refractometer

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refractometer

 [re″frak-tom´ĕ-ter]
1. an instrument for measuring the refractive power of the eye.
2. an instrument for determining the indexes of refraction of various substances, particularly for determining the strength of lenses for spectacles.

re·frac·tom·e·ter

(rē'frak-tom'ĕ-ter),
An instrument for measuring the degree of refraction in translucent substances, especially the ocular media. See: refractive index.
[refraction + G. metron, measure]

refractometer

/re·frac·tom·e·ter/ (re″frak-tom´ĕ-ter)
1. an instrument for measuring the refractive power of the eye.
2. an instrument for determining the indexes of refraction of various substances, particularly for determining the strength of lenses for spectacles.

refractometer

[rē′frəktom′ətər]
Etymology: L, refringere, to break apart; Gk, metron, measure
an instrument for measuring the refractive index of a substance, used primarily for measuring the refractivity of solutions. See also refractive index.

re·frac·tom·e·ter

(rē'frak-tom'ĕ-tĕr)
An instrument for measuring the degree of refraction in translucent substances, especially the ocular media.
See also: refractive index
[refraction + G. metron, measure]

refractometer 

1. An instrument for measuring the refractive index of transparent objects. There exist several types: Abbé's refrac-tometer, which is based on the measurement of the critical angle at the interface between a sample and a prism of known index of refraction and uses white light whereas that of Pulfrich, which is based on the same principle as Abbé's, uses monochromatic light. As the refractive index of some materials is related to their water content, the handheld Atago CL-1 Soft lens Refractometer has been calibrated to provide a reading of the percentage of water content of soft contact lenses.
2. See optometer.

refractometer

1. an instrument for measuring the refractive power of the eye.
2. an instrument for determining the indexes of refraction of various substances.
3. an instrument for measuring the concentration of solutes, e.g. protein in solutions, immunoglobulins in serum.
References in periodicals archive ?
The usefulness and limitations of handheld refractometers in veterinary laboratory medicine: an historical and technical review.
The THP concentration was determined using a Reithert VET 360 analog blood animal protein refractometer and was measured in grams per 100 mL.
As any grower and winemaker knows, however, sampling methods can have a large impact on readings, particularly with the small samples employed in refractometers.
In this publication the term total reflectometer is consistently used for all refractometers which are based on the measurement of the critical angle of total reflection for the determination of the index of refraction.
If it does not address a non-urine sample, purchase a refractometer that is validated for non-urine samples, or perform an in-house assessment to meet the regulatory requirements.
Refractometers of excellent quality are still available through food service equipment catalogues for about $150.
In one institution, standard practice was to measure specific gravity using the refractometer.
Thanks to a 1,024 element detector array," boasts Michael Caminer, MISCO Director of Marketing, "measurements are made with a precision comparable to mid-range bench-top laboratory refractometers costing thousands of dollars more, yet it still fits in the palm of your hand
Maselli's UR15 automatic process refractometer (Maselli Measurements, Stockton, Calif.
Mettler-Toledo's LiquiPhysics Excellence density and refractometers are simple to operate, sophisticated and secure, making them suited for stress-free compliance within the pharmaceutical industry's regulatory demands.
As with the other PAL digital refractometers, the user simply has to place a small amount of liquid (0.
The Abbe refractometers sold today operate similarly to their predecessors, using the density of a sample to determine its refraction qualities.