LAXCO

LAXCO analog handheld refractometers for Brix measurement offer accuracy specifications of ±0.1% or ±0.2%, depending on the model. For example, the RLB-10ATC and RHE-B10ATC provide ±0.1% accuracy, while the RHB-18 offers ±0.2% accuracy. These instruments are designed for direct reading of sugar concentration in solutions, with resolution typically at 0.1% Brix. The accuracy is maintained across the specified refractive index range, such as 0–10% Brix or 0–18% Brix, and is supported by automatic temperature compensation on ATC models to reduce errors from temperature variation.

LAXCO analog handheld refractometers typically require initial calibration using distilled water as a reference standard. The user adjusts the instrument to read zero on the scale when the prism is cleaned and distilled water is applied. For models with automatic temperature compensation (ATC), calibration should be performed at the ambient temperature to ensure the compensation mechanism functions correctly. Periodic recalibration is recommended if the instrument is subjected to temperature extremes, physical shock, or if readings drift. The calibration process is manual and does not require specialized tools, making it suitable for field use.

LAXCO refractometers with manual temperature compensation require the user to adjust a correction factor based on the ambient temperature, typically using a built-in thermometer or separate reference. Models with automatic temperature compensation (ATC) incorporate a bimetallic strip or similar mechanism that automatically adjusts the reading to account for temperature variations within a specified range (usually 10–30°C). ATC models, such as the RHE-S10ATC or RHA-200ATC, provide more consistent results in fluctuating environments without user intervention. Manual compensation models, like the RHB-18, are simpler in construction and may be preferred for stable temperature conditions or when cost is a primary consideration.

Yes, certain LAXCO refractometer models are designed to measure freeze points of both ethylene glycol and propylene glycol. For example, the RHA-100ATC and RLA-100ATC provide accuracy of ±0.01 SG and resolution of 5°F for both ethylene glycol and propylene glycol freeze points. These instruments are commonly used in automotive and industrial cooling systems to check antifreeze concentration. The scale typically displays freeze point temperature in degrees Fahrenheit, along with specific gravity, allowing direct assessment of coolant protection levels. The ATC feature ensures accuracy across typical engine operating temperatures.

For serum protein measurement, LAXCO refractometers such as the RHE-C200ATC offer a resolution of 0.2 g/dL serum protein. This model also measures refractive index with an accuracy of ±0.0005 and specific gravity (urine) with a resolution of 0.001 SG. The instrument is designed for clinical and laboratory use to estimate total protein concentration in serum or plasma, as well as urine specific gravity. The analog scale provides direct readout without the need for electronic conversion, and automatic temperature compensation helps maintain accuracy during routine testing.

Yes, LAXCO offers a dedicated model for salinity measurement, the RHE-S10ATC, which provides an accuracy of ±1% salinity and a resolution of 0.1% salinity. This refractometer is designed for measuring salinity in aqueous solutions, including seawater, brine, and other saline environments. It also measures specific gravity with an accuracy of ±0.001 SG. The automatic temperature compensation feature ensures reliable readings across typical ambient temperature ranges, making it suitable for aquaculture, marine biology, and industrial water treatment applications.