Introduction AUTO GBM-L2 Dual-Pressure Methods Vacuum Decay Leak Detection Tester adopts the test principle of vacuum decay method/pressure decay to detect micro-leakage of finished packaging. It can be applied to packaging systems composed of vials, ampoules, Leakage detection of pre-filled needles, eye drop bottles, HDPE bottles, infusion bottles/bags and other pharmaceutical packaging, food packaging, and chemical industry packaging.   Test principle The host is connected to a sealed test chamber customized according to the sample. When performing the vacuum decay method test, the instrument evacuates the test chamber, and a pressure difference is formed inside and outside the sample. Under the action of the pressure, the gas/liquid in the sample enters the test chamber through the leak hole. The main engine uses the absolute pressure sensor and the differential pressure sensor to monitor the pressure change in the chamber to judge whether the sample leaks. When performing the pressure decay method test, the instrument fills the test chamber with a predetermined air pressure, and the gas in the test chamber enters the sample through the leak hole. The host uses absolute pressure sensors and differential pressure sensors to monitor the pressure changes in the chamber to determine whether the sample is leaking.   Standard ASTM F2338-2009(2013),  YY-T 0681.18-2020,  USP<1207.2>, ASTM F2095   Specification Item Technical Parameters Absolute pressure test range (0~300) kPa Differential pressure test range (-2~2) kPa Detection sensitivity 1～3 μm Balance/Test Time 1～3600 s Vacuum time 1～3600 s Set flow rate 0～3 mL/min Test system Dual Sensor Technology / Dual Cycle Test Test chamber  Customized according to samples Suitable for Vials, ampoules, prefilled needles, infusion bottles/bags, etc. Detection principle Vacuum Decay Method/ Pressure Decay Method Host size 495 mm*455 mm*280 mm Ambient temperature 20℃~30℃ Relative humidity Max 80%，no condensation Working power AC 220V, 50HZ   Features u Dual-Pressure Methods, to help solve testing difficulties The double combination of vacuum decay method and pressure decay method solves the problem of easy misjudgment and false negative for freeze-dried powder injections containing vacuum in the bottle using a single vacuum decay method. Based on dual-sensor and dual-circulation system technology, high-quality absolute pressure sensor and differential pressure sensor, with an accuracy of 0.1% FS, can effectively detect large and small leaks, accurately calculate the leak hole diameter, and give a pass or fail judgment.   The instrument has low sensitivity and good test repeatability For rigid samples, the detection sensitivity is as low as 1 μm, and the test repeatability is as low as 0.8%. The instrument has stable performance, low noise and good repeatability. u Imported brand accessories, excellent performance Imported brand vacuum pump, pumping rate up to 3 L/s, noise as low as 50 DB, high ultimate vacuum, convenient oil level detection and replacement. The imported gas mass flow controller can simulate micro-leaks arbitrarily, with a resolution of 0.001 mL/min, which provides a reliable guarantee for the method verification of instrument sensitivity. u Large size touch screen, intelligent operation Color 7-inch touch screen, clear view, sensitive touch, easy to operate. Equipped with a micro-printer, USB data interface, and supports PC software measurement and control operation. The test software is designed according to the GMP appendix "Computerized System". It has an audit trail function and multi-level authority settings for users, which can meet the needs of the pharmaceutical industry for data traceability. u Personalized customization to meet the needs of different samples For different test samples, it supports customization of suitable test chambers to meet the needs of different tests. For the same type of samples, it supports customized nesting mode, which can realize the sharing of a test chamber for samples of various specifications.   Application       Freeze-dried powder injection Injection Prefill needle       Eye drops Plastic Ampoule BFS Infusion bags   Factory configuration Standard Host machine, vacuum pump, test chamber and 3 sets of yin and yang control (customized as required), 11-inch touch panel, professional software (GMP) Optional Imported gas flow meters, air compressors, printers, calibration certificates  

1. Product introduction The GQ-D1 falling ball impact tester is mainly suitable for testing the impact strength of steel balls for food packaging rigid tablets, solid pharmaceutical rigid tablets and plastic bottle cap products. During the test, put the test product on the test bench of the falling ball impact tester, make the steel ball of the specified weight fall freely on the product from the specified height, impact the product, and then check whether the appearance of the product is damaged and all aspects of performance.   2.Product features u The host is equipped with a color touch screen, which is convenient for users to perform test operations. u The novel mechanical model and the humanized design of the operation interface make the operation of the instrument simple and convenient; u Traditional electromagnets will generate high temperature when they generate magnetism, and there will be residual magnetism after power failure, which will affect the accuracy of the experiment. This instrument adopts the principle of energization and repulsion, which can automatically release, avoiding residual magnetism and high temperature, and ensuring the accuracy of the experiment. u The test process is intelligent, which greatly improves work efficiency; u The sample is pneumatically clamped and released, which reduces the error and test time; u Built-in printer, which can print test reports. u The instrument can query the data and the results of each experiment. u The test results are accurate.     3.Standard GB/T 15267-1994、GB/T 17876-2010、YBB0021-2005、YBB00202005   4.Technical Parameter Item Technical Parameter Impact height 0~900mm Steel ball diameter 23mm、28.6mm、38.1mm、50.8（Food bag）/25mm、28.6mm（Medicine packet） Specimen holder range 120*85mm Specimen size ≧100*150 Overall dimension 325*550*1250 Power 75W Power supply AC220V 50Hz

The GBL-L2 popular single-column electronic tensile tester is suitable for tensile, peeling, heat-sealing, tearing and other mechanical performance tests of various metal and non-metal materials. It meets the requirements of the national technical supervision department for test technology. It is widely used in plastic film, food, and pharmaceutical manufacturers to test products quality control and testing institutions, scientific research and teaching experiments in university.

Torque tester HP-200 is a testing instrument for bottle cap locking and opening based on ASTM and GB standard requirements and market demand developed and manufactured by GBPI R&D team. For bottle packaging products, nozzle packaging products and tube packaging products, the size of the cap opening torque is one of the key control parameters, which has a great impact on the intermediate transportation and final consumption of the product.It is suitable for measuring the size of the locking and opening torque of bottle products, and is an indispensable test equipment in the production process.

Product Description The LC-2 Sample Cutter is used for cutting samples of various plastic films, paper and other materials prior to stretching, peeling and heat sealing tests. It is easy and efficient to operate and can accurately cut samples of standard required sizes. Features Meets the sample making requirements for Type 2 specimens of standard GB/T 1040.3. Using imported tungsten steel finely ground special blades, sharp and durable, with hardness up to 92 HRA. Accurate sample size, no damage, smooth and burr-free edges. Spring tensioned for easy sample fixing and smooth sample cutting. The ability to cut up to 12 samples in a single pass allows for efficient production of large batches of samples. Safety protection, the outer layer of the blade is covered with an aricotta stopper so that the blade does not come into direct contact with it. Different sample widths can be ordered to suit the requirements of each customer.   Specifications Item Specifications  Cut size 15 mm×210 mm（Optional width） Number of samples 12 pcs（Single Layer） Sample thickness ≤ 200 μm Product size 250 mm×350 mm×248 mm Weight 11 kg  

GBB-F1 Heat Seal Tester is to test the temperature, pressure, and time for heat sealing of various film materials. It is applied to quality inspection organizations, drug control institutions, research institutes, packaging, thin film, food companies, pharmaceutical enterprises, personal care industry and so on.

Product introduction GHH universal material testing machine is theGuangzhou international r&d team based on GB, JIS, ASTM, DIN and other standards and market demand to upgrade the mechanical properties of new testing machine, suitable for all kinds of metal, non-metallic materials tensile, stripping, heat sealing, tearing, piercing, compression, bending and shear test, and then calculate the material parameters such as fracture strength, elastic modulus, It can also be used in the medical industry of syringe piston sliding, body tightness test verification. GHH universal material testing machine has a flexible interface and control mode, can do stretching, peeling, and other tests, speed, thickness, clamping distance multi-parameter variable setting; The measuring accuracy can reach 0.5 level; The whole process is controlled by computer, open data structure; The core adopts imported parts, loaded with high-precision ball screw; Control measurement unit, can choose the built-in or external type, with perfect limit protection, overload protection, emergency stop and other safety protection functions. GHH universal material testing machine is suitable for plastic sheet, pipe, profile, plastic film and rubber, wire and cable, steel, glass fiber and other materials of all kinds of physical and mechanical properties test for material development, is the physical property test, teaching research, quality control and other indispensable testing equipment.   Test principle Will be clamped specimen in tensile machine fixture between two chuck, two clip do relative movement, through strength sensor and the machine is located in the moving clamp head built-in displacement sensor, collected test force value change and displacement in theprocess of change, to calculate the sample drawing (tensile strength, elongation at break and the elastic modulus of performance indicators, etc.   Standard JJG 139, ASTM D828,ASTM E4, ASTM D882,ASTM D1938,ASTM D3330,ASTM F904,JIS P8113   Specification Item Technical parameters Test range 0～3000 N（Multiple groups of sensors can be selected within 20000 N） Test measurement Within±0.5 %FS Test speed 0~500 mm/min（continuously variable speed） Speed precision Indicates within±1% of the value Displacement measurement accuracy Indicates within±0.5% of the value Effective test stroke 1000 mm Effective test stroke 1100% Effective test width 30 mm Force value resolution 0.001g Resolution of displacement 0.001 mm Size L×W×H：750 mm×500 mm×1800 mm Weight 150 kg Power 1000 W The power supply AC 220 V，50Hz   Application     Plastic film It is suitable for tensile,  peeling,  heat sealing,  tearing,  puncturing,  compression,  bending and other performance tests of plastic films,  composite materials,  flexible packaging materials,  tapes and other products. Composite film bag It is suitable for tensile,  peeling,  heat sealing,  tearing,  puncture,  compression,  bending and other performance tests of composite films,  co-extruded films,  composite bags,  retort bags,  aluminum-plastic composite bags and other products. Paper It is suitable for tensile strength,  peeling,  deformation,  tearing,  heat sealing,  bonding and other performance tests of paper,  kraft paper,  facial tissue,  toilet paper and other products. Medical Patches It is suitable for tensile strength,  peeling,  deformation,  tearing,  heat sealing,  bonding and other performance tests of medical cold compress,  plaster and other products. Pressure Sensitive Tapes It is suitable for tensile strength,  peeling,  deformation,  tearing,  heat sealing,  bonding and other performance tests of cellophane tape,  electrical insulating tape,  medical zinc oxide adhesive tape and other products.   Features Flexibility and variety of control Supports stretching, peeling, heat sealing, tearing, puncture, compression, bending, shear and other tests, speed, thickness, clamping distance variable parameters set, optional pneumatic fixture, suitable for a variety of fixtures.   High measurement accuracy The test measurement accuracy can reach 0.5 level, high sampling rate (100 times/second), wide speed range, can adapt to high and low speed test, make the test data more accurate.   Imported core components, safe and reliable operation  Using high-precision ball screw loading, the loading is stable, the testing machine has a long life, good long-term stability and energy saving;  A plurality of load/deformation measurement subchannels are proposed, which support multiple sensor expansion measurement. A fully digital control system with imported AC servo system and motor can control the displacement zero flutters.   It has improved safety protection functions such as limit protection, overload protection, emergency stop, etc.  Double column table structure, good rigidity, control measurement unit can choose built-in type (simple appearance, save space) and external type (easy to upgrade, maintenance and separate from the microcomputer operation).   Intelligent operating system  According to the computer system design of the new version of GMP appendix, the test process parameters are flexibly set, and the function of audit tracing (test tracing, log tracing) is provided, which meets the requirements of data traceability and ensures the security and integrity of the test data. You can set different levels of system operation rights.  Intelligent Statistical analysis, support multiple data standard deviation analysis. At the same time, the system can be expanded, such as access to laboratory LIMS system.  Personalized test reports are set on demand to support multiple formats of data output.  Independent test can be separated from the computer, data can be processed automatically, and a built-in micro-printer can print data in real time. The instrument is equipped with computer interface, can also be connected to the computer online detection.   Laboratory intelligentIoT platform It can be connected to the Internet of Things platform to realize digital network management:  Remote login to theIoT platform can be performed by directly accessing the software interface of the instrument.  All experimental data can be viewed anywhere by simply logging in to the platform;  Unified management of experimental data of all instruments in the interface of things platform can be achieved.  A complete laboratory management process can be realized;  One-click application for after-sales service, and one-click application for relevant accessories; After-sales staff can provide remote after-sales service through the system. There is a complete after-sales record on the platform, which is convenient for after-sales staff to provide high-quality online service;  Customers may download the required instrument materials, documents and operation videos on the platform by themselves.    

Product Introduction GBB-C vertical heat seal tester can accurately measure the heat sealing temperature, heat sealing time, heat sealing pressure, and other heat sealing performance parameters of plastic packaging vertical bags, paper-plastic composite vertical bags and metal composite vertical bags(boxes). The heat sealing performance of samples of different materials are different. And the best heat sealing conditions can be accurately obtained through the determination of their heat sealing performance parameters.   Testing Principle Put the sample on the lower tray of the instrument, adjust the appropriate height according to the size of the sample, set a certain sealing temperature, time and pressure as required, and start the instrument with one key. The fixture on the instrument will heat seal the sample according to the setting parameters. Under the manual state, step on the foot switch, and the heat sealing knife is pressed. The heat sealing time is determined by the value set by the time control. In the automatic state, the upper and lower heat sealing knives of the heat sealer will automatically heat seal repeatedly according to the set time. Standards ASTM F 2029 Specifications Item Technical parameters Temperature range Room temperature～250℃ Temperature precision ±1℃ Seal time range 0.1s～99.99 h Pressure range (0~1) MPa Heat seal area Upper and lower sealing knife 300×5.5 mm, slide lower bar has silicone pad as buffer Heat seal method Two ways: automatic or manual, external air cylinder Air supply Compressed air Instrument size 730(L) mm×400(B) mm×535(H) mm Weight 45 kg Power 1200 W Power supply AC 220V，50Hz   Characteristics u High progress imported quality sensor, quality assurance Original imported temperature sensor, wide temperature control range, high sensitivity, temperature control accuracy of ± 1 ℃, it has ultra-high stability and ultra-low failure rate. u Independent control of heat sealing temperature The rear of the heat sealing knife is equipped with a temperature sensor, and the temperature control of the inner and outer sealing knives is independent and set separately. u Personalized test selection Manual testing and automatic testing are free to choose. The automatic mode is time-saving and convenient, and the repeatability is fully automatic for heat-sealing the sample; the manual mode is equipped with a suitable foot switch, step on the foot switch, the heat sealing knife is pressed, and the safety protection is easy to operate. u New air drive system The drive system consists of a pressure gauge, a pressure regulating valve, and a cylinder. After the compressed air is introduced, the pressure is adjusted through the pressure valve, the air pressure can be accurately locked, and the heat sealing clamp is pneumatically driven, which is convenient and efficient. u Wider range of customized services The anti-sticking function of the heat sealing knife can be upgraded as needed, experience upgrade, and it is more intuitive and convenient to determine the best heat sealing conditions. The shape, size and smoothness of the sealing knife heat cover can be customized to meet different scientific research needs.   Application     Plastic stand up pouch Paper plastic stand up pouch     Aluminized stand up pouch Milk Boxes

Product Introduction The headspace gas analyzer adopts the destructive puncture detection method and is equipped with high-precision oxygen sensors and carbon dioxide sensors to accurately detect the O2 and CO2 content of hollow packaging containers such as packaging bags, bottles, cans, etc. The analysis of the content of the headspace gas in the packaging can make a reasonable judgment on the product quality, the validity of the shelf life prediction, and the rationality of the packaging design. At the same time, it can also be used as a means of packaging tightness testing. It is a better choice for modified atmosphere preservation (MAP, CAP) packaging, large infusion bottles (bags), residual oxygen in the headspace of prefilled needles, residual oxygen detection in vials, and the results of residual oxygen detection for various food and medicines. Nowadays, the headspace gas analyzer has become an important method to check the quality of packaging design and one of the important methods to verify the product shelf life. Our headspace gas analyzer GB-DK can quickly detect O2 in production lines, warehouses, laboratories and other occasions. And CO2 content to guide production.   Test principle The gas in the sample is drawn into the sensor by a vacuum pump. The sensor outputs the current and voltage signals of the O2 and CO2 (optional) concentration in the gas in the sample in real time. The instrument calculates the content of O2 and CO2 in the gas by obtaining the current and voltage signals output by the sensor. After reaching the end conditions of the experiment, the test stops, and the instrument records the concentration of O2 and CO2 in the measured gas in the sample.   Technical parameter Item Parameter Gas to be Measured O2 (standard configuration) CO2 (optional) Measurement Principle Fluorescence optics infrared absorption Measurement Range 0%～25% 0%~100% Measurement Accuracy ±0.2% ±2% Sample Size ≥5 ml (standard atmospheric pressure) ≥20 ml (standard atmospheric pressure) Dimensions 350 mm (L)×330 mm(W)×200 mm(H) Power Supply 220 VAC±10 % 50Hz/120 VAC±10 % 60 Hz Net Weight 5kg    Features 1.Using high-precision sensors, high accuracy, good stability, long-term operation, long service life. Over-range automatic protection function to avoid damage to important sensors when the instrument fails. 2.The needle/probe safety holster is used to ensure safe testing and fast sampling. 3.Oxygen and carbon dioxide can be detected at the same time, and carbon dioxide gas can be selected for analysis according to different user needs. The sampling volume is at least 3 ml. 4.Built-in operating system, the system is equipped with an ARM control system to control the host through a touch screen (testing equipment and control software are combined into one); at the same time, the system can be expanded, such as connecting to the laboratory LIMS system. 5.The software is designed according to the requirements of the computerized system in the new version of the GMP appendix, and users are divided into multiple levels such as operators and administrators (such as administrators, operators, observers, etc. but not limited to these levels). 6.It has the audit trail function, which can realize the audit trail of the system, project operation, and method to ensure the safety and integrity of the test data. 7.Personalize the test report, set the report module that needs to be displayed, and output the report in PDF mode. The micro printer can print test reports in real time.

  Application used to detect the gloss of plastic film, paper, ink, adhesive, etc. Multi-point measurement and data processing can be performed on the sample, and parameters such as average value, standard deviation and coefficient of variation can be printed directly. The machine has high precision and good stability, and can measure the glossiness of flat products such as paint, paper, plastic, ceramic, stone and metal.   Feature  Full-function intelligent design, light touch key operation.  Automatic measurement and manual measurement function.  For single point or no more than 10 points measurement, calculate the average value, root mean square, coefficient of variation and print out the result.   Standards  Angle International Standard Chines Standard Application 20 ISO-2813 ISO8254 GB9754 GB8807 Coating Plastic 20 TAPPI-T653 ASTM-D1834 GB8941.1 Paper 45 ISO-2767 GB8941.2 Metal compound paper 45 ASTM-C346 ASTM-D2457 GB8807 Ceramics、Plastic 45 JIS-E8741   Coating 60 ISO-2813 ASTM-D2457 GB9754 GB9966 GB8807 Coating Stone Plastic 75 TAPPI-T480 GB9841.3 Paper 85 ISO-2813 GB9754 Coating   Specifications Item Specification Test range 0-199.9 Gloss units Precision ±1.0 Gloss units Stability Not more than 0.5 gloss unit / every 30 minutes Repeatability Not more than 0.5 gloss unit Measuring probe size 180mm×100mm×50mm Power 25w/ 220vAC，50HZ      

  Introduction GBPI haze meter can easily achieve ASTM D1003 non-compensation method, ISO 13468 compensation method, full light transmittance,haze test.Open sample bin can be vertically and horizontally tested to accommodate more samples to be tested.The YH1200 haze meter uses a PD array detector to meet the CIE V(λ)2 degree visual response. The compensation method can be used to measure the light transmittance and haze with high precision and repeatability.   Technical Advantage 1.Double standard ISO&ASTM Able to meet the test standard requirements of different users, in accordance with ASTM D1003/1044,ISO 13468,ISO 14782,GB/T 2410,JJF 1303-2011,CIE 15.2,JIS K7105,JIS K7361,JIS K 7136   2.Easy to operate, faster and more accurate measurement The YH1200 haze meter is equipped with a large-size touch screen for easy operation.With a PD array detector, CIE V(λ)2 degree visual response enables high precision and repeatable transmittance and fog measurements.USB data output device for docking with laboratory system.   3.Dynamic measurement Independent light source detector and temperature sensor, constantly monitor light source and environmental change, ensure the reliability of test data.   4.With compensation port, so that the measurement data more accurate Meet ASTM D1003 non-compensation method, ISO 13468 compensation method, full light transmittance, fog test, provide more accurate test results.   5.Easy to measure and widely applicable to samples Open measuring area, vertical and horizontal testing, suitable for more samples to be tested.   6.Quality control software It provides powerful software for measuring and analyzing fog and light transmittance, which is suitable for quality monitoring and tabulated management of fog and light transmittance data in various industries.The management of users will be digitized at the PC end, the difference of fog and light transmittance will be compared, and the test report form will be generated to facilitate customer customization and management.   Application YH1200 haze meter is widely used in glass processing, plastic processing, film processing, screen processing, packaging industry, liquid pharmaceutical analysis and other aspects.   Specification Product Model GBPI Haze Meter Optical Geometry Transmittance：0/D (Parallel light illumination, diffuse viewing); Conform to the standards: ASTM D1003/1044,ISO 13468,ISO 14782,GB/T 2410,JJF 1303-2011,CIE 15.2,JIS K7105，JIS K7361,JIS K 7136 Characteristic The instrument can easily achieve ASTM D1003 non-compensation method, full light transmittance,haze test. Open measuring area for vertical and horizontal testing. In glass processing, plastic processing, film, screen processing, packaging and other industries are widely used in transmittance,haze detection. Integrating Sphere Size Φ154mm Light Source 400nm to 700nm, combined LED light Spectrophotometric Mode / Sensor The PD array detector satisfies CIE V(λ)2 degree visual response Wavelength Range / Wavelength Interval / Semiband Width / Measurement range 0~100% Measuring Aperture Φ20mm/Φ15mm/Φ8mm/Φ4mm(Select a single aperture) Sample Size Thickness ＜170mm Color Space / Color Difference Formula / Other Colorimetric Index Haze(ASTM D1003/1044,ISO13468),Transmittance T(ISO),Transmittance T(ASTM) Observer Angle 2° Illuminant D65,A,C Displayed Data PASS/FAIL Result Measuring Time About1.5s Resolution 0.01unit Repeatability Φ20mm,within 0.05 (After preheating and calibration of the instrument, standard deviation values of standard haze tablets with a test haze of about 30 for 30 times were taken at intervals of 5s.) Inter-instrument Error Φ20mm,with 0.4 (After the instrument is preheated and calibrated, the standard deviation between the standard haze tablet and the reference value is tested at an interval of 5s.) Dimension L*W*H=290X211X511mm Weight About7.6kg Power AC 24V, 3A Power adapter power supply Illuminant Life Span 5 years, more than 3 million times measurements Display 7-inch TFT color LCD, Capacitive Touch Screen Data Port USB, Print serial port Data Storage Standard 1000 pcs,sample 20000 pcs Language Simplified Chinese,Traditional Chinese,English Operating Environment 0~40℃（32~104°F） Storage Environment -20~50℃（-4~122°F） Standard Accessory Power Adapter, User Guide,Quality Management Software (download from the official website),USB cable,0% calibration box, measuring aperture. Optional Accessory Micro-printer,Test fixture, standard haze sheet, foot switch Note: The specifications are subject to change without notice.      

Spectrophotometer ST50 is a spectrophotometer developed by GBPI series core technology, using built-in photodiode array (double 20 groups) sensors, imported whiteboard, while taking into account the measurement speed and convenience of operation. The repeatability delta E* AB of ST50 spectrophotometer is easily controlled within 0.03, and the Inter-instrument error delta E* AB is controlled within 0.2, to make the measurement more accurate. And the test data can be used for accurate color analysis and transmission in the laboratory. Application  Spectrophotometer ST50 is equipped with one customized measuring aperture, accurate color measurement and stable performance. It is used for accurate color measurement and quality control in plastic electronics, paint ink, textile and garment printing and dyeing, printing, ceramics and other industries, and can be used for fluorescent sample measurement.   Features  1. Large area photodiode array (dual 20 arrays) sensor  A larger area of double 20 array sensor, strong light saturation, weak light sensitivity and a wider spectrum response range, to ensure the instrument measurement speed, accuracy, stability and consistency, independent core technology, and international standards of the same platform, to achieve complete compatibility. 1. Adopt D/8 structure and SCI/SCE mode  Spectrophotometer ST50 uses a widely international use D/8 optical structure, SCI/SCE (Specular Component Included/Specular Component Excluded) synthesis technology, support SCI+SCE at the same time fast measurement, test time about 1.5 seconds.  2. Combination of full spectrum LED light source and UV light source The use of 400-700nm full spectrum LED light source ensures sufficient spectral distribution in the visible light range, avoiding the spectral loss of specific bands, strong light will not be saturated, weak light is more sensitive, and fluorescence samples can be easily measured. 4. Camera positioning can clearly observe the measured area  The ST50 spectrophotometer has built-in camera. Through the real-time scene-taking of the camera, it can accurately determine whether the measured part of the object is the target center, which improves the measurement efficiency and accuracy.