Hanna Instruments HI 96822 Refractometer for Measuring Salinity of Natural and Artificial Seawater

• Ability to calibrate with distilled or deionized water, no buffer solutions necessary.
• Large LCD screen, for readability.
• Waterproof, for using both indoors and outdoors.
• Automatic temperature compensation (ATC), to eliminate need for extra calculations.
• Auto-off, to prolong battery life.

The Hanna Instruments HI 96822 refractometer is a portable meter for measuring salinity levels in natural and artificial waters. The refractometer measures the refractive index of water samples in order to display salt content, with results available within seconds. To take a reading, the sample well must be calibrated with distilled or deionized water, followed by a few drops of the sample liquid. A dual-level LCD screen displays the measurement and temperature within several seconds. The HI 96822 converts the refractive index of the sample to one of three popular units for measuring salinity: Practical Salinity Units (PSU), Salinity in parts per thousand (ppt), or Specific Gravity (S.G. [20/20]). The 9V battery-operated device utilizes a yellow LED as a light source, and automatically powers off after three minutes of non-use. The HI 96822 has a range of 0 to 50 PSU, 0 to 150 ppt, or 1.000 to 1.114 specific gravity and automatic temperature compensation between 10 and 40 degrees C (50 to 104 degrees F). Refractometers measure refractive index, which is the optical characteristic of a substance and the number of dissolved particles. Refractive index is the ratio of the speed of light in empty space to the speed of light in the substance. Refractometers are used to ensure proper salinity levels in natural and artificial waters. Hanna Instruments manufactures a wide variety of analytical instrumentation, including pH meters, multi-parameter meters, electrodes, reagents, and buffer solutions. Founded in 1978, Hanna is headquartered in Woonsocket, RI, with subsidiaries in 32 countries. Hanna Instruments holds many firsts in the field of analytical instrumentation, including a pH electrode with a built-in temperature sensor, an electronic pocket-sized pH tester, and a replaceable electrode pH pocket tester. To assure the quality of its products, Hanna is a vertically integrated manufacturer and does not subcontract any part of its manufacturing. What’s in the Box? * HI 96822 refractometer * One 9V battery * Instructions