Contact Lens Refractometer
The Rudolph Research Analytical J457 CLR for contact lens measurement
Refractometer for contact lens measurement
Easy loading
Soft positioning
Variable pressure
Refractometer for Contact Lenses
The J457CLR contact lens refractometers are designed for measurement of contact lenses both hard and soft as well as accurately checking saline solutions and are an ideal replacement for the Index Instruments CLR 12-70 contact lens refractometer. The instrument is available in two versions:
- FC model comes with a Rudolph supplied display, nothing needs to be added, the user simply removes it from the box and connects to power. If the user wants transfer results to a PC they can but they do not have to
- CB model comes with a USB connection cable and software. Thus, ready to be connected to a user supplied PC. All results automatically save on that PC
Easy Loading
Soft contact lenses are easy to tear and hard to position correctly. The J457 positions the loading low and directly in front of the operator making it easy to position the lens with the hands in a supported position.
Soft Positioning
The J457 has a soft positioning device that gently lowers the contact lens into the measuring position and minimizes changes due to compression.
Variable Pressure
An adjustable weight system allows a user to choose the amount of pressure to put on the contact lens and then put that same amount of pressure on every time.
Small Measuring Spot (MIO)
A conventional J457 measures along a strip a few mm long. An application like a contact lens in saline where there are different refractive indices requires a much smaller measuring spot, The MIO optics uses a different focusing system to create that smaller spot.
Try Before You Buy
The J457 CLR is available for a short term trial.
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Specification
Measurement Scales: Refractive index (nD), Brix (% Sucrose) and up to 100 custom programmed scales
Measurement Range: Refractive index 1.26 – 1.72, Brix 0 – 100
Accuracy: Refractive Index ±0.00002, Brix 0.015
Reproducibility: Refractive Index ±0.00002, Brix 0.015
Resolution: Refractive index 0.00001, Brix 0.01
Temperature Control Range: 10°C to 110°C (wider temperature range available dependent on ambient conditions and options) temperature control by dual Peltier system; boost option to 120°C available
Temperature Control Reproducibility: ±0.01°C
Ambient Temperature Limit: 5°C to 40°C
Temperature Correction Range: 4°C to 95°C (for sucrose solutions)
Sample Temperature Limit: -20°C to 250°C
Optical Wavelength: 589.3nm (NaD line)
Response Time: User configurable, generally less than 30 seconds
Calibration: Using water or NIST traceable fluids, factory default calibration can always be reset
Prism: Artificial sapphire
Optics: Minimum illumination (MIO)
Holder: Specific for contact lenses
Acid Resistance: Optional Hastelloy measurement surface
Data Storage / Internal Memory: 32 GB non-removable compact flash
Display: Adjustable 10.4 inch diagonal, 800-600 pixels, colour flat panel monitor with desistant touch screen interface, 400 nits brightness, gasketted for spill protection
User Interface: Touchscreen
Communication Interface: 3 USB, RS232 and Cat5 network (Ethernet)
Power Requirements: 100 – 240 volts, 50 Hz – 60 Hz
Dimensions: L: 43.5cm W: 30.5cm H: 33cm
Weight: 10.4 kg