Description
The portable seawater digital refractometer HI96822 determines the salinity of natural and artificial seawater by refractive-index measurement. It reports results in practical salinity units, parts per thousand and specific gravity: 0 to 50 PSU, 0 to 150 g/L (ppt) and specific gravity 1,000 to 1,114, with resolutions of 1 PSU, 1 g/L (ppt) and 0,001 specific gravity, and accuracies of ±2 PSU, ±2 g/L (ppt) and ±0,002 specific gravity. Temperature measurement spans 0 to 80 °C at 0,1 °C resolution with ±0,3 °C accuracy; automatic temperature compensation works from 10 to 40 °C and a reading is obtained in about 1,5 seconds. Only two drops of sample are needed to cover the stainless-steel ring and glass prism illuminated by a yellow LED. Simple calibration is performed with distilled or deionized water. A large dual-line display, few-key operation, BEPS battery-error prevention, automatic shut-off after three minutes of non-use and an IP65 housing support reliable field and laboratory work. This compact instrument from manufacturer Hanna Instruments measures 192 × 102 × 67 mm, weighs 420 g, runs on one 9 V battery for approximately 5000 operating hours, and is supplied as a single unit.
This article is part of Refractometers & polarimeters, in Spectroscopy & photometry.
Key features
- Pack size: 1 pc
- Salinity ranges: 0–50 PSU; 0–150 g/L (ppt); 1,000–1,114 SG
- Resolution: 1 PSU; 1 g/L (ppt); 0,001 SG
- Accuracy: ±2 PSU; ±2 g/L (ppt); ±0,002 SG
- Min. sample volume: 2 drops
- Housing: IP65, stainless-steel sample well
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Questions about Digital refractometer for Seawater analysis
What is this article?
Digital refractometer for Seawater analysis is the article on this page. Luminix Health distributes Hanna Instruments for laboratory use. It sits in Refractometers & polarimeters, inside Spectroscopy & photometry, in Lab instruments.
A refractometer reads the refractive index of a liquid, often expressed as Brix for sugar. A polarimeter reads the rotation of polarised light. Both depend on temperature. A handheld refractometer and a thermostated benchtop instrument are different accuracies.
A photometer or spectrophotometer sends light through a sample and reads how much was absorbed. In the range where the Beer–Lambert relation holds, absorbance tracks concentration. A refractometer reads how a liquid bends light, which tracks dissolved solids. A polarimeter reads the rotation of polarised light, the classical measurement for sugars. The lamp, the wavelength and the cuvette path length are the three things that have to be right before the number means anything. The optical quantities trace to NIST and the BIPM.
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The category is Spectroscopy & photometry. The sub-category is Refractometers & polarimeters. The catalogue is Lab instruments.
Shelves beside this one are Photometers & spectrophotometers and Lamps, cuvette holders & accessories.
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The seven catalogues are Labware, Lab chemicals, Lab instruments, Lab consumables, Chromatography equipment, Lab safety equipment and Life Science & Microbiology.
