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A professional manufacture and sales of various electronic balances, moisture analyzers, viscometers and laboratory instrument manufacturer of weight measure instruments.​​​​​​​.

Calibration Weights

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Calibration Weights

The strength of our product will help increase our sales and enhance our popularity in the market. We develop Calibration Weights combining all high-quality raw materials with great and stable performance. In this way, we guarantee that this product has multiple features mainly including Calibration Weights and so on. Moreover, its unique and eye-catching appearance makes it highly outstanding among other similar products.
Calibration Weights
W&J China Calibration Weights manufacturers - W&J,Good product quality, reasonable price and high cost performanceWe provide standard weights such as cast iron weights and stainless steel weights. It can also be customized according to customer needs. All weights comply with OIML international standards. It is suitable for laboratory testing, measurement testing institutions, pharmaceutical factories, food industry, environmental testing, etc.Classification of calibration weightsAccording to different standards and uses, calibration weights can be divided into different types:a. Classification by material: mainly including weights made of iron, stainless steel, aluminum, copper and other materials.b. Classification by accuracy: such as E1, E2, F1, F2, etc., where E1 is the highest accuracy level.c. Classification by shape: such as disc type, cylindrical type, rod type, etc.
E1 E2 F1 F2 M1 ASTM Standard Non-magnetic 1mg-500mg 100g 200g 500g 1kg 2kg 5kg 10kg 20kg 25kg 50kg Test Weights Set
Definition and function of weightsA calibration weight is a precisely manufactured mass block used to provide a standard mass or load during the measurement process. Its main applications include:a. Calibration of measuring equipment: such as balances, electronic scales, etc., to ensure that the readings they display are accurate.b. Calibration of other equipment: such as certain mechanical equipment, used to determine the load or other parameters of the machine.c. Providing standards for scientific research: In some experiments, accurate mass is required as a reference, and weights come in handy.
M1 F2 F1 Class Grip Handle Test Weight Stackable Calibration Counter Pillow Weights
Definition and function of weightsA calibration weight is a precisely manufactured mass block used to provide a standard mass or load during the measurement process. Its main applications include:a. Calibration of measuring equipment: such as balances, electronic scales, etc., to ensure that the readings they display are accurate.b. Calibration of other equipment: such as certain mechanical equipment, used to determine the load or other parameters of the machine.c. Providing standards for scientific research: In some experiments, accurate mass is required as a reference, and weights come in handy.
E1 E2 F1 F2 M1 Class 5kg 10kg 20kg 25kg Stainless Steel Reloading Cylindrical Big Weighing Calibration Weights
Place of Origin: Jiangsu China (Mainland)Brand: W&JMaterial: JF-1 stainless steelNominal Value: 1mg-20kgClass: E1, E2, F1Polarization: E1≤2.5μT; E2≤8μT; F1≤25μTSusceptibility: <0.005-0.002Density: 8.0g/cm³Finish: polishingStyle: CylindricalApplication: lab, chemical, medical, commercial and educational use Nominal Value: 1mg-50kgMaterial: 304 stainless steelColor: SilverDensity: 7.9g/cm³Susceptibility: <0.05-0.1Class: F1,F2,M1Polarization: F1≤25μT; F2≤80μT;M1≤250μTFinish: Polishing
Customized Standard Testing Stainless Steel Test Hooked Weights manufacturers From China | W&amp;J
Standard Testing Stainless Steel Test Hooked Weights  compared with similar products on the market, it has incomparable outstanding advantages in terms of performance, quality, appearance, etc., and enjoys a good reputation in the market.W&J summarizes the defects of past products, and continuously improves them. The specifications of Standard Testing Stainless Steel Test Hooked Weights can be customized according to your needs.
F2 M1 Class OIML Round Opening Weight Slotted Hooked Weight Set
Material: 304 stainless steelColor: SilverDensity: 7.9g/cm³Susceptibility: <=0.05Class: F2,M1Polarization: F2≤80μT;M1≤250μTFinish: Polishing
Brass Weights
Brass weightsClass F1/F2/M1
Customized Test Weight Sets Calibration Standard Weights Manufacturers From China | W&amp;J
Customized Test Weight Set  compared with similar products on the market, it has incomparable outstanding advantages in terms of performance, quality, appearance, etc., and enjoys a good reputation in the market.W&J summarizes the defects of past products, and continuously improves them. The specifications of Customized Test Weight Set can be customized according to your needs.Stainless Steel/Chrome plated/Brass
E1 E2 F1 F2 M1 OIML Standard 1mg-2kg 5kg 10kg 20kg  Low Magnetic Stainless Steel Counterpoise Calibration Weights Set
Definition and function of weightsA calibration weight is a precisely manufactured mass block used to provide a standard mass or load during the measurement process. Its main applications include:a. Calibration of measuring equipment: such as balances, electronic scales, etc., to ensure that the readings they display are accurate.b. Calibration of other equipment: such as certain mechanical equipment, used to determine the load or other parameters of the machine.c. Providing standards for scientific research: In some experiments, accurate mass is required as a reference, and weights come in handy.
Why Choose Our Laboratory Instruments?

Our core technical team possesses interdisciplinary capabilities in mechanical design, electronic engineering, and software algorithms, enabling us to provide customized development services including special weighing range customization (such as ultra-micro weighing at the 0.01mg level or large weighing ranges above 10kg), explosion-proof certification (ATEX/IECEx Zone 1/2), integration of specific communication protocols (Modbus RTU, Profinet, 4-20mA analog output), and multilingual localization of the human-machine interface.

At the project execution level, we employ a stage-gate management model. Customers can participate in multiple rounds of technical reviews before the design freeze, and the engineering development phase only begins after the functional specification is confirmed, effectively controlling project change risks and delivery uncertainty.

On the manufacturing side, the company boasts a 3,000-square-meter self-owned production line equipped with fully automated calibration and testing benches and aging test chambers. This allows for flexible switching between small-batch trial orders (5-50 units) and large-scale orders, with a minimum order quantity (MOQ) at the lowest level in the industry.

In terms of after-sales service, customized instruments enjoy the same 24-month warranty commitment as standard products, a 10-year spare parts inventory commitment for key components, and value-added services such as on-site installation and commissioning, operation training, and metrological calibration guidance, ensuring customers receive original manufacturer technical support throughout the entire instrument lifecycle.

Precision Analytical Balance
A high-precision electromagnetic force-compensation weighing system delivering 0.1mg readability with automatic internal calibration, designed for quantitative analysis in regulated pharmaceutical, chemical, and research laboratory environments.
Digital Viscometer
A rotational digital viscometer with broad measurement range (10–6,000,000 mPa·s), featuring optional Peltier temperature control and compliant with FDA 21 CFR Part 11 for electronic data integrity in quality control applications.
Moisture Analyzer
A halogen-heated rapid drying moisture analyzer achieving 0.001g reading precision, equipped with an intelligent endpoint detection algorithm that automatically terminates heating upon sample constant-weight confirmation, suitable for high-throughput QC testing across food, chemical, and pharmaceutical sectors.
Calibration Test Weights
OIML R 111-compliant precision test weights available in E1 through M1 accuracy classes, crafted from non-magnetic austenitic stainless steel with mirror-finish surface treatment, traceable to CIPM mutual recognition arrangements for metrological calibration applications.
Our customized services are underpinned by nearly 30 years of independent R&D and manufacturing experience in precision instruments, building a closed-loop capability encompassing the entire process from capturing customer needs, designing conceptual solutions, verifying functional prototypes, to large-scale mass production and delivery.

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We also provide customized electronic balances/ laboratory scales with special functions according to customer needs.


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If you have any question, please contact us.

Tel: 0086-(0)519-85286336

Mobile: 0086-136 0612 1307

E-mail: weighinginstru@gmail.com

Wechat/Whatsapp: 0086-136 0612 1307

Add: Huayuan Road, Mudu Town, Jiangsu Province, PRC

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