops can be carried out with this Brix refractometer with lighting without the scale for the respective artificial light having to be checked and readjusted if necessary. The LED light is diffracted at the point of transition from the sample liquid to the measuring prism and directed via a lens onto a disc with a measuring scale. The refractive index of the liquid being 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 boundary 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 from 0 to 32% Brix and a graduation of 0.2% Brix.

It can therefore be used in many areas and is also suitable for the quality control of technical auxiliary materials such as coolants and lubricants. The contrast of the scale display can be adjusted to the user’s visual acuity by turning the eyepiece. The Brix refractometer with illumination can be checked for accuracy with distilled water and special calibration liquids. If the limit line on the scale does not show 0% Brix for distilled water and does not show the specified value for the calibration liquid, the display can be corrected using an adjusting screw. The set screw is located on the top of the unit near the prism cover bracket. A suitable screwdriver is already included in the device case. There is also space for a pipette and a cleaning cloth in the handy case, which primarily protects the Brix refractometer from dirt and accidental damage. The scales of Brix refractometers with illumination are designed for a temperature of 20 ° C, since the refractive index of a material depends on the temperature. Therefore, when measuring, it is important to ensure that the measuring device and the sample have the same temperature.

Since the ambient temperature to which the device adapts is not a constant 20 °C at many measurement locations, built-in temperature compensation makes work easier. For analog Brix refractometers, bimetallic strips are used, for example - as in thermometers. Due to their temperature-dependent 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, it would either have to be constantly recalibrated to the respective temperature or the temperature would also have to be measured and the measured Brix value corrected to the value applicable at 20 °C.