Key facts
- Brand
- EXTECH
- Model
- RF20
- Industry
- Industrial
- Documents
- 2
- Languages
- EN
- Last added
- 2012-08-01
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Extech RF20 Handheld Salinity Refractometer User's Guide
The Extech RF20 is a precision optical instrument designed to measure the refractive index of samples. It displays results in parts per thousand (0/00) and specific gravity (d 20/20) and features automatic temperature compensation for ambient temperatures between 50°F and 86°F (10°C to 30°C). The device includes a prism, cover plate, adjustment screw, mirror tube, and eyepiece for viewing the shadow-line.
Read onlineEXTECH RF20 specifications
| Scale Range | 0 to 100 0/00 |
|---|---|
| Resolution | 1 0/00 |
| Specific Gravity Range | 1.000 to 1.070 d 20/20 |
| Resolution | 0.001 d 20/20 |
| Dimensions | 7.6 x 1.5 x 1.5" (194 x 38 x 38mm) |
| Weight | Approx. 8.0 oz. (227g) |
Source: Extech RF20 Handheld Salinity Refractometer User's Guide
All EXTECH RF20 documents by type
Day-to-day operation, settings and troubleshooting. Start here if the product is already set up.
Questions answered in these manuals
What is the temperature compensation range?
The instrument automatically adjusts readings for ambient temperature variations between 50°F to 86°F (10°C to 30°C).
From: Extech RF20 Handheld Salinity Refractometer User's Guide
How do I perform a zero adjustment?
Place distilled water on the prism, close the cover plate, and rotate the adjusting screw until the shadow-line evens up with the zero line.
From: Extech RF20 Handheld Salinity Refractometer User's Guide
Does the RF series include Automatic Temperature Compensation?
Yes, some models are available with or without Automatic Temperature Compensation.
What is included in the standard package?
The unit comes complete with a case, calibration screwdriver, and calibration solution.