Digital Laboratory Refractometer

Abbe Refractometer Model RST 111


  • Model RST 111 is a standard abbe Refractometer which measures refractive indices of liquids & solidsquickly & accurately.
  • Widely use in sugar,pharmaceuticals ,beverage, food, chemical industries as well as research institutes.
Specification Model RST111
Measurement Range RI 1.3000-1.7000, Brix : 0-95%
Minimun Scale RI : 0.0005, Brix : 0.25
Measurement Accuracy RI : ±0.0002, Brix : ±0.2%
Measurement Temp. Range 10 to 50 C Minimum Indication : 0.1 C,
Dimensions & weight 270 X 180X 370 mm & 3.5 Kgs
Packing List/Accessories
  • 1 set special thermometer (with protective shield)
  • 1 standard sample (standard block)
  • 1 bottle of Naphtalene bromide
  • 1 screw driver
  • 1 operating instructions manual

Digital Abbe Refractometer Model RST 121


  • Digital Abbe Refractometer Model RST121 enable anybody carry out measurement easily without reading analog graduation with RS232 communication.
Specification Model RST121
Measurement Range RI 1.3000-1.7000, Brix : 0-95% (ATC 15 C-45 C)
Minimum Scale RI : 0.0001, Brix : 0.1%
Measurement Accuracy RI : ±0.0002, Brix : ±0.1%
Measurement Temp. Range 10 to 50 C Minimum Indication : 0.1 C,
Light Source LED
Digital Display LCD
Power Supply 220V-240V, 50Hz ± 1Hz
Dimensions & weight 330 X 180X 380 mm & 10 Kgs
Packing List/Accessories Standard Samples, Napthalene Bromide, Screw driver, RS-232 cable,
Dessicant, Fuse (1A), Power cable, disc, plastic cover, instruction manual

Automatic Refractometer Model AR-1700

auto_refractometer3The AR-1700 Automatic Refractometer from Holmarc is a compact instrument used for measuring the refractive index and brix at the digital, automatic level. The AR-1700 Automatic Refractometer features exceptional accuracy, automatic temperature compensation, a wide reading range, and simple and fast operation. It offers outstanding flexibility to provide accurate readings for a variety of applications.

The refractive index measurement is easy, fast and non-destructive and can be used to identify and characterize materials. The sample is placed on the measuring prism and is irradiated by a 589nm (Na D-line) LED.

The shadow line is detected with a high-resolution linear array CCD and hence the refractive index is obtained using internal software and is displayed. Degrees Brix (symbol °Bx) is the sugar content of an aqueous solution. It is the most commonly used refractometer scale for measuring solids dissolved in water; it corresponds directly to the refractive index scale. Temperature correction or control is necessary in refractometers because refractive index varies with temperature. In Holmarc’s refractometer automatic temperature compensation (ATC) corrects readings over a range of temperatures for sucrose solutions. A temperature sensor is also integrated for the precise measurement of sample temperature.
The AR-1700 refractometer features an expanded refractive index reading range of 1.3200 to 1.7000 which enables you to analyze a broad range of samples. The alphanumeric key pad and graphic display provide a means of entering and displaying prompts and data. Regardless of an instrument’s specified accuracy, a refractometer’s real world performance depends on how well the instrument is cleaned between samples. The AR-1700 addresses this issue by providing a very flat, easy to clean measurement surface with no corners or crevices that tend to trap samples causing contamination.

Specification Model AR-1700
Principle of operation Optical-Refraction Critical-Angle detection system
Refractive index 1.3200 – 1.7000
Resolution 0.0001
Accuracy +- 0.001
Brix 0 – 95%
Resolution 0.01%
Accuracy +- 0.5%
Optical Wavelength 589nm (Na D-line)
Light Source LED
Filter 589 nm Interference Filter
Detector Linear Array CCD
Display Graphic LCD
Temperature Sensor Pt 100
Power Supply AC 230V / 50Hz