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

Products

Send your inquiry

W&J Instrument Co., Ltd. specializes in manufacturing analytical balance scale, precision weighing scale, density scale, moisture analyzer, digital viscometer, ph meter and test calibration weights. We have passed certification ISO9001:2008, ISO14001:2004, CE and ROHS.

We have over 20 years of production experience and over 15 years of export sales experience, and more than 2000m2 factory.

Economical OIML Class M1 Hexagon-shaped Cast Iron Test Weights China Manufacturer 100g 200g 500g 1kg 2kg Hexagon Weights

Cast iron weights are a measuring tool that measures the weight of an object by comparing its mass. It is done by placing a weight on the balance pan while weighing the weight of another object. Cast iron weights usually have precise weight values because they are calibrated on a precision balance. When the balance weighs an object, the weight exerts a certain force on the balance, which in turn affects the balance point of the lever, thereby achieving accurate measurement of the mass of the object. ‌Field standards for testing industrial devicesClass III, Class IIIL or Class IIIITesting for non-marked scales withoutClass designationVerifying scales are within specified accuracy and tolerance

6 Million mPa.s Newtonian Non-Newtonian Liquid Brookfield Viscosity Measuring Meter Rotary Fluid Digital Viscometer

Working principle of digital viscometerDigital viscometers usually use the rotation method to measure viscosity. The instrument controls the rotation of the rotor through a stepper motor. When the rotor rotates in the liquid, it will be subject to the resistance of the liquid. By measuring the rotation speed and resistance of the rotor, the instrument can calculate the viscosity of the liquid and display it on the LCD screen.

M1 Class Cast Iron 100kg 200kg 250kg 500kg Roller Weights

0-50g and 0-100g Halogen Heating Moisture Analyzer

The moisture content is calculated by heating the sample to make it lose moisture, and then measuring the weight change of the sample. Specifically, the halogen moisture detector uses a ring-shaped halogen infrared heating source to quickly dry the sample, and measures the weight change of the sample in real time through a weighing sensor to finally determine the moisture content percentage. By injecting inert gas halogen elements, the life of the infrared radiation source is extended and the temperature is made more uniform. Compared with the traditional oven heating method, the halogen heating method is more efficient and the sample surface is not easily damaged.

With No. 0 Spindles NDJ-1 NDJ-4 1-100,000 Mpa.s 1-2,000,000 Cps Digital Dial Testing Rotary Viscometer Viscosity Meter

Rotational viscometer is an instrument used to measure fluid viscosity. It mainly measures the viscosity of various liquids by driving a stepper motor to rotate with high subdivision. Its working principle is to calculate the viscosity by measuring the resistance of the fluid during rotation. It is suitable for production and scientific research fields such as grease, paint, slurry, textile, food, medicine, adhesive, cosmetics, etc.

RM-1 10~100,000 mPa.s NDJ-1 Cosmetics Rotating Dial Viscometer

CE 0.1-2,000,000 Cps mPa.s Touch Screen Viscosity Test Meter Rotational Laboratory Viscometer Kinematic Viscosimeter

Kinematic viscosity (also known as the ratio of dynamic viscosity to density) indicates the ease with which a fluid flows.Kinematic viscosity is defined as the ratio of dynamic viscosity to fluid density at the same temperature, with the unit being (m^2)/s.Kinematic viscometers have a wide range of applications in industry and scientific research.By measuring the kinematic viscosity of a fluid, it can support quality control of the production process, product development, instrument calibration, and cost control.

weighing indicator

High AccuracySet different precision and capacity

13,000,000 mPa.s Chemical Industry Rotary Viscosimeter Drug Food Accuracy Viscosity Meter Brookfield Viscometer Digital

Customized M1 Class 500kg 1000kg 2000kg 3000kg 5000kg Platform Type Cast Iron Crane Weights Manufacturer

0.1-0.01% 50g 110g Touch Screen Halogen Determination Moisture Balance

China Manufacturer Customized Cast Iron M1 Class Weights 100 g to 50 kg Slotted Weights With Hanger 1lb to 50lb ASTM

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.