Professional Microscopes for laboratory, industry and food
Refractometers measure the refractive index of liquids, pastes and solids with high precision. In close cooperation with well-known partners from industry and research, we have developed refractometers that can be easily integrated into existing processes in the laboratory.
A.KRÜSS offers two thermoelectric circulation thermostats with integrated Peltier technology for external temperature control. The temperature is generated by means of a current flow through semiconductors. So can be done by simply reversing the direction of flow in a small space both heating and cooling. The A.KRÜSS circulating thermostats fulfill all standard tasks and routine work in laboratories and industry. They are specially designed for sample temperature control, analysis tasks and for the temperature control of our high-quality laboratory equipment such as polarimeters and refractometers.
Discover our high-quality centrifuges for laboratories and medical practices, ensuring reliable results in sample preparation. Whether for blood collection, urine analysis, or specialised laboratory examinations – we offer a wide range of benchtop centrifuges, microhematocrit centrifuges, and universal centrifuges from leading brands. Our models are characterised by easy operation, low noise levels, and precise separation results. With various rotors and adapters, they are highly versatile and perfectly suited to the needs of medical practices, laboratories, and research facilities. Find the right centrifuge for your daily routine work now and benefit from quality, safety, and excellent value for money.
Precision balances
Analytical balances are high-precision laboratory balances and are used in scientific and industrial laboratories of various industries to determine the mass of solid, bulk and liquid substances with an accuracy of 0.1 mg. Semi-microbalances are even more accurate - their readout resolution is 0.01 mg. Laboratory analytical balances according to OIML have a special accuracy class I. An important characteristic of any balance is the weighing range, the weighing range value for analytical balances from 50 g to 500 g.
The operation of modern electronic analytical balances is based on the principle of electromagnetic compensation. According to this principle, the weight of the load is compensated by an electromagnetic force directed opposite to the weight. The compensating force is determined by the strength of the current flowing in the magnetic coil. The electrical signal from the sensor is converted into digital, corresponding to the measured mass, and displayed on the display.
The analytical balance platform is located inside a transparent display case, which serves to eliminate the accumulation of dust and the influence of air currents on the measurement accuracy. The calibration of this precision instrument can be external, internal or automatic. Electronic analytical balances are equipped with a large number of additional functions:
Moisture analysers
Extension box KERN KUP-13 to connect to multiple devices
| Product family | KUP |
| Dimension (W×D×H) | 10×10×10 mm |
| Interfaces | KUP |
| Cable length | 0,15 m |
| Net weight approx. | 0,30 kg |
High-quality precision balance with automatic internal adjustment
| Weighing capacity [Max] | 3000 g |
| Readability [d] | 0,01 g |
| Linearity | ± 0,05 g |
| Reproducibility | 0,02 g |
| Stabilization time | 3 s |
| Interfaces | RS-232 standard, USB-Device |
| Adjustment options | Internal calibration (automatic) |
| Ambient temperature | 15 °C – 35 °C |
| Dimensions weighing surface (Ø) | 135 mm |
| Material housing | plastic |
| Dimension housing (W×D×H) | 220×340×105 mm |
| Material weighing plate | stainless steel |
| Net weight approx. | 3,0 kg |
| Construction type of the scale | Single-range balance |
Interface adapter with cable. Interface with Bluetooth BLE (v4.0) KUP, cable length 0,15 m
| Product family | KUP |
| Dimension (W×D×H) | 10×10×10 mm |
| Interfaces | Bluetooth BLE (v4.0), KUP |
| Cable length | 0,15 m |
| Net weight approx. | 0,30 kg |
WiFi data interface to transfer data from balances to PC or tablet
| Product family | KUP |
| Dimension (W×D×H) | 10×10×10 mm |
| Interfaces | WiFi standard, KUP |
| Cable length | 0,15 m |
| Net weight approx. | 0,10 kg |
The inverted biological laboratory microscope - with fluorescence
Interface adapter with cable. Interface with analogue (4 - 20 mA) KUP, cable length 0,15 m
| Product family | KUP |
| Dimension (W×D×H) | 10×10×10 mm |
| Interfaces | analogue (4 - 20 mA), KUP |
| Cable length | 0,15 m |
| Net weight approx. | 0,30 kg |
The flexible laboratory assistant with infinity optical system and fixed, pre-centred Koehler illumination
The flexible laboratory assistant with infinity optical system and fixed, pre-centred Koehler illumination
The inverted metallurgical microscope for professional applications
The flexible and powerful polarising microscope for all professional applications with reflected and transmitted light
Optimised price performance ratio, ideal for laboratories, universities, schools
| Weighing capacity [Max] | 120 g |
| Readability [d] | 0,1 mg |
| Linearity | ± 0,4 mg |
| Reproducibility | 0,2 mg |
| Stabilization time | 3 s |
| USP Minimum weight of sample (k = 2, U = 0.1%) | 400 mg |
| Interfaces | RS-232 standard |
| Adjustment options | Adjusting with external weight |
| Recommended adjusting weight | 220 g (E2) |
| Ambient temperature | 10 °C – 30 °C |
| Dimensions weighing surface (Ø) | 90 mm |
| Material draught shield | glass |
| Material housing | plastic |
| Dimension housing (W×D×H) | 230×310×330 mm |
| Material weighing plate | stainless steel |
| Net weight approx. | 4,4 kg |
| Construction type of the scale | Single-range balance |
Optimised price performance ratio, ideal for laboratories, universities, schools
| Weighing capacity [Max] | 220 g |
| Readability [d] | 0,1 mg |
| Linearity | ± 0,4 mg |
| Reproducibility | 0,2 mg |
| Stabilization time | 3 s |
| USP Minimum weight of sample (k = 2, U = 0.1%) | 400 mg |
| Interfaces | RS-232 standard |
| Adjustment options | Internal calibration (automatic) |
| Recommended adjusting weight | 200 g (E2) |
| Ambient temperature | 10 °C – 30 °C |
| Dimensions weighing surface (Ø) | 90 mm |
| Material draught shield | glass |
| Material housing | plastic |
| Dimension housing (W×D×H) | 230×310×330 mm |
| Material weighing plate | stainless steel |
| Net weight approx. | 5 kg |
| Construction type of the scale | Single-range balance |
Optimised price performance ratio, ideal for laboratories, universities, schools
| Weighing capacity [Max] | 120 g |
| Readability [d] | 0,1 mg |
| Linearity | ± 0,4 mg |
| Reproducibility | 0,2 mg |
| Stabilization time | 4 s |
| USP Minimum weight of sample (k = 2, U = 0.1%) | 400 mg |
| Interfaces | RS-232 standard |
| Adjustment options | Internal calibration (automatic) |
| Recommended adjusting weight | 120 g (E2) |
| Ambient temperature | 10 °C – 30 °C |
| Dimensions weighing surface (Ø) | 90 mm |
| Material draught shield | glass |
| Material housing | plastic |
| Dimension housing (W×D×H) | 230×310×330 mm |
| Material weighing plate | stainless steel |
| Net weight approx. | 5 kg |
| Construction type of the scale | Single-range balance |
Moisture analyser with user-friendly graphics display and 15 memories for drying programs
| Weighing capacity [Max] | 200 g |
| Readability [d] | 0,01 g |
| Weighing system | Strain gauge |
| Temperature [Min] (°C) | 40 °C |
| Temperature [Max] (°C) | 199 °C |
| Stabilization time | 3 s |
| Units | g, % Humidity, % Dry mass |
| Reproducibility | 0,01 g |
| Linearity | ± 0,03 g |
| Readability moisture [d] (%) | 0,05% |
| Drying modes | Standard drying, Rapid drying, Gentle drying |
| Switch-off criteria | time controlled, automatic, manual |
| Input voltage device / power [Max] | 230 V AC, 50 Hz |
| Product group | Moisture analyser |
| Weighing capacity [Max] | 60 g |
| Readability [d] | 0,001 g |
| Weighing system | Single-Cell |
| Temperature [Min] (°C) | 50 °C |
| Temperature [Max] (°C) | 200 °C |
| Stabilization time | 3 s |
| Units | g, % Humidity, % Dry mass, % ATRO |
| Reproducibility | 0,001 g |
| Linearity | ± 0,003 g |
| Readability moisture [d] (%) | 0,01% |
| Drying modes | Standard drying, Rapid drying, Gentle drying, Drying in levels |
| Switch-off criteria | time controlled, automatic, manual |
| Product group | Moisture analyser |
| Weighing capacity [Max] | 160 g |
| Readability [d] | 0,001 g |
| Weighing system | Strain gauge |
| Temperature [Min] (°C) | 35 °C |
| Temperature [Max] (°C) | 160 °C |
| Stabilization time | 4 s |
| Units | g, mg, % rH, % Dry mass |
| Reproducibility | 0,001 g |
| Linearity | ± 0,003 g |
| Readability moisture [d] (%) | 0,01% |
| Drying modes | Standard drying, Rapid drying |
| Switch-off criteria | time controlled, automatic, manual |
| Input Voltage | 110V or 240V, 50-60 Hz |
| Product group | Moisture analyser |
The KRÜSS DR301-95 is both a high-quality mobile handheld device and a simple digital desktop device. In addition to the refractive index and sugar content, it can also measure the salt content (%) (NaCl). On request, the DR301-95 can be manufactured with any two other scales. Via the menu control it is possible to switch on the automatic temperature compensation for each scale – with measurement reference to sucrose. An alarm option can be set up for monitoring limit values in production processes. The supplied Mains adaptor turns the DR301-95 into a small laboratory refractometer. In mobile use, it is operated with a 9 V block battery. The DR301-95 is used in the food and beverage industry, in pharmacies, laboratories
The DR201-95 is a compact, mobile and splash-proof digital handheld refractometer. It is used to measure the refractive index (nD) and the sugar content in % (%Brix) of liquid and viscous samples. Thanks to the automatic temperature compensation for the BRIX scale, a reproducible measurement can be achieved even under changing ambient conditions. The automatic temperature compensation for the BRIX scale supports the user when measuring sugary drinks and confectionery. The device is splash-proof and meets the IP64 standard. The DR201-95 is used in the food and beverage industry, in pharmacies, laboratories and testing laboratories as well as in research and teaching.
KRÜSS DR101-60 is a compact, mobile and splash-proof digital handheld refractometer. Thanks to the automatic temperature compensation for the BRIX scale, a reproducible measurement can be achieved even under changing ambient conditions. As a waterproof device, the DR101-60 meets the IP65 standard and can be cleaned under running water. The DR101-60 is used in the food and beverage industry, in pharmacies, laboratories and testing laboratories as well as in research and teaching.
The KRÜSS AR4 is a classic Abbe refractometer. The scales can be set manually using the drive knob and the refractive index and Brix values are read off using an eyepiece. The temperature is measured with the integrated digital thermometer and displayed on the LCD. The AR4 refractometer can be connected to a circulation thermostat for temperature control. This device can be used in a wide range of applications: for identity checking, purity control and concentration determination of raw materials, semi-finished products and end products or for determining the sugar concentration as well as for incoming and outgoing goods inspection.
The following models have a particularly large measuring range for the refraction index and large divided scales for measuring Brix values.
Main areas of application:
Universal field of application, primarily for applications which require an extra large measuring range
Scales | Measuring range | Division |
|---|---|---|
Refractive index | 1,333 nD - 1,405 nD 1,405 nD - 1,468 nD 1,468 nD - 1,517 nD | 0,005 nD 0,005 nD 0,005 nD |
Scales | Measuring range | Division |
|---|---|---|
Brix | 0% - 42 % 42 % - 71 % 71 % - 90 % | 0,2 % 0,2 % 0,2 % |
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