Handheld Brix Refractometer
A handheld refractometer for fast, single-drop gravity readings from pre-boil through fermentation. Auto-temperature-compensated.
| SKU | HW-E-RFM |
|---|---|
| Price | £38.00 / each |
| In stock | Yes |
| Origin | China (rebranded) |
| range brix | 0–32 |
| divisions brix | 0.2 |
| atc | yes (10–30 °C) |
| calibration | zero with distilled water |
The refractometer is the most-used instrument on our brew days. It reads gravity from a single drop of wort or fermented beer, and unlike a hydrometer you don’t have to dump 100 mL into a tube each time.
What it reads
The scale is Brix (% sugar by weight). To convert to specific gravity, use the formula:
SG ≈ 1 + (Brix × 0.004)So 12 Brix ≈ 1.048 SG. This is a useful approximation — for serious accuracy our ABV calculator and the wort-correction adjustments matter.
After fermentation
Alcohol throws off the refractive index. Reading a refractometer on fermented beer needs a correction to estimate true FG. Most brewing software does this automatically; you can also just take a final-gravity hydrometer reading to settle it.
Calibration
Zero with a drop of distilled water at room temperature. Re-check before every brew day — bumps and temperature swings drift the zero.