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Home  >>  Products  >>  Optical Instruments  >>  Abbe Refractometers Model DR-A1

Abbe Refractometers Model DR-A1-Plus

The Model DR-A1-Plus, with its digital display, provides the user with a precision instrument for the Brix and Refractive Index (nD) analysis of liquids, glass, plastic, & film.


This model features a brighter field of view than its predecessor the DR-A1, making it easier to measure inhomogeneous and/or dark samples. By very simple operation that needs only to set the boundary line of refraction at the cross hairs, this refractometer directly indicates a measured value in refractive index or Brix (%).

This model enables to carry out measurement easily without reading of analog graduation.It can be connected to a printer and computer.Please note that dispersive value cannot be measured by this refractometer.

Model DR-A1





Easy to Use - Operation consists of placing a sample on the prism. While looking through the eyepiece, the control knob is turned until the shadowline is centered in the crosshairs (see image below "Eyepiece View"). The reading is shown on the large LCD display. Calibrates with water or the included 1.5163 nD glass standard.

Digital Accuracy - High resolution and accuracy provides substantial precision for both liquid and solids testing. The digital display and simple operation both enhance overall precision - no analog scales to read.

Professional Features - Large, menu-driven LCD display; Refractive Index (nD) & Brix scales; primary & secondary prisms; color compensator dial; large measurement dial; focusable eyepiece; external power supply; desiccant case; drain nozzle.

LED Light Source - Long-life LED light source can be set for upper and lower settings enabling both transmission and< reflection measurement modes.

Prism Temperature Control - Featuring 2 circulator nozzles for the primary prism and 2 for the secondary prism. Model DR-A1-Plus can be connected to a circulating bath to accurately regulate prism temperature. The prism temperature is displayed on the LCD display. The effective temperature range is 5-50°C.

Automatic Temperature Compensation
- Features Automatic Temperature Compensation with 20°C as the reference point. Available for the Brix scale only. the effective compensation range is 5-50°C.

Glass, Plastic, & Film Testing
- Transparent or translucent film samples can be measured with the use of the included bromonaphthalene contact liquid and the optional film measurement test piece (Catalog No. RE-1146). Note:  The refractive index (nD) of the sample must be lower than that of the contact liquid. The included bromonapthalene contact liquid has a refractive index (nD) value of 1.6300.

Double Refraction (Birefringence) Testing - With the optional polarizing eyepiece (cat. no. RE-1145). Model DR-A1-Plus can test samples exhibiting double refraction. For example, a piece of film with this characteristic would have a machining direction (V axis), a right-angle to machining direction (X axis), and a thickness direction (Z axis) - the refractive index must be measured for each axis.

Display Model DR-A1Eyepiece View


Technical Data

Technical Data
Measuring Range: Refractive Index (nD) 1.3000 to 1.7100, Brix 0.0 to 95.0% (ATC is executed at 5 within 50°C)
Minimum Indication: Refractive Index (nD) 0.0001, Brix 0.1%
Measurement Accuracy: Refractive Index (nD) ±0.0002, Brix ±0.1%
Measurement Temperature: 5 to 50°C
Thermometer Accuracy: ±0.2°C
Ambient Temperature: 5 to 40°C
Indications: Refractive Index (nD), Brix (%), Temp (°C)
Display: LCD
Power Supply: AC adapter (100 to 240V (50/60Hz) AC input)
Power Consumption: 16VA
Output: Printer DP-63(C) (Optional), PC (via RS-232C)
Dimensions and Weight: 13x29x31cm, 6.0kg (Main unit)



Prices subject to change    Prices listed in US dollars for domestic shipments within US, Canada, & Mexico only    Export orders require quotations - click here for a quote     For more info call us 1-800-762-2478 or 954-946-9454.
Item Number Item Prices
RE-1311 Model DR-A1-Plus Refractometer $8,999.00
Optional Items
RE-3136 DP-63(C) Digital Printer 1,566.00
RE-1581 Film Measurement Test Piece Adapter P.O.R.
RE-1146 Polarizing Eyepeice P.O.R.


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