Urine Hydrometer
Jolles-type urinometer, calibrated at 20 °C with a range of 1,000–1,060 kg/m³ with 1-unit divisions
Compact and reliable instrument for clinical analysis, designed to measure the specific gravity of urine accurately.
Made of glass, with a total length of 145 mm.
Urine Hydrometer for Clinical Analysis
The urine hydrometer, also known as a urinometer, is an instrument used to measure the relative density or specific gravity of urine. This measurement is essential in clinical laboratories to assess the kidney’s ability to concentrate and dilute urine, and to detect potential imbalances in the body’s hydration status.
The standard model features a scale from 1,000 to 1,060 kg/m³ with 1-unit divisions, calibrated at 20 °C. It is made of glass and has a total length of 145 mm. Its simple, reagent-free use makes it a practical choice for routine analysis.
The hydrometer operates on the principle of flotation: the instrument is placed vertically into a cylinder containing a sufficient volume of liquid sample. The depth of immersion varies depending on the density of the liquid, and the reading is taken at the point where the liquid surface intersects the scale on the stem. For reliable results, the sample must be bubble-free and at a stable temperature. If the temperature differs from 20 °C, the appropriate correction must be applied using standard compensation tables. Our catalogue includes ungraduated glass cylinders specifically designed for use with hydrometers, alcoholmeters, and aerometers.
In addition to traditional hydrometers, alternative methods exist for measuring urine density. Among them, refractometers allow readings using just a single drop of sample, based on the liquid’s refractive index. Our catalogue includes a handheld clinical refractometer with automatic temperature compensation (ATC), reference 720.3120, specifically designed for medical applications. This model features three integrated scales: serum proteins, urine specific gravity, and refractive index. A versatile and precise tool for healthcare professionals and diagnostic laboratories.
| Model | Range | Graduation | Length | Reference |
|---|---|---|---|---|
| Jolles urinometer | 1.000–1.060 kg/m³ | 1 kg/m³ | 145 mm | 407.001 |
Data sheet
- Product Type
- Specific Use Hydrometer
- Application
- Orina
- Scala Density SG
- 1,000-1,060 kg/m³
- Accuracy Min. Div. SG
- 1 kg/m³
- Calibration
- Calibrated at 20 °C with distilled water (without certificate)
- Category
- Hydrometers / Aerometers
- Prepare the materials:
• Clean the glass cylinder and rinse it with a small amount of the liquid to be measured to avoid contamination.
• Select a hydrometer suitable for the expected density; if it sinks too much, it is not the correct range. - Fill the cylinder:
• Pour the liquid into the cylinder without overfilling it, avoiding overflow when inserting the hydrometer.
• Ensure the product temperature is correct; otherwise, use equivalence tables. - Insert the hydrometer:
• Hold it from the top and gently introduce it into the liquid.
• Spin it slightly with your fingers so it does not stick to the cylinder walls and can float freely. - Allow stabilisation:
• Let the hydrometer float freely and vertically without touching the bottom or the sides of the cylinder. - Take the reading:
• Position your eyes at the liquid level and observe the graduated scale.
• Read at the bottom of the meniscus (the curve formed by the liquid surface). This point on the scale corresponds to the relative density of the liquid. - Handheld refractometer with 3 scales – Ref. 720.5150
View product
Measures °Brix, Baumé and probable alcohol. Requires only 2–3 drops. - Mustimeter (glass hydrometer) with 2 scales – Ref. 414.
View product
Used with a 250 ml glass cylinder.
Recommended cylinder
Good morning:
In response to your enquiry, we need to know the Baumé scale of this chemical product. Once confirmed, we will be able to indicate the correct reference you should purchase together with the glass measuring cylinder, which is 524.017.
To use a hydrometer (aerometer for liquids) in a cylinder:
Which instrument is used to measure grape must?
Grapes do not have "degrees" per se; what is measured is the sugar content in the must, which helps estimate probable alcohol content. We recommend two instruments:
Both options are reliable, but the refractometer is more practical and faster.