# VEE GEE MDX-101 Digital Brix/Refractive Index Refractometer vs Extech RF20 Salinity Refractometer: specs and price compared

A sourced, side-by-side comparison of the VEE GEE MDX-101 Digital Brix/Refractive Index Refractometer (VEE GEE Scientific) and Extech RF20 Salinity Refractometer (Extech) among refractometers.

## Side by side

| Spec | VEE GEE MDX-101 Digital Brix/Refractive Index Refractometer | Extech RF20 Salinity Refractometer |
| --- | --- | --- |
| US price | $367.06 | not published |
| Brand | VEE GEE Scientific | Extech |
| Brix range pct | 0.0 to 50.0 | — |
| Resolution pct | 0.1 | 1 ppt |
| Accuracy pct | ±0.2 | ±0.1% |
| Atc | Yes | Yes |
| Scale type | Brix / Refractive Index | Salinity (0-100 ppt) |
| Digital or analog | Digital | Analog |
| Sample volume (ml) | — | — |
| Prism material | Stainless steel sample well | — |

## Key differences

- Resolution pct: VEE GEE MDX-101 Digital Brix/Refractive Index Refractometer 0.1 vs Extech RF20 Salinity Refractometer 1 ppt
- Accuracy pct: VEE GEE MDX-101 Digital Brix/Refractive Index Refractometer ±0.2 vs Extech RF20 Salinity Refractometer ±0.1%
- Scale type: VEE GEE MDX-101 Digital Brix/Refractive Index Refractometer Brix / Refractive Index vs Extech RF20 Salinity Refractometer Salinity (0-100 ppt)
- Digital or analog: VEE GEE MDX-101 Digital Brix/Refractive Index Refractometer Digital vs Extech RF20 Salinity Refractometer Analog

## Sources

- VEE GEE MDX-101 Digital Brix/Refractive Index Refractometer: https://www.veegee.com/collections/digital-refractometers/products/refractometers-digital-brix-refractive-index-refractometers (veegee.com, verified 2026-08-12)
- Extech RF20 Salinity Refractometer: https://www.extech.com/products/RF20 (extech.com, verified 2026-08-12)

Canonical: https://frontdeskreview.com/gear/refractometers/veegee-mdx-101-vs-extech-rf20/
Cite: Per The Front Desk Review, VEE GEE MDX-101 Digital Brix/Refractive Index Refractometer ($367.06) vs Extech RF20 Salinity Refractometer (not published) — sourced spec-by-spec comparison at https://frontdeskreview.com/gear/refractometers/veegee-mdx-101-vs-extech-rf20/
License: CC BY 4.0.