Extech RF20 Salinity Refractometer with ATC, PPT and Specific Gravity
- Automotive Coolant & Fluid Tester - Quickly measure freeze point and fluid concentration of ethylene glycol, propylene glycol, battery acid, and windshield washer fluid.
- Wide Measurement Range - Ethylene/Propylene Glycol: -60 to 32°F (-50 to 0°C), Battery Acid: 1.15 to 1.30 specific gravity, Windshield Washer Fluid: -40 to 32°F (-40 to 0°C).
- Portable & Easy to Use - Compact handheld design with built-in prism and eyepiece; requires only a small fluid sample for fast, accurate testing.
- Rugged & Field Ready - Durable construction with ATC (Automatic Temperature Compensation) ensures reliable performance in workshop or outdoor conditions.
- Complete Kit Included - Comes with a protective case, eyedropper, calibration screwdriver, and cleaning cloth—ready to use right out of the box.
Estimated shipping
Select a product to estimate shipping.The Extech RF20 Handheld Refractometer is a precision tool designed for automotive technicians, mechanics, and maintenance professionals who need fast and accurate fluid analysis. This multi-purpose refractometer measures the freeze point of ethylene glycol and propylene glycol coolants, specific gravity of battery acid, and the concentration of windshield washer fluid. Featuring Automatic Temperature Compensation (ATC), the RF20 delivers reliable readings even under varying environmental conditions. Its compact and rugged handheld design makes it ideal for both shop and field use, requiring only a small sample size for immediate testing. Whether you’re performing cooling system diagnostics, preventive maintenance, or battery health checks, the Extech RF20 is a trusted, professional-grade tool that ensures vehicles remain safe, efficient, and road-ready.
Kit Includes:
Extech RF20 Portable Salinity Refractometer (0 to 100ppt) with ATC
Calibration Screwdriver
Calibration Solution
Plastic Pipette
Carrying Case
The Extech RF20 Salinity Refractometer measures the concentration of dissolved salt in fluids. Its compact size makes it easy to operate in small spaces and the prism and lens with its simple focus adjustment provides accurate and repeatable measurements on an easy to read scale. Accurate measurements can be taken using a mere two or three drops of solution. The Extech RF20 comes complete with a case, a calibration screwdriver, a plastic pipette and the calibration solution.
Salt: 0 to 100ppt
Resolution: 0.001
Accuracy: ±0.1%
Automatic Temperature Compensation: 10 to 30°C
Easy to Use Professional Refractometer
Easy to Read Display
Measuring the concentration of dissolved salt in fluids has never been easier thanks to the Extech RF20’s simple focus adjustment prism and lens.
Compact Design
At just 227 g (8 oz) and measuring a mere 7.6 x 1.5 x 1.5 inch (194 x 38 x 38mm), the RF20 is easy to carry and stows away nicely in a toolbox or within the included carrying case.
Automatic Temperature Compensation (ATC)
Temperature is one of the single most important factors influencing accurate refractometer readings and is one of the largest sources of error in measurement. With the RF20’s temperature compensation feature, a correction factor is automatically applied to ensure accurate readings.
Maintain Correct Salt Concentrations
Where tropical fish are concerned, a Salinity Refractometer, like Extech’s RF20, is key to ensuring the correct salt concentration within your aquarium.
For those with a saltwater pool, taking regular readings with a digital refractometer that measures the concentration of dissolved salt in water can help you keep the salt/water ratio in equilibrium.
Product details
Specifications
| Main Specification | |
|---|---|
| Included Components | Case, Guide, Calibration screwdriver, calibration solution |
| Manufacturer | Extech |
| Product Care Instructions | Wipe Clean |
| Specification Met | Iso 9001 |
| Item Length | 7.6 Inches |
| Outer Material | Plastic |
| Display Type | Digital |
| Brand | Extech |
| UPC | 793950222201 767654314678 |
| Resolution | 0.001 |
| Model Name | RF20 |
| Power Source | Battery Powered |
| Reusability | Reusable |
| Colour | Blue/Black |
| Global Trade Identification Number | 00793950222201 |
| Product information | |
|---|---|
| Response Time | 500 milliseconds |
| Technical Details | |
|---|---|
| Part Number | RF20 |
| Model | RF20 |
| Item details | |
|---|---|
| Indoor Outdoor Usage | Outdoor, Indoor |
| Age Range Description | Adult |
| Style | |
|---|---|
| Style Name | Salt (ATC) |
| Features & Specs | |
|---|---|
| Additional Features | High Accuracy |
| Others | |
|---|---|
| Product Type | Refractometers |
| Upper Temperature Range | 30 °C |
| Tags | |
|---|---|
| Tags | |