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Atago 3355 Digital Suction-Type HSO Refractometer, QR-HSO, Sulfuric Acid 0.0 to 35.0% Measurement Range
This model is specifically designed for measuring sulfuric acid, which makes it ideal for a wide-range of applications in the industrial or pharmaceutical industries.The QR-HSO allows users to easily measure the concentration of sulfuric acid without coming in contact with this highly corrosive acid.Cleaning and zero-setting can be done with tap water.
Specifications
Model | QR-HSO |
Cat.No. | 3355 |
Scale | Sulfuric Acid Temperature |
Measurement Range | Sulfuric Acid : 0.0 to 35.0% Temperature : 5 to 40°C |
Resolution | Sulfuric Acid : 0.1% Temperature : 0.1°C |
Measurement Accuracy | Sulfuric Acid : ±0.3 % Temperature : ±1°C (with sucrose solution) |
Temperature compensation range | 5 to 40°C (Automatic Temperature Compensation) |
Ambient Temperature | 5 to 40°C |
Sample Volume | At least 2mL |
Materials | Body: ABS resin Sample chamber cover: AS resin |
Measurement Time | Approximately 3 seconds |
Power Supply | 006P dry battery (9V) |
International Protection Class | IP64 |
Dimensions & Weight | 70 x 40 x 210 mm (without nozzle) Nozzle: 240mm 300g |


![]() | Compact and easy to carry |
![]() | Calibration with water |
![]() | Battery operated |
![]() | Digital display |
![]() | Automatic Temperature Compensation |
Sulfuric acid (alternative spelling sulphuric acid), also known as oil of vitriol, is a mineral acid composed of the elements sulfur, oxygen and hydrogen, with molecular formula H2SO4. It is a colourless, odourless, and viscous liquid that is soluble in water and is synthesized in reactions that are highly exothermic.
Its corrosiveness can be mainly ascribed to its strong acidic nature, and, if at a high concentration, its dehydrating and oxidizing properties. It is also hygroscopic, readily absorbing water vapour from the air. Upon contact, sulfuric acid can cause severe chemical burns and even secondary thermal burns; it is very dangerous even at lower concentrations.
Sulfuric acid is a very important commodity chemical, and a nation's sulfuric acid production is a good indicator of its industrial strength. It is widely produced with different methods, such as contact process, wet sulfuric acid process, lead chamber process and some other methods]
Sulfuric acid is also a key substance in the chemical industry. It is most commonly used in fertilizer manufacture, but is also important in mineral processing, oil refining, wastewater processing, and chemical synthesis. It has a wide range of end applications including in domestic acidic drain cleaners, as an electrolyte in lead-acid batteries, in dehydrating a compound, and in various cleaning agents.
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Measurement RangeSulfuric Acid : 0.0 to 35.0%
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Resolution0.1%
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Measurement Accuracy±0.3 %
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Measurement Temperature (°C)5 to 40
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UseSulfuric Acid
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International Protection ClassIP64
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ManufacturerAtago Co Ltd
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Country of OriginJapan
Icons, for functions, specifications and scales have been added to this catalogue
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