ST149 Automatic Oxidation Stability Tester
ST149 automatic plant oil oxidation stability index (OSI) is
designed and manufactured in strict accordance with GB/T 21121-2007
determination of oxidation stability of animal and vegetable oils
(Accelerated oxidation test). It is controlled by a single chip
microcomputer and displayed by a liquid crystal LCD. The results
are automatically generated and printed
OSI (oxidative stability index): during the determination, hot air
at a certain temperature is introduced into the oil sample to
accelerate the oxidation of glycerol fatty acids and produce
volatile organic acids. The air brings the volatile organic acids
into a conductive chamber, and the indoor water dissolves the
volatile organic acids and ionizes ions, thus changing the
conductivity of the water. The computer continuously measures the
conductivity of the conductive chamber. When the conductivity rises
sharply, it indicates the arrival of the end of the induction
period, and the period before that becomes OSI time.
Controlled by single chip microcomputer, the time conductivity
curve of the sample can be drawn and the oxidation stability time
of the oil can be calculated automatically; The instrument has
sample measurement switch and status display.
Main application areas
● Plant oils and fats: soybean oil, sunflower seed oil, rapeseed
oil, palm oil, peanut oil, etc;
● Animal fats and oils: butter, fish oil, lard, etc;
● Oil containing products: cosmetics, margarine (directly
measured), cereal products, biscuits, nuts, bacon, sausages, meat,
etc. (measured after extracting oil);
● Research on the antioxidant properties of antioxidants;
● Determination of oxidation stability of FAME (fatty acid methyl
ester)
● Determination of stability of copper catalyst for light oil
oxidation
Technical Specifications
| Standard | GB/T21121 ISO 6886 AOCS Cd 12b-92 |
| Dispiay mode | 7-inch color LCD display |
| Heating method | Metal bath heating |
| Temp sensor | Imported PT100 temp sensor |
| Output format | CSV or Excel , USB |
| Heating module | single group heating or multiple group heating , Set the
temperature of each heating hole separately |
| Instrument size | 420 * 390 * 480mm |
| Instrument weight | 26kg |
| Package size | 560 * 400 * 530mm |
| Temp setting range | RT ~ 220 ℃ |
● Specialized diaphragm pump with precise flow control and constant
flow rate
● Real time measurement data of conductivity meter.
● Data display: Real time display of conductivity during oil
oxidation process and induction period
● The length of the induction period represents the stability of
the oil
● Storage method: The experimental results can store 1999 sets of
historical data for easy retrieval
● Result output: It can also be equipped with a USB drive output
function to output data to the PC for long-term storage
● It can be used for single machine touch screen experiments or
computer-controlled instruments for experiments
★ Input extension: barcode scanner can be selected to scan and
input sample number and other information (optional)
● Equipped with specialized calculation software, it can
automatically calculate the oxidation stability time
● Instrument display: The instrument itself has a color display
screen, which can display the temperature of each heating module,
gas flow rate, measurement cell status, and conductivity value of
each measurement position
Heating module
● Heating method: Metal bath heating
● Sample size: 3g (recommended by national standards)
● Temp control range: RT ～ 220 ℃
● Temp control accuracy: ± 0.1℃
● Protection function: It has over temperature protection function
and can automatically stop when the temperature exceeds 260 ℃.
● Temp control method: Four sets of temperatures can be
individually controlled, and the four sets of temperatures can be
set to the same temperature or different temperatures.
| Heating method | Metal bath heating |
| Sample size | 3g (recommended by national standards) |
| Temp control accuracy | ± 0.1℃ |
| Protection function | Overtemperature protection, Automatically stop when the temperature exceeds 260 ℃ |
Gas flow control module
● The instrument is equipped with a built-in diaphragm air pump
● Specialized electronic air flow pump
● Air flow range: 1-30 L/h (25 ℃, normal atmospheric pressure
101.325kpa)
Conductivity measurement system
● Conductivity measurement range: 0-300uS/cm (0-500uS/cm)
● Conductivity resolution: 0.1 US/cm
Software computing module
● Equipped with a powerful database data management system: capable
of automatically calculating oxidation stability time based on
results.
● Automatically calculate the maximum second derivative of the
curve to determine the induction time
● Automatically deduce the induction time of the sample at room
temperature of 20 or 25 degrees Celsius
Note: The appearance pictures, dimensions, volume, and weight of the
instrument are for reference only. If there are any updates to the
instrument, there may be slight changes without prior notice.
Packing list
| No. | Name | Quantity | Unit | Note |
| 1 | Oil oxidation stability tester | 1 | Unit | |
| 2 | Computer | 1 | Unit | |
| 3 | Reaction tank | 4 | Piece | |
| 4 | Special plug for reaction tank | 4 | Piece | |
| 5 | Measurement pool | 4 | Piece | |
| 6 | Measurement pool specific plug | 4 | Piece | |
| 7 | Vent pipe | 1 | Set | |
| 8 | Detecting conductivity sensor | 4 | Root | |
| 9 | Gas filtration device | 1 | Set | |
| 10 | Special accessories for connecting ventilation pipes | 1 | Set | |
| 11 | Special calculation software for oil oxidation stability tester | 1 | Set | |
| 12 | Power cord | 1 | Root | |
Shandong Shengtai Instrument Co., Ltd. provides the following
quality assurance for the instruments sold to you:
----The provided instrument materials are brand new, meet quality
standards, and have a manufacturer's certificate of conformity;
----The materials and main components provided meet the technical
requirements specified in the technical documentation;
----The overall quality assurance period of the equipment is one
year (excluding normal wear and tear of vulnerable parts).
----We are responsible for free maintenance of any instrument
quality issues that occur during the warranty period. Due to
equipment malfunction caused by the user's responsibility, we are
responsible for repairing and charging reasonable fees.
----Lifetime discounted supply of parts for equipment, and lifetime
maintenance and repair of the entire machine.
----After the expiration of the warranty period, if the user needs
maintenance and technical services, we will only charge a cost fee.
Packaging and Delivery
1. Packaging of goods: standard wooden or cardboard boxes.
2. Internal packaging: Elastic pearl cotton packaging product,
hardwood board+strong bandage to fix corners.
