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| Brand Name: | Shengtai Instrument |
| Model Number: | ST-138B |
| MOQ: | 1 carton |
| Payment Terms: | T/T |
| Supply Ability: | 30 cartons per week |
ST-138B The High-Performance Peltier temperature control Refractometer for Oil Testing Equipment
The ST-138B fully automatic refractometer (refractive index meter) is equipped with high-performance linear array CCD light-sensitive components. Through high-speed and high-precision signal acquisition and analysis processing technology, it is also equipped with a semiconductor Paltier super temperature control system. It can efficiently and precisely measure the refractive index (nD) of various liquids such as transparent, semi-transparent, dark, and viscous ones, as well as the mass fraction (Brix) of sugar solutions.
It complies with the determination of refractive index in General Chapter 0622 of the 2025 Edition of the Chinese Pharmacopoeia, as well as GB 15680-2009 Palm Oil, GB1535 Soybean Oil, GB/T 1536-2021 Rapeseed Oil, GB/T8233-2018 Sesame Oil, GB/T 23347-2021 Olive Oil, and GB/T 19111-2017 Determination of Refractive Index of Edible oils such as corn oil and GB/T22479 pepper seed oil, and compliance with GB/T 614-1988
General Method for Determining the refractive index of Chemical Reagents. It is widely used in the oil industry, pharmaceutical industry, food industry, daily chemical industry, sugar industry, etc., and is also one of the commonly used equipment in schools and related research institutions.
Main features and technical parameters:
● Built-in Peltier temperature control to enhance accuracy and stability;
● Domestic dual temperature control, sapphire prism;
● LED cold light sources replace traditional sodium lamps and halogen tungsten lamps;
● 7-inch touch color screen with a user-friendly operation interface;
● Range: 1.3000- 1.7000(nD)
● Test modes: Refractive index, sugar content, hammer content
● Resolution rate: 0.0001
● Precision: ±0.0002
● Display mode: 7-inch touch color screen
● Sugar content range: 0-100% (Brix
● Sugar content accuracy: ±0.05%(Brix
● Temperature control range: 5℃-65℃
● Temperature control accuracy: ±0.03℃
● Light source: LED light source
● Wavelength: 589nm
● Prism: Sapphire grade
● Sample cell: Stainless steel
● Detection method: Linear array CCD
Note: The appearance pictures, dimensions, volume and weight of the instrument are for reference only. If the instrument is updated, there may be minor changes. No further notice will be given.
The refractive index of common edible oils
Product Name |
Refractive Index (n40) |
| Peanut oil | 1.460- 1.465 |
| Soybean oil | 1.466- 1.470 |
| Rapeseed oil (generally) | 1.465 to 1.469 |
| Low erucic acid rapeseed oil | 1.465- 1.467 |
| Coconut oil | 1.448- 1.450 |
| Corn oil | 1.456- 1.468 |
| Walnut oil | 1.467- 1.482 |
| Sesame oil | 1.465- 1.469 |
| Rice bran oil | 1.464- 1.468 |
| Cottonseed oil | 1.458- 1.466 |
| Grape seed oil | 1.467- 1.477 |
| Camellia oleifera seed oil | 1.460- 1.464 |
| Safflower seed oil | 1.467- 1.470 |
| Sunflower seed oil | 1.461- 1.468 |
| Palm oil (50℃) | 1.454- 1.456 |
| Flaxseed oil (n20) | 1.4785-1.4840 |