SP Bel-Art Specific Gravity Hydrometer 0.790/0.900

What matters most

Its 0.790/0.900 range is designed for measuring the specific gravity, or relative density, of liquids lighter than water. That makes this SP Bel-Art H-B DURAC hydrometer a focused tool for checking samples in settings such as food and beverage, chemical, pharmaceutical, transportation, and refrigeration work. The scale has 0.002 divisions and stated accuracy of ±0.002, so its intended use is more specific than a general-purpose instrument with a broader range. It is 165 mm (6.5 inches) long, made of glass, and uses lead-free ballast, each unit is individually serialized.

From the way it is set up, this is for readings within a defined range, not for covering liquids with any density. Keep in mind that the listed accuracy is ±0.002, so the graduations should not be mistaken for a promise of finer measurement precision. It suits you if your work calls for checking liquids lighter than water within this instrument’s range. It might not be a great match if you need measurements outside that range or information about conditions such as temperature correction, which the product details do not specify.

How to use it

Use the hydrometer when the question is the relative density of a liquid sample, rather than its volume or weight. For example, it could help you check a lighter-than-water liquid during a quality-control workflow, then record the reading alongside the sample details. The product information does not provide a step-by-step procedure, so follow the handling and reading method required by your process rather than assuming that a particular protocol is included.

The package includes a multilingual Statement of Accuracy in English, French, German, Italian, Portuguese, and Spanish. It states that accuracy is traceable to NIST. That documentation may be useful when a measurement needs to be accompanied by an accuracy statement, but it does not add a wider measuring range or change the stated ±0.002 accuracy.

Practical tips

Before choosing it, compare the range with the values your work actually needs to measure. A narrow-range hydrometer can be a better fit than a broader-range alternative when the target liquids are known to be lighter than water and fall within 0.790/0.900. If your samples can fall outside those limits, a different range is the more practical direction. The 0.002 scale divisions also make it worth matching the instrument to the resolution your workflow requires.

Its glass construction and 165 mm length are useful details for planning storage and handling, but the listing does not state a storage case or special care instructions. Avoid treating those as included features. The former HB number is 50500, which can help distinguish this model when comparing product records.

Questions before you buy

What kinds of liquids is it intended for? Liquids lighter than water, including samples in food and beverage, chemical, pharmacology, transportation, and refrigeration applications.

What range and accuracy does it have? The range is 0.790/0.900, with 0.002 divisions and stated accuracy of ±0.002.

Does it come with accuracy documentation? Yes. The package includes a multilingual Statement of Accuracy indicating accuracy traceable to NIST.

Buying verdict

This hydrometer makes sense when you need a glass, individually serialized instrument for specific-gravity readings in its stated range, and the included accuracy statement is useful to your documentation process. Choose a different approach if you need broader coverage, finer stated accuracy, or product details about temperature correction and care that are not provided here. Its value is in matching a defined measurement task, not in serving as an all-purpose liquid-testing tool.