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The ST102 Adhesive testing machine for ointment patches is designed in strict accordance with the requirements of the 2020 Chinese Pharmacopoeia "0952 Adhesion Force Determination Method". It adopts modern mechanical design concepts, ergonomic design principles and advanced microcomputer processing technology, featuring novel design, convenient use, excellent performance and beautiful appearance. It is mainly used for testing the adhesive force of ointment patches. Load range: the range of force that the instrument can measure, with the unit of mN. The ST102 Adhesive testing machine for ointment patches has a load range of 0-5000mN. Its main features include: using high-precision force sensors to ensure testing accuracy errors within ±1%; adopting stepper motor control for accurate and stable movement of the measuring head and good repeatability of measurement results; friendly human-machine interface operation with fully automatic testing, testing data statistics and processing functions, and output from a micro printer; automatic memorization and display of test results to reduce human error; and being equipped with computer connection software for automatic communication, storage and printing of test results.

The Kjeldahl nitrogen analyzer is an analytical instrument designed based on the principle of the Kjeldahl nitrogen determination method. Its core function is to measure the content of nitrogen-containing substances such as ammonia nitrogen and protein nitrogen in various samples. The accuracy of its test results is directly related to the quality assessment of food, feed and other products. In practical applications, after the samples are digested at high temperatures in a digestion furnace, they are distilled through a still. The nitrogen content is ultimately calculated, and then the content of substances such as protein is estimated. The ST-04BS Kjeldahl nitrogen determinator is composed of the ST-04B nitrogen determinator distiller and the ST-04C digital display digestion furnace, featuring efficient and precise detection capabilities. Its measurement range is wide and it can be used for the detection of various samples such as grains, foods, dairy products, beverages, feeds, soils, water, drugs, sediments and chemicals. The nitrogen content determination range is 0.02-95% (or 0.1-200 nitrogen), with a relative difference accuracy of up to 1%, which can meet the detection tasks with different precision requirements. The working voltage of this instrument is AC 220V 50HZ, with a total power of 1200W (including 800W for the distiller). It is equipped with a 4-hole digestion furnace and can process 4 samples at a time. It takes about 40 minutes to digest a batch of samples, balancing efficiency and capacity. The overall weight of the instrument is 25 kilograms, and its volume is 380×330×820mm, which is convenient for placement in the laboratory. The harmful gases such as SO₂ that escape during the digestion process can be discharged from the water into the sewer through the sewage pipe on the digestion furnace and the exhaust three-way valve, reducing the impact on the environment.   The test results of the ST-04BS Kjeldahl nitrogen analyzer comply with the indicators stipulated in GB/T6432-2018 "Determination of Crude Protein in Feed - Kjeldahl Nitrogen Determination Method", and are applicable to multiple fields such as food processing, feed production, and environmental monitoring, providing reliable technical support for the quality control and component analysis of related products.

An instrument that determines the concentration, purity, sugar content or content of a sample by measuring the optical rotation of a substance is widely used in the production, research and teaching fields of industries such as sugar, pharmaceuticals, food, chemicals and petroleum, and can be used for laboratory analysis or process quality control. The ST-12B automatic touch screen sugar analyzer adopts a 7-inch TFT true-color touch screen. The control system is highly integrated and operates fully automatically, with convenient operation. Equipped with LED cold light source and high-precision interference filter, it has a service life of over 100,000 hours and a working wavelength of 589.3nm. It adopts the built-in Peltier temperature control technology, with a temperature control range of 15°C to 35°C and a temperature control accuracy of ±0.2°C, effectively enhancing the measurement accuracy and stability. The instrument can measure optical rotation, specific rotation, concentration and sugar content. The measurement range of optical rotation is ±89.99°, with an accuracy of ±0.01° (-45°≤ optical rotation ≤+45°). It supports USB and RS232 data output, can store 1000 data records, and has the function of retrieving historical data by test date, sample number, etc.   Experimental instruments ST-12B Automatic touch screen glucose meter 2. It is equipped with 200mm and 100mm specification test tubes, test tube protective sleeves, rubber gaskets and other accessories

The ST113 magnetic metal detector is a dedicated detection instrument developed in accordance with GB/T 5509-2008 "Determination of Magnetic Metal Substances in Flour of Grains and Oilseeds", which is used to determine the content of magnetic metal substances in flour grains and is applicable to multiple fields such as quality supervision, flour processing, and grain storage and transportation. The core technical specifications of this instrument include: the maximum sample capacity is 1kg, the sample recovery rate is no less than 95%, the blade and motor speed are both 50r/min, the motor power is 50W, the working voltage is AC220V, the overall weight of the machine is 12kg, and the external dimensions are 255×275×385mm. The magnetic induction intensity of the accompanying magnetic separation plate is no less than 120mT, the size of the strong magnetic area is 130mm×130mm, and the size of the separation plate is 210×210×6mm.   Shandong Shengtai Instrument Co., Ltd. offers the following quality guarantees for this instrument: The instrument and materials are brand new and in compliance with national standards, and come with the manufacturer's certificate of conformity. The main components comply with the technical requirements. The overall quality guarantee period for the machine is one year (excluding normal wear and tear of vulnerable parts). During the warranty period, any quality issues will be repaired free of charge. If the fault is caused by the user's responsibility, a reasonable charge will be made. We offer lifetime preferential supply of spare parts and provide complete machine maintenance. After the warranty period, only the cost will be charged for repair and technical services. The product packing includes one main unit, one magnetic separation plate, one power cord, one fuse tube, one user manual, one certificate of conformity and one warranty card.

Hardness is an important indicator for measuring the physical properties of grains and feeds, and it is directly related to the processing adaptability of grains, the palatability of feeds and their storage stability. During the production, transportation and use of grains and feed, their hardness can affect processing efficiency (such as grain dehulling and feed pelletizing) and the feeding effect of animals. Therefore, precise determination of hardness is of great significance. The determination of the hardness of grains and feed usually adopts the automatic hardness tester method. The hardness is characterized by detecting the maximum force required to break the grains or feed. The more stable the test value and the smaller the error, the higher the reference value of the test result. The ability of grains and feed to resist external forces without being crushed is called their hardness. In practical applications, hardness indicators are mainly used in two scenarios: one is the grain processing scenario, for instance, the hardness of wheat affects the flour yield and quality, and the hardness of corn is related to the efficiency of starch extraction; Secondly, in the feed production scenario, if the feed pellets are too hard, it will cause difficulties for animals to chew and reduce the digestion and absorption rate. If they are too hard, they are prone to breaking during transportation and generating dust. If they are too soft, they are likely to clump and deteriorate. For instance, when feed mills produce pellet feed for livestock and poultry, they need to keep the hardness within a reasonable range (usually 3-8kg) to balance animal feeding and product stability. The grain purchasing department also assesses the maturity and storage potential of grains by measuring their hardness.   The ST120B automatic hardness tester is a professional device specially designed for hardness testing of grains and feed. It adopts high-precision pressure sensors and a single-chip microcomputer control system, capable of automatically completing force value detection and data processing. This equipment is suitable for feed companies, agricultural colleges and universities, agricultural product quality inspection departments and grain and oil enterprises, and can be used to measure the hardness of samples such as corn, wheat and pellet feed. Its working principle is as follows: Pressure is applied uniformly through the motor feed mechanism. When the grain or feed reaches the maximum load-bearing capacity and breaks, the equipment automatically records the force value at this time, which is the hardness value of the sample. Meanwhile, the equipment can automatically calculate the maximum value, minimum value, average value and standard deviation of multiple groups of samples, and output the results through a thermal micro printer, providing reliable data basis for the quality control of grains and feed.

A plant shredder is a device used to crush plant samples to meet the requirements of subsequent testing, analysis, etc. The ST112A micro plant grinder, as a dedicated device, can efficiently crush plant samples such as rice, wheat, corn, and beans. Its core working principle is to achieve the crushing operation of the samples through the rapid rotation of the rotor blade and the rapid cutting formed by the fixed blade. Moreover, during the continuous crushing process, it can minimize the evaporation of moisture in the samples to the greatest extent. Ensure the stability of the characteristics of the sample after crushing.   The core advantages and features of the ST112A micro plant pulverizer are mainly reflected in three aspects: Firstly, it has excellent pulverization effect and uniform pulverization fineness, which can ensure that the particle size of the crushed samples is consistent, meeting the requirements for sample uniformity in subsequent experiments. Second, it is highly practical in operation. The equipment is small in size and light in weight (the whole machine weighs only 12.5 kilograms), with a compact structure and an attractive appearance, making it convenient to place and move in scenarios such as laboratories. Thirdly, it has a high crushing efficiency. Combined with a 180W power motor and a rotational speed of 1400r/min, it can quickly complete the crushing of samples and reduce waiting time.   The key technical specifications of this crusher are clear, and the specific parameters are as follows: The maximum sample size is ≤50g, which can meet the single crushing requirements of conventional plant samples. It is equipped with 3 screens of different specifications, corresponding to three grinding mesh sizes of 0.5mm, 1.0mm and 1.5mm. The appropriate fineness can be selected according to the experimental requirements. The motor has a rotational speed of 1400r/min, a power of 180W, and a working voltage of AC220V, which can stably provide crushing power. The external dimensions are 300×185×300mm. (Note: The appearance, dimensions and weight of the instrument are for reference only. If there are any updates, there may be minor changes without further notice.)   From the perspective of product configuration, the packing list of the ST112A micro plant chipper includes six key components: one main unit, which serves as the core working unit of the equipment; Three screens of different specifications are used to control the fineness of grinding. One power cord provides power connection for the device; One 10A fuse tube (placed inside the fuse holder) to ensure the electrical safety of the equipment. One user manual to guide users in operating the equipment correctly; One certificate of conformity and warranty card, serving as proof of product qualification and after-sales guarantee.   In terms of after-sales support, Shandong Shengtai Instrument Co., Ltd. offers comprehensive quality and service support: Firstly, there is a guarantee for equipment and materials. The instruments provided are brand-new products that comply with national quality standards and have the manufacturer's certificate of conformity. The core components meet the requirements stipulated in the technical data. The second is the warranty period service. The quality guarantee period for the entire machine is one year (excluding normal wear and tear of vulnerable parts). If any quality problems occur during the warranty period, free repair can be enjoyed. If the fault is caused by the user's responsibility, only reasonable fees will be charged for the repair. Third, long-term service support is provided. The equipment can enjoy preferential supply of spare parts for life and lifetime maintenance and repair services for the entire machine. After the warranty period expires, if the user needs repair or technical services, only the cost will be charged.

Grain bulk density refers to the weight of grains per unit volume. It is a core indicator for evaluating the quality, fullness and grade of grains, directly affecting the purchase pricing, storage stability and processing value of grains. Generally, the higher the bulk density, the plumper the grain particles and the better the quality. The determination of bulk density of grains is a key link in the fields of grain purchasing, storage, processing and quality inspection. By precisely measuring bulk density, the maturity and impurity content of grains can be quickly judged, providing a scientific basis for grain quality control and trade settlement.   The ST128 (HGT-1000) electronic grain bulk density tester is a new type of grain quality inspection instrument developed in tandem with the research and formulation of the new national standard for corn, and it complies with the GB/T 5498-2013 "Determination of Bulk Density in Grain and Oilseed Inspection" standard. It can not only measure the bulk density of large-grain grains such as corn, but also that of small-grain crops like millet, wheat and sorghum, and is suitable for the bulk density determination of multiple varieties of grains. This instrument is an intelligent weighing device equipped with a microprocessor. It features reliable performance, convenient operation and high precision. The results are displayed on a red LED digital tube. Data can be printed through a randomly configured printer or connected to a computer via an interface. Its main technical indicators are as follows:   - Maximum working weight: 1000g±2g Minimum working weight: 100g Resolution: 1g - Capacity cylinder volume: 1000mL±1.5mL - Power supply: 220V 50Hz - Power: 10W - Operating environment temperature: 5℃-40℃ - Relative humidity: < 90%RH - Measurement method: Combined or single use Instrument dimensions: 485×330×150mm, weight: 11kg Packaging size: 511×237×400mm     Shandong Shengtai Instrument Co., Ltd. provides the following quality guarantees for this instrument:   The provided instrument materials are brand new, in compliance with national quality standards and accompanied by the manufacturer's certificate of conformity. The materials and main components comply with the technical requirements stipulated in the technical data. The overall quality guarantee period for the equipment is one year (excluding normal wear and tear of vulnerable parts). If any quality problem occurs during the warranty period, free repair will be provided. If the malfunction is caused by the user's responsibility, reasonable charges will be imposed for repair. Lifetime preferential supply of spare parts and lifetime maintenance and repair of the entire machine. After the expiration of the warranty period, only the cost will be charged for providing maintenance and technical services.   Experimental instruments   1. The ST128 (HGT-1000) electronic grain bulk density device developed and produced by Shandong Shengtai Instrument Co., LTD 2. The instrument is randomly equipped with a printer and a 1000mL capacity cylinder

A specialized laboratory equipment used in the wheat experimental flour milling process to grind wheat samples and prepare flour of quality close to that of large-scale machines. Abbreviated as experimental grinding mill. This flour mill, based on the grinding principle, achieves efficient flour production through three consecutive grinding processes with four rollers. According to the sieving method, it relies on a double crank mechanism to drive the circular screen to rotate at variable speeds to ensure the sieving effect. It is one of the core equipment for conducting wheat flour quality analysis in the laboratory and can be used to prepare flour for dough rheological property analysis or baking experiments, thereby evaluating the quality of wheat flour.   The ST-1700 experimental grinding mill is equipped with an eccentric sleeve rolling distance adjustment mechanism, which can flexibly adjust the gap between each pair of grinding rollers to ensure stable grinding effect throughout the entire cycle of the grinding rollers. It adopts a transparent cover plate design, making the grinding and sieving processes clearly visible and facilitating experimental observation. Designed and manufactured in accordance with the requirements of the industry standard NY/T 1094.5-2006 "Experimental Flour Milling of Wheat - Part 5", it features an efficient four-roller continuous three-stage grinding structure, which can effectively reduce water loss during the grinding process and increase the sample recovery rate. Moreover, the all-alloy grinding rollers have undergone quenching treatment, featuring high hardness, strong wear resistance and a long service life.   Experimental instruments   1. The ST-1700 experimental grinding mill developed and produced by Shandong Shengtai Instrument Co., LTD 2. Special all-alloy quenched grinding rollers for experimental grinding mills and double-crank-driven cylindrical screens

The lowest temperature required for petroleum products to dissolve with an equal volume of aniline to form a single liquid phase is called the aniline point. It is an important indicator for measuring the hydrocarbon composition in petroleum products. The determination of aniline points for both light-colored and dark-colored petroleum products must follow specific standard procedures.   The determination of aniline point is mainly used to judge the component characteristics of petroleum products. For instance, the content ratio of alkanes, alkenes and aromatic hydrocarbons in oil products can be roughly distinguished based on the level of aniline point. It also provides key data support for the production and processing, quality control and application selection of petroleum products.   The SD262A petroleum product aniline point tester adopts a digital PID temperature regulation controller, featuring high temperature control accuracy and stable performance. It is equipped with an internal stainless steel electric heating tube for heating and is easy to operate. This instrument is designed and manufactured in accordance with the national standard GB/T262-2010 "Determination of Aniline Point and Mixed Aniline Point of Petroleum Products and Hydrocarbon Solvents", and can automatically complete the determination of aniline point of light-colored and dark-colored petroleum products. The temperature control range covers room temperature to 200℃, and the temperature control accuracy is ≤0.5℃.   Experimental instruments   1. The SD262A aniline point tester for petroleum products developed and produced by Shandong Shengtai Instrument Co., LTD 2. Supporting detection components (including 1 thermometer each for 25~105℃ and 90~170℃ with a 0.2℃ division, U-shaped tube, metal cover, glass test tube, stirring rod and other dedicated test parts)

The color of petroleum products is an important indicator for measuring their appearance quality. Different color numbers correspond to the purity, oxidation degree and other characteristics of the product. For example, a too high color number of lubricating oil may indicate oxidation deterioration or excessive impurity content. The chromaticity determination of petroleum products needs to be carried out by comparing with standard color plates through dedicated instruments to accurately determine the color number, providing a basis for product quality control.   The SD6540 petroleum product colorimeter adopts an observation eyepiece composed of concave and convex lenses, which can simultaneously present two semi-circular colors. It is equipped with an optical eyepiece with light adjustment and focusing capabilities, making operation convenient. The instrument is designed in accordance with SH/T0168-92 "Determination of Color of Petroleum Products" and GB/T6540 standards. It can determine the color of lubricating oil and other petroleum products and chemical products. The color codes correspond to ASTM D1500, GB/T6540 and ISO color codes. The light source is a 220V, 100W bulb with an inner frosted milk shell and a temperature of 2750±50K. It is equipped with a colorimetric tube with an inner diameter of Φ32mm and a height of 120 to 130mm, as well as a standard color disk with 26 light holes (25 for standard glass plates of 1-25 color numbers and 1 blank). Experimental instruments 1. The SD6540 type petroleum product colorimeter developed and produced by Shandong Shengtai Instrument Co., LTD 2. Accessories (including colorimetric tubes, milky white inner frosted bulbs, fuse tubes, etc. Please refer to the packing list for details)   In terms of quality assurance, this instrument provides brand-new materials that comply with national quality standards and come with the manufacturer's certificate of conformity. The main components meet the technical requirements. The overall quality guarantee period for the machine is one year (excluding normal wear and tear of vulnerable parts). During the warranty period, any quality issues will be repaired free of charge. If the fault is caused by the user's responsibility, a reasonable charge will be made. At the same time, we offer lifetime preferential supply of spare parts and lifetime maintenance and repair services for the entire machine. After the warranty period expires, only the cost will be charged for repair and technical services.

The smoke point of oils and fats refers to the temperature at which vegetable oils and fats start to produce a small amount of continuous blue-tinged smoke (i.e., thermal decomposition products of oils and fats) when heated to a certain temperature. It is one of the important indicators for measuring the quality and thermal stability of vegetable oils and fats. The smoke point of oils and fats is closely related to their processing technology, purity, fatty acid composition, etc. Oils and fats with too low a smoke point are prone to produce harmful substances during cooking or processing, which can affect food quality and consumption safety. Therefore, accurately determining the smoke point of oils and fats is of vital importance in quality supervision, food processing and other fields.   The determination of the smoke point of vegetable oils is usually carried out by visual inspection. When the sample is heated until a specific smoke appears, the temperature at this time is taken as the smoke point. The requirements for the smoke point of oils and fats vary in different scenarios. For instance, in food processing, oils and fats with a smoke point that matches the cooking temperature should be selected to prevent deterioration at high temperatures. In import and export inspection, it is necessary to determine whether the oil meets the relevant standards based on the smoke point. The ST123 oil smoke point meter is a dedicated instrument developed in accordance with Article 5 "Second Method - Visual Determination" of the national standard GB/T20795-2006 "Determination of Smoke Point of Vegetable Oils". It is suitable for departments such as quality supervision, import and export inspection, oil processing, oil storage and transportation, food processing, scientific research, agricultural breeding, and schools that need to determine the smoke point of vegetable oils. This instrument heats the sample. When a small amount of continuous blue smoke is observed, the temperature indicated by the thermometer is read and the heating/lock button is pressed. The value displayed on the upper part of the instrument head is the smoke point. It has the characteristics of simple and intuitive structure and low price. Its technical parameters meet the professional measurement requirements, including a double test error of ≤2℃, a temperature measurement range covering room temperature to 300℃, and the results can be output through both a visual thermometer and a small LCD digital display. Moreover, the entire machine has been upgraded and improved, featuring a powder-coated casing to enhance safety performance. It supports built-in curve calibration of the temperature control device and can be verified by the metrology institute. It can accurately and stably complete the determination of smoke point of oils and fats.

The ability index of petroleum and synthetic liquids to separate under specified conditions after being mixed with water is a key parameter for measuring their anti-emulsification performance. The shorter the demulsification time, the better the performance is usually indicated. In fields such as petroleum and power, if oil products have poor anti-emulsification performance, they are prone to form oil-water emulsions, which may affect the lubrication effect of equipment and cause component corrosion. Therefore, precise measurement is required. The SD7305 petroleum demulsification tester adopts a small cylinder desktop structure, which is compact in size and easy to operate. The motor inside the bath automatically stirring to ensure uniform temperature. It supports placing two samples simultaneously for sequential testing. The stirring shaft has good concentricity, without any shaking or tube collision. This instrument is designed and manufactured in accordance with the standards of GB/T7305 and GB/T7605-2008, equivalent to the ASTMD1401 standard. It can accurately determine the ability of petroleum and synthetic liquids to separate from water and is widely used in the fields of petroleum, power, chemical engineering, as well as in colleges and universities and research institutes.   Experimental instruments   1. The SD7305 type petroleum demulsification tester developed and produced by Shandong Shengtai Instrument Co., LTD 2. Matching test tubes (the instrument packing list includes 2 pieces)