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Salinity Refractometers
The ECO7211 Economy Refractometer offers a low-cost alternative to a the more expensive digital
refractometers. These refractometers are ideal when cost is more important than durability, accuracy and precision.
If all you need is a quick ballpark reading, then our new economy refractometer is right for you.
For those applications requiring the most precise and accurate readings, or for applications
involving quality control or safety, we recommend that you select from one of our durable premium refractometers.
| Unit of Measure |
Range |
Resolution |
| Parts per Thousand (ppt) |
0 to 100 ppt |
1 ppt |
| Specific Gravity (d 20/20) |
1.000 to 1.070 |
0.001 |

Digital Fiberoptic Refractometer (DFR)
Measure Salinity percent concentration, ppt, specific gravity
and freeze point.
The Digital Fiberoptic Refractometer is fast, easy to
use, and incorporates the latest cutting-edge fiberoptic sensor technology. Simply dip the end of the refractometer into a
liquid solution, press a button, and the powerful Motorola microprocessor quickly displays a digital readout with computer
precision. Automatic temperature compensation insures that fluids read at temperatures between 0°C and 50°C (32°F and 122°F)
are measured accurately.
The large LCD display is easy-to-read and removes the guessing
associated with reading conventional refractometers. Gone are the days of trying to adjust your eyeglasses, while squinting
into a small eyepiece, to determine where a fuzzy little boundary line crosses tiny scale divisions.
Non-Linear Temperature Compensation
Automatic-temperature-compensation eliminates the need for
measuring temperatures and applying a correction factor when taking readings. Unlike traditional handheld refractometers that
compensate in a straight line for only one fluid, the MISCO DFR can have multiple non-linear temperature compensation channels
for different scales. Both the range and accuracy of the temperature compensation exceed any other refractometer available.
What does this mean to you? More accuracy. A refractometer without temperature compensation simply can't measure up.
Weight: 150 g (5.3 oz.) with battery Dimensions:216
mm x 38.1 mm x 25.4 mm (8.5" x 1.5" x 1") ATC Range: 0°C (32°F) and 50°C (122°F) POWER: 9-Volt Battery - Good For About
60 Hours of Use
9 Main Street, Suite 2E P.O. Box 423 Manchaug, MA 01526 508-476-1935
Phone 508-476-1927 Fax www.rlinstruments.com
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