Digital handheld refractometers

The mobile measurement with a digital handheld refractometer saves time as random checks or the regulation of mixing ratios can be carried out directly on the site.

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Digital handheld refractometers

Digital on-site measurements at the touch of a button

The measured results are determined at the touch of a button and shown on the display. Unlike in the case of the analogue handheld refractometers, the digital determination of reproducible measurement results does not depend on the user’s interpretation. The devices measure the refractive index and the sugar
content with automatic temperature compensation. The sample tray made of stainless steel and the measurement prism made of optical glass is formed in such a way for the devices that they can be easily and quickly filled and cleaned. For consistent measurement results we recommend a daily calibration with distilled water. For the adjustment we offer various certified and traceable calibration standards.

 

Typical applications

The digital hand-held refractometers DR101-60, DR201-95 and DR301-95 are the ideal solution for the chemical, petrochemical, automotive, aviation, metal processing and food industry as well as for hospitals and pharmacies.

  • Characterisation tests in research and development
  • Identity test, purity control and concentration determination of raw materials, semi-finished products and end products
  • Tracking of chemical processes during production
  • Outgoing goods inspection
  • Stability test
  • Determination of the sugar concentration
  • Incoming and outgoing goods inspection
  • Checking medicines for pharmacopeias
  • Analysis of body secretions

 

DR101-60

As an entry-level model for the digital refractometry, the
DR101-60 covers the measurement ranges between nD
1.3330–1.4419 and 0–60 % Brix. Thanks to the automatic
temperature compensation for the Brix scale, you can
achieve reproducible measurement results even under
changing environmental conditions. As a water-tight
device, the DR101-60 meets the IP65 standard and can be
cleaned under running water.

 

DR201-95

The compact handheld refractometer DR201-95 offers an
extended measurement range of the refractive index and
the sugar content of nD 1.3330–1.5318 and 0–95% Brix.
The automatic temperature compensation for the Brix scale
helps the user with the measurements of beverages and
sugary confectionary products. The device is splash-proof
and meets the IP64 standard.

 

DR301-95

As a mobile handheld device or digital tabletop unit, the
DR301-95 can measure the refractive index or the sugar
content within a measurement range of nD 1.3330–1.5318
or 0–95%Brix. In addition, the device measures the salinity
and allows for the use of two additional freely definable
scales. The automatic temperature compensation for the
Brix scale can be optionally connected.
A USB interface allows you to send measured data to a PC
or a printer at any time. An alarm option can be set up
for monitoring the limit values in production processes.
The provided mains adaptor turns the DR301-95 into a
small lab refractometer; for a mobile use it is operated
with a 9 V monobloc battery.

Model specifications

DR101-60 DR201-95 DR301-95
MEASUREMENT DATA
SCALES Refractive index (nD)
concentration of sucrose, glucose, fructose and invert sugar [%Brix]
Refractive index (nD)
Concentration of sucrose, glucose, fructose and invert sugar [%Brix],
salt content [‰], User-defined
MEASUREMENT RANGE nD 1.3330–1.4419
0–60 %Brix
nD 1.3330–1.5318
0–95 % Brix
MEASUREMENT ACCURACY nD ±0.0005
±0.35 %Brix
nD ±0.0003
±0.2 %Brix
nD ±0.00015
±0.1 %Brix
RESOLUTION nD 0.0001
0.1 %Brix
MEASUREMENT PERIOD approx. 1 s
MEASUREMENT PRISM Optical glass
LIGHT SOURCE LED
WAVELENGTH 589 nm
TEMPERATURE DATA
TEMPERATURE COMPENSATION 10–40 °C
TEMPERATURE MEASUREMENT With integrated temperature sensor Pt100
TEMPERATURE MEASUREMENT RANGE 10–40 °C
TEMP. MEASUREMENT ACCURACY ±0.5 °C
TEMP. MEASUREMENT RESOLUTION 0.1 °C
FURTHER SPECIFICATIONS
HOUSING Synthetic material, coated
INTERFACES . only USB
IP CODE IP65 IP64 IP50
OPERATING VOLTAGE 1.5 V battery 9 V battery (mains adaptor incl.)
DIMENSIONS (W X H X D) 110 mm x 62 mm x 32 mm 130 mm x 80 mm x 40 mm 180 mm x 100 mm x 60 mm
WEIGHT 160 g 200 g 500 g

 


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