Steel Micro Sensor CZL902

Product Introduction

Micro load cells are miniaturized weight measurement components developed based on the strain effect. Their core converts weight signals into measurable electrical signals through micro-sensitive structures (such as strain gauge-type elastomers). Their volume is usually controlled within a range from a few cubic centimeters to several tens of cubic centimeters, with measurement ranges covering from grams to kilograms, combining the dual advantages of "small size" and "high precision". As the core component for weighing scenarios in light-load and confined spaces, they are widely used in fields such as medical equipment, consumer electronics, intelligent equipment, and scientific research testing, and are the key foundation for realizing weight sensing in micro-devices.

1. Core Features and Functions

1) Miniaturization Core Characteristics

• Ultra-small volume and lightweight: The regular size ranges from 5mm×5mm×2mm to 30mm×20mm×10mm, and some customized models can be reduced to millimeter level, with a weight of only 0.1g~5g, enabling easy embedding into confined spaces such as smart watches and micro pumps without affecting the overall structural design of the device.

• Compact structural design: Most adopt integrated packaging, integrating sensitive elements and signal conditioning circuits into a micro housing. Some models support thin and light installation forms such as surface mount and lead type, suitable for direct soldering or snap-fit fixation on PCB boards.

2) Weighing Performance Advantages

• Wide-range accurate measurement: The measurement range covers 0.1g~50kg, with a core measurement accuracy of ±0.01%FS~±0.1%FS and a resolution of up to 0.001g, capable of meeting both microgram-level sample weighing in laboratories and gram-level weight monitoring in consumer electronics.

• Fast dynamic response: The response time is ≤10ms, enabling real-time capture of instantaneous weight changes, such as high-speed light-load weighing on automated sorting lines and drip rate weight monitoring in medical infusion, avoiding measurement deviations caused by signal delay.

• Stable anti-interference ability: Built-in temperature compensation module (adapted to -10℃~60℃ working environment) to offset the impact of environmental temperature fluctuations; uses differential signal output or electromagnetic shielding design to resist electromagnetic interference from internal circuits of the device, ensuring data stability.

3) Integration and Adaptation Functions

• Multi-signal output adaptation: Supports analog signals (0-5V, 4-20mA) and digital signals (I2C, SPI, UART) output, and can be directly connected to micro Control Units such as MCUs, single-chip microcomputers, and small PLCs without the need for additional signal amplification modules.

• Material and medium compatibility: Sensitive elements mostly use 316L stainless steel, titanium alloy, or engineering plastics, and the housing is treated with anti-corrosion, suitable for different weighing media such as medical body fluids, food raw materials, and electronic components, avoiding contamination or corrosion damage.

• Low power consumption characteristics: Static power consumption is ≤10mA, and can be as low as 10μA in sleep mode, suitable for battery-powered portable devices (such as handheld weighing scales and smart wearable devices) to extend battery life.

2. Core Industry Pain Points Addressed
In light-load and miniaturized weighing scenarios, traditional load cells (such as platform scale sensors and industrial weighing modules) have issues such as "excessive size, high power consumption, insufficient accuracy, and difficulty in integration." Miniature load cells specifically address the following core pain points:
• Obstacles to integration in miniature devices: Solve the problem that traditional sensors cannot be embedded in small devices, such as the body weight monitoring function of smart bracelets and the liquid medicine weight control of miniature medical pumps, and meet the dual requirements of "weighing function + miniaturization" of devices through a small form factor design.
• Difficulties in high-precision measurement under light loads: Solve the problem of insufficient accuracy of traditional sensors in gram-level and milligram-level weighing, such as weighing of trace samples in laboratories and weight detection of electronic component pins, providing reliable data for precision production and scientific research.
• Power consumption issues in portable devices: Solve the problem of short battery life caused by high power consumption of traditional sensors, such as handheld express weighing scales and outdoor sample collection weighing devices, with low power consumption characteristics extending the single-use time.
• Limitations of complex installation space: Meet the weighing requirements in narrow and specially structured spaces, such as weighing of internal components of automated equipment and monitoring of fluid weight in pipelines, breaking through space limitations through patch-type and embedded installation.
• Compatibility issues of signals in multiple scenarios: Solve the problem that the signals of traditional sensors do not match those of miniature control units. Digital signal output models can be directly connected to single-chip microcomputers and MCUs, reducing the complexity of circuit design in small devices and lowering R&D costs.

3. Highlights of User Experience
• High integration convenience: Standardized pin layout and package dimensions support direct soldering or snap-fit fixation on PCB boards, eliminating the need for complex mechanical structures, and reducing integration time to within 30 minutes, significantly improving equipment production efficiency.
• Simple debugging operation: Digital signal models support one-key calibration of zero point and range through commands, and analog signal models have excellent linearity, requiring only simple circuit debugging to be put into use, lowering the technical threshold for R&D personnel.
• Strong stability in use: Temperature compensation and anti-interference design ensure that the data drift is ≤±0.05%FS/year, eliminating the need for frequent calibration in portable and embedded scenarios and reducing post-maintenance workload.
• Flexible and diverse model selection: There is a wide range of models with different ranges, signal types, and installation methods, allowing direct selection based on equipment size, power supply voltage, and accuracy requirements. Some manufacturers support small-batch customization to meet personalized needs.
• Reasonable cost control: The cost per unit can be controlled between tens and hundreds of yuan during bulk procurement, with costs reduced by more than 50% compared to customized miniature sensing solutions; at the same time, low power consumption characteristics reduce the overall energy consumption cost of equipment.

4. Typical Use Scenarios
1) Healthcare
• Infusion Monitoring Devices: Embedded in infusion pumps, they monitor the real-time weight change of the medicinal solution, calculate the infusion rate, and trigger an alarm when the solution is about to run out, avoiding the risk of empty bottles, such as precise infusion control in intensive care units.
• Rehabilitation and Nursing Equipment: Used in intelligent rehabilitation scales and weight perception modules of prosthetics, such as monitoring weight changes during elderly rehabilitation training or providing force feedback for prosthetics, enhancing rehabilitation safety.
• Laboratory Medical Equipment: In micropipettes and biochemical analyzers, they measure the weight of reagents or samples to ensure the accuracy of sample addition, such as weighing micro-samples of COVID-19 test reagents.
2) Consumer Electronics and Smart Wearables
• Smart Wearable Devices: Integrated into smart bracelets and smart watches, they enable indirect measurement of body weight and body fat or monitor the force exerted during exercise, such as analyzing the weight of the foot when landing while running.
• Smart Home Devices: Used for weighing raw materials in smart kitchen scales and coffee makers, such as precisely weighing coffee powder to control brewing concentration; or monitoring the fullness of smart trash cans (by judging the trash capacity through weight).
• Portable Weighing Tools: Such as mini express scales and luggage weighers, with small size and low power consumption design, they are convenient for users to carry around and measure the weight of items in real time.
3) Industrial Automation and Micro Manufacturing
• Electronic Component Production: In SMT pick-and-place production lines, they monitor the weight of components such as chips and resistors to screen out defective products; or in semiconductor packaging, they measure the weight of the encapsulation colloid to ensure packaging quality.
• Micro Automation Equipment: Used in the end-effectors of micro assembly robots to sense the weight of the grasped parts and determine whether the grasping is successful, such as weighing and detecting during the assembly of mobile phone camera modules.
• Fluid Control Equipment: Embedded in micro metering pumps and fuel injectors, they monitor the fluid delivery volume through weight, such as weighing micro amounts of fuel in fuel injection systems to ensure combustion efficiency.
4) Scientific Research and Testing
• Materials Science Research: Measure the weight of small material samples (such as nanomaterials and thin film materials) or the weight change of materials during stretching and compression, providing data for performance analysis.
• Environmental Monitoring Equipment: In micro water quality monitors and air sampling devices, they measure the weight of the collected samples to calculate the pollutant concentration, such as weight analysis after atmospheric particulate matter sampling.
5) Logistics and Retail
• Micro Sorting Systems: At the end of the express automated sorting line, they weigh small packages to classify them by weight; or at the self-checkout counter of unmanned supermarkets, they identify products through weighing (in conjunction with a weight database).
• Retail Weighing Equipment: Such as jewelry scales and precious metal scales, used for precise weighing of precious items such as gold and diamonds, with a small size that can be placed on the counter without taking up too much space.

Summary

Micro load cells, with "small size, high precision, and low power consumption" as their core competitiveness, have broken the limitations of traditional weighing devices in terms of space and range, precisely meeting the light-load weighing requirements in fields such as medical, consumer electronics, and micro manufacturing. Their convenient integration method, stable performance, and reasonable cost control not only drive the functional upgrade of micro devices but also provide reliable support for various industries to achieve "precision, miniaturization, and intelligence" in weighing, becoming an indispensable and important branch of modern sensing technology.

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