Mini Hydrometer Triple Scale

This mini hydrometer is a compact triple-scale specific gravity instrument designed for a 50 ml glass cylinder — giving homebrewers, winemakers and cider makers an accurate gravity reading from a fraction of the sample a full-size hydrometer demands. Where a standard hydrometer needs a tall trial jar and 200 ml or more drawn from the batch for every reading, this one measures from just 50 ml: less beer sacrificed per reading, faster sampling, and a setup that actually fits on a crowded brew day.

Despite the size it is a properly made instrument: specific gravity scale from 0.980 to 1.100, calibrated at 20 °C / 68 °F for an upper-meniscus reading, with a shot-weighted ballast bulb for a stable float. The scale carries colour-coded brewing zones — a green start beer band around typical original gravities, a red finish beer band at terminal gravity, and an add sugar mark for priming — so you can read fermentation status at a glance without converting numbers first.

Every reading with a full-size hydrometer costs a meaningful pour that can't safely go back in the fermenter; tracked from pitch to terminal gravity, those samples add up. The mini hydrometer slashes that loss: draw 50 ml, spin, read, done. It is also quicker to sanitise, easier to store, and far less fragile in handling than a long standard hydrometer.

Key features

• Triple scale: specific gravity 0.980–1.100 with colour-coded beer start/finish zones and add-sugar mark
• Reads from just 50 ml of sample — vs 200 ml+ for a full-size hydrometer
• Calibrated at 20 °C / 68 °F, read at the upper meniscus
• Shot-weighted ballast for a stable, accurate float
• Covers original gravity, fermentation tracking and final gravity for beer, wine, cider and mead
• Compact, quick to sanitise, easy to store

Usage

• Draw a 50 ml sample into the glass cylinder, lower the hydrometer and give it a light spin to shed bubbles
• Read the specific gravity at the upper meniscus, where the liquid surface crosses the scale
• Measuring away from 20 °C? Take the sample temperature and apply the standard correction
• Green zone = typical starting gravity; red zone = fermentation finished; add-sugar mark = priming range

Quick facts

• Brand: CraftBrew
• Type: mini triple-scale hydrometer
• Scale: SG 0.980–1.100, plus colour-coded beer start/finish zones
• Calibration: 20 °C / 68 °F, upper meniscus, 45 mN/m
• Sample vessel: 50 ml glass measuring cylinder
• Sample volume: 50 ml (vs 200 ml+ for standard hydrometers)
• Use: original gravity, fermentation tracking, final gravity, ABV calculation

Related products

• ENDO Measuring Cylinder 50ml Class A — the certified sample cylinder this hydrometer is made for
• Hydrometer Specific Gravity Meter — the full-size version for bigger trial jars
• Waterproof Digital Thermometer — for the temperature correction on every reading
• RAPT Pill Hydrometer & Thermometer — the digital route: gravity logged from inside the fermenter

INTERNAL - cut this whole block after copying the values into the admin fields:
Price 6.90 (was lower; repriced 20 Oct 2026)
Anchors fetched 20 Oct 2026: Brouwland Brewferm beer hydrometer 2-scale EUR 9.99 (275mm full-size), Vinoferm 3-scale EUR 7.99 - we sit 1.09 under the Vinoferm as the compact no-brand option
Cost: auction stock, no reliable replacement cost fetched - cost field NOT touched by this CSV
21% BTW - no CH override needed (automatic /1.21 +5%)
Weight check: if this listing sits at 0 g, set ~80 g (boxed) in admin
Search boosts (10 separate terms):
mini hydrometer
hydrometer 50ml
kleine hydrometer
densimeter
sg meter
soortelijk gewicht meter
hydrometer bier
wijn hydrometer
startgravity meten
eindgravity meten