Help with Refractometers specifications:
Performance Specifications
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| Measurement Scale | |||
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| RI Detector | The refractive index (RI) is a constant for a given pair of materials. It can be defined as the speed of light in material A divided by the speed of light in material B. It is the ratio of the velocity of light in a vacuum to its velocity in the substance. It is also the ratio of the sine of the angle of incidence to the sine of the angle of refraction ASTM D642. There are no units associated with the index of refraction. | ||
| Brix Detector | Brix is a sugar industry term which relates the weight of total solids to the weight of solids + water. Relationship between Brix and Conductivity: 70 Brix at 60°C = 8 mS/cm. On the Brix scale graduations are equal to the percent by weight of sucrose in solution at standard temperature. | ||
| Other | Other unlisted measurements including high fructose corn syrup (HFCS), energy per gram of solution, dissolved solids concentration, total titratable alkali content, etc. | ||
| Search Logic: | All products with ANY of the selected attributes will be returned as matches. Leaving all boxes unchecked will not limit the search criteria for this question; products with all attribute options will be returned as matches. | ||
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| RI Range | The ratio of the velocity of light in a vacuum to the velocity in some medium. Refractive index generally increases with the concentration of the sample. There are no units associated with the index of refraction. | ||
| Search Logic: | User may specify either, both, or neither of the "At Least" and "No More Than" values. Products returned as matches will meet all specified criteria. | ||
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| RI Accuracy |
The instrument accuracy specified in  . There are no units associated with the index of refraction.
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| Search Logic: | All matching products will have a value less than or equal to the specified value. | ||
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| Brix Range | Brix is a sugar industry term which relates the weight of total solids to the weight of solids + water. Relationship between Brix and Conductivity: 70 Brix at 60°C = 8 mS/cm. On the Brix scale graduations are equal to the percent by weight of sucrose in solution at standard temperature. | ||
| Search Logic: | User may specify either, both, or neither of the "At Least" and "No More Than" values. Products returned as matches will meet all specified criteria. | ||
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| Brix Accuracy |
The instrument accuracy specified in %.
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| Search Logic: | All matching products will have a value less than or equal to the specified value. | ||
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| Optical Wavelength Range | The range of the wavelength of light refracted by the prism in the refractometer. | ||
| Search Logic: | User may specify either, both, or neither of the limits in a "From - To" range; when both are specified, matching products will cover entire range. Products returned as matches will meet all specified criteria. | ||
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| Operating Temperature | This is the full required range of ambient operating temperature. | ||
| Search Logic: | User may specify either, both, or neither of the limits in a "From - To" range; when both are specified, matching products will cover entire range. Products returned as matches will meet all specified criteria. | ||
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Mounting
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| Monitoring | |||
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| Continuous | The refractometer is part of a process line and continuously monitors samples. | ||
| Sample | The samples are individually injected into the refractometer for analysis. The refractometer is not part of a process line. | ||
| Search Logic: | All products with ANY of the selected attributes will be returned as matches. Leaving all boxes unchecked will not limit the search criteria for this question; products with all attribute options will be returned as matches. | ||
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| Mounting | |||
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| Handheld | The instrument can be held in the operator's hand. | ||
| Portable | The instrument can be moved, but is not necessarily handheld. | ||
| Permanent or Fixtured | The instrument is mounted or fixtured in place for long term use. | ||
| Search Logic: | All products with ANY of the selected attributes will be returned as matches. Leaving all boxes unchecked will not limit the search criteria for this question; products with all attribute options will be returned as matches. | ||
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User Interface
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| User Interface | |||
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| Analog Display / Interface | The instrument has an analog display or control panel. Analog display would consist of a meter or simple indicator. Analog control panel consists of analog user inputs such as potentiometers, dials, switches, for adjustment of output, ranges, etc. | ||
| Digital Readout / Interface | The machine uses a digital display or control panel. Digital displays provide a discrete numeric or alphanumeric visual output such as LED or LCD displays. Digital control panels have digital keypads or menus for programming. | ||
| Video / Graphic Display | The data is presented in video or graphic form via CRT, LCD, or other multi-line forms. | ||
| Computer Interface | Can be controlled or monitored remotely with a computer via interface. | ||
| Other | Other unlisted display or user interface. | ||
| Search Logic: | All products with ANY of the selected attributes will be returned as matches. Leaving all boxes unchecked will not limit the search criteria for this question; products with all attribute options will be returned as matches. | ||
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Features
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| Features | |||
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| Alarms | The device contains an intrinsic audible, visual, or other notifying device. This does not include simple switches or relay closures. | ||
| Application Software Included | Software is provided for test control, monitoring, data acquisition, analysis and/or quality control (SPC). | ||
| Automatic Temperature Compensation | The refractive index of a sugar solution changes with temperature while its solid content remains the same. The error due to temperature variation is of the magnitude of up to 2 BRIX° error. The ATC corrects for this error. Thus, the RI of the solution shown by the refractometer is the RI of that solution after compensating for temperature. | ||
| Measures Temperature | The instrument is also capable of measuring temperature. It has a thermistor or other temperature-measuring element. | ||
| Temperature Controlled | In some applications the sample temperature must be controlled either by the refractometer or a circulating water bath to get a stable and correct reading. If the refractometer has a thermostat the temperature can be controlled. | ||
| Prism Wash System | For any refractometer it is necessary to keep the prism surface clean. A prism wash system will clean the prism without having to remove it from the refractometer. | ||
| Programmable | The device must be programmable, or adjustable, to provide for different ranges, materials, levels, outputs, etc. | ||
| Sanitary | The device must be certified by a national or international organization (USDA, FDA, UNICEF, etc.) for use in a sanitary environment such as in medical or food processing applications. | ||
| Self-calibration | The device is capable of calibrating itself. | ||
| Search Logic: | All products with ANY of the selected attributes will be returned as matches. Leaving all boxes unchecked will not limit the search criteria for this question; products with all attribute options will be returned as matches. | ||
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