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Sper Scientific
Sper Scientific 300034 Lab Digital Refractometer (Brix 0-88%)
$1197.15
Best Refractometers · head-to-head
Sper Scientific 300034 Lab Digital Refractometer (Brix 0-88%) vs Extech RF20 Salinity Refractometer
A sourced, side-by-side comparison. Sper Scientific 300034 Lab Digital Refractometer (Brix 0-88%) is cheaper at $1197.15. Every spec and price links to its source.
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Extech
Extech RF20 Salinity Refractometer
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Full spec sheet
✓ marks the stronger figure where "more" — or "less", for price and weight — is unambiguously better.
| Spec | Sper Scientific 300034 Lab Digital Refractometer (Brix 0-88%) | Extech RF20 Salinity Refractometer |
|---|---|---|
| US price | $1197.15 Current price on sperdirect.com | — |
| Brand | Sper Scientific | Extech |
| Released | — | — |
| Brix range pct | 0 to 88 | — |
| Resolution pct | — | 1 ppt |
| Accuracy pct | — | ±0.1% |
| Atc | — | Yes |
| Scale type | Brix | Salinity (0-100 ppt) |
| Digital or analog | Digital | Analog |
| Sample volume (ml) | — | — |
| Prism material | — | — |
Sources — Sper Scientific 300034 Lab Digital Refractometer (Brix 0-88%): sperdirect.com (verified 2026-08-12). Extech RF20 Salinity Refractometer: extech.com (verified 2026-08-12).
What's the difference between the Sper Scientific 300034 Lab Digital Refractometer (Brix 0-88%) and Extech RF20 Salinity Refractometer?
Where the two actually differ on the specs we track (2 of 8). Matching specs are omitted.
- Scale type: Sper Scientific 300034 Lab Digital Refractometer (Brix 0-88%) Brix vs Extech RF20 Salinity Refractometer Salinity (0-100 ppt)
- Digital or analog: Sper Scientific 300034 Lab Digital Refractometer (Brix 0-88%) Digital vs Extech RF20 Salinity Refractometer Analog