ST-138C fully automatic refractive index meter with Peltier dual temperature control LED replaces the traditional sodium lamp

The ST-138C 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. The fully automatic refractometer is widely used in the oil industry, pharmaceutical industry, food industry, daily chemical industry, sugar industry, etc. It is also one of the commonly used devices in schools and related research institutions.

Main features
● 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;
● Complies with 21CFR Part 11 audit trail, pharmacopoeia and electronic signature, and meets the functions of the pharmacopoeia and FDA;
● Supports network printing and data statistics and retrieval;
● Multi-level permission management, with freely configurable permissions;
● 7-inch touch color screen with a user-friendly operation interface;
The entire machine has passed TART and CE certifications.
● Determination of Refractive Index in General Chapter 0622 of the 2020 Edition of the Chinese Pharmacopoeia
Main technical indicators
● Range: 1.30000- 1.70000(nD)
● Test modes: Refractive index, sugar content, hammer content, refractive index
● Resolution: 0.00001
● Calibration points: Multi-point fitting system
● Sugar content range: 0-100% (Brix
● Sugar content accuracy: ±0.05%(Brix
● Temperature control method: Peltier temperature control
● Temperature control range: 5℃-85℃
● Temperature control stability: ±0.02℃
● Display mode: 7-inch touch color screen
● Light source: LED light source
● Data export: PDF, EXCEL
● Wavelength: 589nm
● Prism: Sapphire grade
● Sample cell: Stainless steel
● Detection method: High-resolution linear array CCD
● Output methods: USB,RS232, RJ45, SD card, USB flash drive
● User Management: Three-level permission management, with freely configurable permissions
● Audit Trail: Yes
● Network: Wireless WIFI connection
● Printer: Wireless laser printing
● Electronic signature: Yes
● Data storage: 32G
● Power supply: 220V/50HZ
● Data tamper-proof MD5: Yes
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​

Shandong Shengtai Instruments Co., Ltd. is specialized in the research and production of experimental testing instruments and industrial testing instruments. It is a professional instrument company integrating instrument research and development, manufacturing, sales and service. Its products are widely used in food, flour, grain and oil, Feed, electricity, petrochemical, industrial oil, aerospace, coal quality and other industries.

For more than 10 years, Shengtai has always been adhering to the "first-class service, customer first" as the purpose, "reasonable price, honesty and trustworthiness" as the business policy. Adhere to technical innovation, with rich knowledge of the technical team and experienced, thoughtful after-sales service team.

Shengtai instrument as one of the most large-scale and competitive enterprises in the industry, with the strength of technology research and development, professional technical knowledge and innovative design concept, in the model improvement, Significant technical breakthrough has been achieved in the development of function expansion and intelligent control system.