Atago 3355 Digital Suction-Type HSO Refractometer, QR-HSO, Sulfuric Acid 0.0 to 35.0% Measurement Range

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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.

ScaleSulfuric Acid
Measurement RangeSulfuric Acid : 0.0 to 35.0%
Temperature : 5 to 40°C
ResolutionSulfuric Acid : 0.1%
Temperature : 0.1°C
Measurement AccuracySulfuric Acid : ±0.3 %
Temperature : ±1°C
(with sucrose solution)
Temperature compensation range5 to 40°C (Automatic Temperature Compensation)
Ambient Temperature5 to 40°C
Sample VolumeAt least 2mL
MaterialsBody: ABS resin
Sample chamber cover: AS resin
Measurement TimeApproximately 3 seconds
Power Supply006P dry battery (9V)
International Protection ClassIP64
Dimensions & Weight70 x 40 x 210 mm (without nozzle)
Nozzle: 240mm
Call 01463 830401 For Any Assistance
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.

    • SKU
    • Commodity Codes
  • Measurement Range
    Sulfuric Acid : 0.0 to 35.0%
  • Resolution
  • Measurement Accuracy
    ±0.3 %
  • Measurement Temperature (°C)
    5 to 40
  • Use
    Sulfuric Acid
  • International Protection Class
  • Manufacturer
    Atago Co Ltd
  • Country of Origin

Icons, for functions, specifications and scales have been added to this catalogue

Can be connected to a recorderMeasurement at a set temperature
Can be connected to a printerAutomatic Temperature Compensation
Alarm output for high- and low-limit valuesCan be connected to a circulating
RS232C InterfaceContinuous measurement
In-line measurementHigh temperature samples
User scales can be inputtedExternal Light Interference


Calibration with waterClinical refractometers
Calibration with exclusive standard liquidRefractive index scale
Compact and easy to carrySalt concentration scale
Digital displaySeawater scale
AC outlet (AC100 to 240V)Wine scale
Battery operated