Refractometer
Professional Refractometer for Accurate Measurements
A refractometer is an essential optical instrument used to measure the refractive index of liquids, gases, and translucent solids. Our high-precision refractometers provide laboratory-grade accuracy for industrial, agricultural, and scientific applications.
Key Features
- Precision optics with anti-reflective coating
- Automatic Temperature Compensation (ATC)
- Wide measurement range from 0-95% Brix
- Durable aluminum alloy housing
- Waterproof design for challenging environments
- LED illumination for low-light conditions
Technical Specifications
| Parameter | Specification |
|---|---|
| Measurement Range | 0-95% Brix |
| Resolution | 0.1% Brix |
| Accuracy | ±0.2% Brix |
| Temperature Range | 10-30°C (50-86°F) |
| ATC Range | 10-30°C (50-86°F) |
| Dimensions | 175×80×35mm (6.9×3.1×1.4in) |
| Weight | 300g (10.6oz) |
Applications
- Food and beverage quality control
- Agriculture and horticulture
- Automotive fluids testing
- Chemical industry
- Pharmaceutical manufacturing
- Research and education
Refractometer FAQ
How does a refractometer work?
A refractometer measures how light bends as it passes through a substance, known as the refractive index. The device uses an internal prism and light source; when a sample is placed on the prism, light passes through both materials. The bending of this light is measured against a calibrated scale, providing a reading of the sample's concentration or purity.
What maintenance does a refractometer require?
Regular maintenance includes cleaning the prism with distilled water and a soft cloth after each use, avoiding abrasive materials that could scratch the surface. Periodic calibration with distilled water (zero point) and a standard solution is recommended. Store the refractometer in its protective case when not in use and avoid extreme temperatures or humidity that could damage the optics.
Can refractometers measure different types of liquids?
Yes, but different refractometers are optimized for specific applications. Standard refractometers measure sugar content (Brix) in fruits and beverages, while specialized models exist for honey, saltwater (salinity), automotive fluids, and urine (medical applications). Always verify your refractometer's measurement scale matches your intended application.
Measurement Scales Comparison
| Scale Type | Application | Typical Range |
|---|---|---|
| Brix | Sugar content in fruits, juices | 0-95% |
| Salinity | Saltwater aquariums, marine biology | 0-100‰ |
| Specific Gravity | Automotive fluids, brewing | 1.000-1.130 |
| Plasma Protein | Veterinary medicine | 5-12g/dL |
Why Choose Our Refractometer?
Our refractometers combine German optical technology with rugged construction for reliable performance in demanding environments. The automatic temperature compensation ensures accurate readings without manual adjustments, while the scratch-resistant prism maintains measurement precision over years of use. Each unit comes with a comprehensive 3-year warranty and dedicated technical support.
Refractometer Calibration Guide
- Clean the prism surface with distilled water and a soft cloth
- Apply 2-3 drops of calibration solution (typically 10% or 20% Brix)
- Close the daylight plate gently to spread the liquid evenly
- Allow 30 seconds for temperature stabilization
- Look through the eyepiece and adjust the calibration screw until the reading matches the known value
- Repeat with distilled water to set the zero point if necessary
Refractometer FAQ (Continued)
How often should I calibrate my refractometer?
For critical applications, calibrate before each use. For routine measurements, weekly calibration is sufficient. Always recalibrate if the instrument is subjected to temperature extremes or physical shock. Many professional users maintain a calibration log documenting dates, standards used, and any adjustments made.
What's the difference between analog and digital refractometers?
Analog refractometers use optical prisms and require visual reading of scales, offering durability and no battery dependence. Digital models provide numeric displays with higher resolution (typically ±0.1% vs ±0.2% for analog), often include data logging, but require power sources. Choose analog for field use and digital for laboratory precision.
Can I measure viscous samples with a refractometer?
Yes, but viscous liquids like honey or syrup require special handling. Warm the sample to reduce viscosity (without overheating), use the included spatula to spread evenly on the prism, and allow extra time for temperature stabilization. Some high-end refractometers include viscosity compensation algorithms for more accurate readings with thick fluids.
Accessories Included
- Hard carrying case
- Calibration screwdriver
- Pipette for sample loading
- Cleaning cloth
- Instruction manual
- Certificate of calibration
Industry Standards Compliance
Our refractometers meet or exceed the following standards: ISO 7886, AOAC 932.14, ICUMSA GS 1/3-7, OIML R 124, and USP <851>. The optical system is traceable to NIST standards, ensuring measurement integrity for quality control and regulatory compliance.