FastRack Triple-Scale Brewing Hydrometer, Model 5451
Compare manual density measurement with a floating hydrometer and an appropriate jar.
Read the differences ↗aichose · Gravity & sampling
Handheld Brix and Wort-SG Refractometer with ATC and Case
An optical sample tester with Brix and wort-SG scales, a focusable eyepiece and a storage case.
Price & purchase ↓
The equipment in use
How this item fits your brewing setup
This instrument reads a small sample on a prism rather than floating in a test jar. The daylight plate covers the sample, and you view the scale through the focusable eyepiece. Choose this format for optical checks when you do not want to draw a full hydrometer-jar sample for every reading.
The declared Brix range is 0–32%, and the view has a second scale labeled SG wort. That SG scale is a wort reference, not a direct alcohol-strength reading. The listed upper SG limit and the photographed scale differ, so confirm the actual display if your decision depends on that endpoint.
ATC means automatic temperature compensation. It does not remove the need to check zero according to the instrument’s instructions, and it does not correct for alcohol after fermentation. Alcohol changes refractometer interpretation; do not treat an uncorrected fermented-sample reading as direct remaining sugar or final gravity.
The selected offer includes the handheld tester and a case. The gallery shows a dropper, calibration screw and focus adjustment, but no certified accuracy tolerance or separate calibration standard is established. Compare a floating hydrometer for a different measurement method, or the Tilt for readings transmitted from inside the fermenter.
The selected reference
Specifications & supplied details
- Manufacturer field
- Xindacheng
- Listing model
- COMINHKPR124469
- Measurement principle
- Optical refractometer
- Declared Brix range
- 0–32%
- Second display scale
- SG wort
- Temperature compensation
- ATC, selected offer
- Adjustments shown
- Focus and calibration screw
- Supply
- Handheld tester with case
- Listed dimensions
- 7×1.5×1.5 in
- Listed item weight
- 3.7 oz
Before and during use
Advice for this reference
Before you choose
Choose the optical small-sample workflow for the type of liquid you will actually test.
Also check
Confirm the scale endpoint and appropriate post-fermentation correction method before relying on the wort-SG display.
Connections & scope
Fit and useful limits
- No selected ATC operating range, temperature accuracy, SG upper limit or certified measurement tolerance is established.
- Alcohol compensation is not a feature proved by the ATC label.
- No direct final ABV, constant dropcount/samplevolume, Hanna specifications or pure chromium construction claimed.
Questions about this product
What else should you know?
Does ATC make a fermenting-beer reading directly comparable with a hydrometer?
No. Temperature compensation does not correct alcohol’s effect on refractometry. Fermented samples require an appropriate interpretation or correction method.
Can I skip the zero check because it has ATC?
No. Compensation and calibration are different tasks. Follow the supplied instructions for checking and setting zero.
What changes if I choose a floating hydrometer?
A hydrometer reads density while floating in a larger sample. This optical tool reads through a prism, with different sample preparation and post-fermentation interpretation.
A different choice for a different need
Compare the relevant alternatives
Tilt Black Wireless Fermentation Hydrometer and Thermometer
Compare in-fermenter wireless density/temperature monitoring instead of an optical spot sample.
Read the differences ↗Continue choosing