Rudolph J257 Refractometer (Refraktometer) with Wide-Range Measurement
Application
Rudolph Research’s J257 is designed as a multipurpose refractometer for a broad range of (RI) refractive index measurement applications.
The wide refractive index range of 1.26-1.70 means that this instrument can measure many materials that a refractometer with only a food refractive index range of 1.33-1.53 cannot.
Operation
Operating the Rudolph J257 is as simple as placing a sample on the prism, closing the cover and reading the digitally displayed
result — all in just a few seconds. Being fully automatic there there are no shadow lines to match and there is no eyepiece
requiring any kind of operator determination or manual adjustment. When the “measure when stable” mode is selected, the J257
automatically waits until the sample has been heated or cooled to a predefined temperature before initiating a measurement.
Interface
A large 7.5cm x 10cm cold cathode fluorescent back lit, digital LCD allows the scale, sample temperature, set temperature,
air temperature, time, date, and temperature correction status to be easily viewed. All functions are activated through a touch screen panel that will not
wear out or get misplaced like traditional or detachable keyboards. The durable touch screen is resistant to fingernails, sharp objects, chemicals, and acids.
Dual Temperature Control System
Unlike other temperature controlled refractometers, the J257 has temperature control from both above and below the sample.
The sample cover is controlled to the same temperature as the prism and, when lowered, is designed to provide a temperature
controlled micro-environment that provides unrivaled temperature stability, fast measurement time, and minimal evaporation.
Depending on options, the sample cover can also be used to initiate measurement. This means that the operator never even
needs to touch the refractometer screen on a day-to-day basis, simply lower the cover and measurement starts automatically.
Optional Sample Presser
The J257 is available with an optional Temperature Controlled Sample
Presser that touches the sample.
Compared with the standard temperature controlled
Cover, the optional
Presser reduces the empty volume of the measurement area thereby decreasing
evaporation and at the same time helping to evenly spread semi-solid materials
over the measurement prism. This feature offers improved refractive index (RI) readings on a wide range of often hard to measure samples.
Calibration
The Rudolph J257 Refractometer offers 1 pt, 2 pt, or a full multi-point calibration. Calibration can be done at 20°C, 25°C or any user selectable temperature within the available range.
Regardless of how many times the refractometer has been calibrated, it can always be restored to the initial factory calibration if required.
User Configurable
Versatile laboratory instruments have the advantage of being able to display a lot of information, however this versatility can also lead to confusion,
with extra buttons and by forcing the operator to interpret extra information that may have no relevance to their application. The J Series customizable
display allows the instrument to be configured to exactly what is required for each application. The customizable keypad can be “locked out” or just a few keys can be operable, i.e.
the measure key, print key, zero key, customer specified sample keys or any combination thereof. The lockout function, calibration and other functions are all password protected.
Durability
The Rudolph J Series refractometers are rugged, laboratory instruments offering a sapphire prism for high mechanical and chemical durability.
The sample well is made of acid resistant 316 stainless steel with a
Techtron sealing ring. There is no lamp to change, the LED light source is guaranteed for 1,000,000 measurements.
Options and Accessories
-
NIST traceable calibration liquids
- IQ/OQ/PQ package
- Acid resistant sample well and plate
- Printer
- Pre-programmed custom scale
- Data capture software
- Small volume, easy to clean sample well
- Different measurement wavelengths
- Barcode reader
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Measurement Scales
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Refractive Index (RI) BRIX (% sucrose) Temperature Corrected BRIX Temperature Corrected RI 10 User Programmable Scales
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Measurement Range
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1.26 - 1.70 RI,0 - 95 BRIX
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Resolution
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0.0001 RI 0.01 BRIX
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Reproducibility
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±0.0001 RI, ±0.1 BRIX
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Accuracy
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±0.0001 RI, ±0.1 BRIX
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Optical Wavelength
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589.3nm
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Prism
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Artificial Sapphire
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Light Source
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Light Emitting Diode (est. life: >100,000 hrs.)
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Response Time
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Continuous readout or user programmable delay (i.e. a 25ºC sample can be cooled to 20ºC and measured in 20 seconds)
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Communication Interface
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Two RS232 ports One parallel printer port One auxiliary port
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Analog Control
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0-10 volts, 4-20 mA
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Temp. Control Range
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10ºC - 40ºC10ºC - 70ºC optional
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Temp. Sensor Accuracy
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±0.05ºC
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Ambient Temp. Limit
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10ºC - 40ºC
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Temp. Correction Range
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18ºC - 40ºC (for pure sucrose solutions)
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Temp. Measurement &Control
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Prism surface and presser
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Calibration
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1, 2 or full multi-point calibration
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Operating Dimensions
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L: 15.25" W: 10" H: 4.5" / 23 lbs.
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Shipping Dimensions
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L: 26" W: 21" H: 16" / 30 lbs.
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Power Requirements
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100-240 volts, 50 Hz - 60 Hz
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무단수집및 복재를 금합니다 .
상품정보고시
| 제품명 |
Rudolph 굴절계 (J257 Automatic Refractometer) |
| 판매가격 |
29,700,000원 |
| 브랜드 |
Rudolph |
| 원산지 |
USA |
| 제조사 |
Rudolph (루돌프) |
