Antifreeze Refractometers

Low temperatures leading to freezing conditions can

, if not managed correctly, often result in serious damage to plant and equipment, chillers and engine cooling systems. System blockages, cracked pipes and unwanted fluid loss can be expensive both in terms of operational down-time and ultimate repair or replacement costs. It is therefore essential that systems are properly protected and antifreeze levels are periodically tested. Testing of antifreeze concentrations for automotive and industrial applications has been made easier by the use of antifreeze refractometers.

The antifreeze/battery refractometer is designed for testing the refractive index or concentration of battery fluids, antifreeze liquid and cleaning fluids that works on the critical angle principle. Antifreeze refractometers utilize lenses and prisms to project a shadow line onto a small glass reticule inside the instrument, which is then viewed by the user through a magnifying eyepiece.

In use, a sample is sandwiched between a measuring prism and a daylight plate. The reading is taken when a shadow line crosses the scale from the shadow line formed between the illuminated area and the dark area then a shadow line crosses the scale. With the indication of the percentage you may know which temperature the fluid will be frozen for both propylene glycol and ethylene glycol. It can also be used for checking the strength of electrolyte solution batteries.

Refractometers represent the most accurate conventional testing method available for determining freeze point and concentration of engine coolants and antifreeze solutions. Don't be misled by hydrometers or freeze-point test strips, which are not accurate enough to be useful.

One of the best instruments to test these solutions is the ATAGO Antifreeze Refractometer model Master BCF. This refractometer has an exclusive scale for measuring specific gravity of battery fluid and for checking the freezing temperature of ethylene glycol and propylene glycol which are used as antifreeze mixture in automobiles, thermal catalyst for solar power systems and other industrial applications. The Master BCF is easy to use and accurate for testing in the field.

by: Kathy Brasch

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