# Atago Master-20T Analog Brix Refractometer (0-20%) vs Extech RF20 Salinity Refractometer: specs and price compared

A sourced, side-by-side comparison of the Atago Master-20T Analog Brix Refractometer (0-20%) (Atago) and Extech RF20 Salinity Refractometer (Extech) among refractometers.

## Side by side

| Spec | Atago Master-20T Analog Brix Refractometer (0-20%) | Extech RF20 Salinity Refractometer |
| --- | --- | --- |
| US price | $235 | not published |
| Brand | Atago | Extech |
| Brix range pct | 0.0 to 20.0 | — |
| Resolution pct | 0.1 | 1 ppt |
| Accuracy pct | ±0.2 | ±0.1% |
| Atc | Yes | Yes |
| Scale type | Brix | Salinity (0-100 ppt) |
| Digital or analog | Analog | Analog |
| Sample volume (ml) | — | — |
| Prism material | — | — |

## Key differences

- Resolution pct: Atago Master-20T Analog Brix Refractometer (0-20%) 0.1 vs Extech RF20 Salinity Refractometer 1 ppt
- Accuracy pct: Atago Master-20T Analog Brix Refractometer (0-20%) ±0.2 vs Extech RF20 Salinity Refractometer ±0.1%
- Scale type: Atago Master-20T Analog Brix Refractometer (0-20%) Brix vs Extech RF20 Salinity Refractometer Salinity (0-100 ppt)

## Sources

- Atago Master-20T Analog Brix Refractometer (0-20%): https://atago-usa.com/master-20t-p314.html (atago-usa.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/atago-master-20t-vs-extech-rf20/
Cite: Per The Front Desk Review, Atago Master-20T Analog Brix Refractometer (0-20%) ($235) vs Extech RF20 Salinity Refractometer (not published) — sourced spec-by-spec comparison at https://frontdeskreview.com/gear/refractometers/atago-master-20t-vs-extech-rf20/
License: CC BY 4.0.