Parallel Beam Weighing Sensor CZL601AA

Product Introduction

The parallel beam weighing sensor is a force-sensitive detection element based on the principle of strain resistance, with double parallel beams or single parallel beam elastic bodies as the core structure. When subjected to force, the bending deformation of the beam body drives the strain gauge to produce resistance changes, which are then converted into standardized electrical signals. It has the advantages of light load, high precision, flat anti-bias load, and easy installation, and is widely used in small-scale weighing, flat force, and embedded measurement scenarios. The following is a detailed explanation from the core dimension to meet the needs of product selection, technical evaluation, and scheme writing.

1. Product Features and Functions

Core Features

• Structural Design: Adopts an integrated parallel beam structure (beam body thickness 2 - 15mm, length 20 - 150mm), with uniform stress distribution concentrated in the middle section of the beam body, supports multi-angle forces in the plane, has outstanding anti-eccentric load capacity (can withstand plane eccentric loads of ±20% - ±30% of the rated load), and has no obvious stress blind spots.
• Precision Performance: Accuracy levels cover C1 - C3, with mainstream models reaching C2. Nonlinearity error ≤ ±0.01%FS, repeatability error ≤ ±0.005%FS, zero drift ≤ ±0.002%FS/℃, and shows better precision performance than similar sensors in small-range scenarios from 0.1kg - 500kg.
• Materials and Protection: The elastic body commonly uses aluminum alloy (for lightweight scenarios), alloy steel (for conventional industrial scenarios), or 304/316L stainless steel (for corrosive scenarios), with the surface treated by anodizing, nickel plating, or passivation; the protection level is typically IP65/IP67, and food-grade models can reach IP68, suitable for various complex environments.
• Installation Compatibility: Standardized mounting holes (threaded holes or smooth holes) are provided at the bottom, supporting bolt fixing or adhesive installation. Some micro models can be installed in an embedded manner, suitable for the narrow installation space of desktop weighing instruments and automated equipment, and a single unit can meet the plane weighing requirements.

Core Functions

• Light Load Force Measurement: Focuses on static/quasi-dynamic light load weighing (response time ≤ 4ms), with a measuring range covering 0.1kg - 500kg, and typical applications concentrated in the 1kg - 200kg range. The micro model can achieve ultra-small range measurement of 0.01kg.
• Multiple Types of Signal Output: Provides analog signals (4 - 20mA, 0 - 3V, 0 - 5V) and digital signals (RS485/Modbus RTU, I2C). The micro intelligent model integrates a signal conditioning module and can be directly connected to single-chip microcomputers and IoT modules.
• Safety Protection Function: Integrates wide temperature range temperature compensation (-10°C - 70°C), has overload protection (150% - 200% of the rated load, typically 150% for aluminum alloy models), and some models include an anti-shock buffer structure.
• Long-Term Stability: Fatigue life ≥ 10⁷ cycles of load, with annual drift ≤ ±0.01%FS under rated load, suitable for long-term continuous operation scenarios such as supermarkets and laboratories.

2. Core Problems Solved

• Inadequate accuracy in light load scenarios: To address the issue of excessive error in traditional sensors for small range scenarios below 10kg, through optimized design of beam body stress, the measurement error is controlled within ±0.005%FS, meeting high-precision requirements such as food weighing and pharmaceutical metering.

• Inaccurate measurement of planar eccentric load: The uniform stress distribution characteristic of the parallel beam structure can effectively offset the influence of eccentric load caused by the offset of the weighed object, solving the accuracy problem of non-fixed material placement positions in desktop weighing instruments and sorting equipment.

• Difficulties in equipment integration and installation: The compact structure and flexible installation method meet the embedded installation requirements of automated equipment and smart home appliances, eliminating the need to modify the main structure of the equipment and reducing integration costs.

• Poor adaptability to multiple environments: Through material and protection level upgrades, problems such as sensor damage and signal drift in scenarios such as humidity (e.g., aquatic product weighing), corrosion (e.g., chemical reagent weighing), and dust (e.g., flour processing) are solved.

• Cost pressure on small devices: A single sensor can meet the planar weighing requirements, eliminating the need for multiple sensors to be used in combination. Meanwhile, the aluminum alloy material reduces the product weight and cost, solving the cost control problem of small weighing instruments and consumer electronics.

3. User Experience

• Ultra-simplified installation: Standardized mounting holes and positioning reference surfaces eliminate the need for professional calibration tools. Installation can be completed with an ordinary screwdriver, with low flatness requirements (≤0.1mm/m), and single-person commissioning can be completed within 10 minutes.
• Low operation threshold: Supports one-button zeroing and single-point calibration of weighing instrument (only requires a standard weight of 100% rated load). Digital models can be quickly calibrated via computer software, enabling easy operation even by non-professionals.
• Extremely low maintenance cost: The fully sealed structure reduces dust and moisture intrusion, with an annual average failure rate ≤0.2%. Aluminum alloy models are lightweight (minimum only 5g), easy to replace, and do not require disassembly of large structures during maintenance.
• Precise data feedback: Static measurement data fluctuation ≤±0.003%FS, no lag in quasi-dynamic scenarios. Digital models come with built-in zero drift compensation function, eliminating the need for frequent calibration and ensuring strong data stability.
• Good integration and adaptability: Micro models are small in size (minimum dimensions 20mm×10mm×5mm), can be embedded inside smart devices without affecting the device's appearance design. Signal output is compatible with mainstream small controllers, Plug and Play.

4. Typical Usage Scenarios

1）Civil and Commercial Light Load Weighing Instruments

• Supermarket Pricing Scales/ Electronic Platforighing accuracy at different placement positions, with an error ≤ ±1g.

• Express Delivery Electronic Scales: 1-50kg express delivery weighing equipment, made of stainless steel for anti-fouling and easy cleaning, with IP67 protection rating suitable for the humid and dusty environment of express delivery outlets, supporting rapid continuous weighing.

• Kitchen Scales/Baking Scales: 0.01-5kg high-precision kitchen scales, with a micro parallel beam sensor achieving milligram-level accuracy, digital signal output compatible with high definition displays, meeting the need for precise ingredient proportioning.

2）Industrial Automation Equipment

• Automated Sorting Equipment: Weight sorters for the food and hardware industries, installed under the sorting conveyor belt, detecting product weight in real-time and linking with the sorting mechanism, with sorting accuracy up to ±0.1g.

• Assembly Line Material Detection: Material shortage detection for electronic component assembly lines, determining whether materials are missing through weighing (e.g., mobile phone battery assembly), with a response time ≤ 4ms suitable for high-speed production lines.

• Quantitative Control of Packaging Machines: Quantitative weighing for small particle/powder packaging machines, C2 grade accuracy models ensure the weight error per bag ≤ ±0.2%, meeting metrological standards.

3）Food and Pharmaceutical Industries

• Pharmaceutical Ingredient Weighing: Weighing of small-dose raw materials (0.1-10kg) in the pharmaceutical industry, made of 316L stainless steel + GMP certification, with a polished surface without dead corners for easy disinfection and sterilization, accuracy ≤ ±0.01%FS.

• Aquatic/Meat Weighing: Cutting and weighing equipment for slaughterhouses and aquatic markets, with waterproof and anti-corrosion design (IP68), can be directly washed, suitable for the humid and water-rich working environment.

4）Scientific Research and Experimental Equipment

• Biological Experiment Weighing: Weighing of reagents and samples in laboratories, ultra-small range models (0.01-1kg) can meet the high-precision requirements for microbial culture and chemical reagent proportioning.

• Force Measurement of Medical Equipment: Force/weight measurement for rehabilitation equipment (e.g., grip strength meters) and medical scales (baby scales), aluminum alloy lightweight design improves equipment portability, with accuracy up to ±0.005%FS.

5）Smart Consumer Electronics and Internet of Things (IoT) Devices

• Smart Home Appliances: Clothing weight detection for washing machines and bean bin weighing for coffee makers, micro embedded sensors enable intelligent control of devices, enhancing User Experience.

• IoT End Points: Weight monitoring for smart shelves and smart trash cans, low-power digital models support NB-IoT wireless transmission, suitable for IoT remote management scenarios.

5. Usage Instructions (Practical Guide)

1） Installation Process

• Preparation: Clean the installation surface (remove oil stains and burrs), check the sensor appearance (no deformation of the beam body, no damage to the cable), select the appropriate mounting bolts according to the range (avoid using high-strength bolts for aluminum alloy models).

• Positioning and Fixing: Horizontally install the sensor on the load-bearing surface, ensure the load acts vertically above the beam body (avoid lateral impact); use a torque wrench for bolt tightening (5-10N·m for aluminum alloy models, 10-20N·m for alloy steel), prevent over-tightening from damaging the beam body.

• Wiring Specifications: For analog signals, follow "red - power +, black - power -, green - signal +, white - signal -", for digital signals, connect according to the pin definition; avoid pulling the cable when wiring for micro models, it is recommended to reserve 5cm of redundant length.

• Protection Treatment: In a humid environment, seal the cable connector with waterproof tape, clean the sensor surface promptly after use in the food industry to avoid corrosion from residual materials.

2） Calibration and Debugging

• Zero Calibration: Turn on the power and preheat for 10 minutes, execute the "zero calibration" command,Ensure that the zero output is within the range of ±0.001%FS. If the deviation is too large, check whether the mounting surface is flat.

• Load Calibration: Place standard weights equivalent to 100% of the rated load (use standard weights for small-range scenarios), record the output signal value, correct the error through the meter or software, and ensure that the error ≤ the allowable value of the corresponding accuracy class (Class C2 ≤ ±0.01%FS).

• Eccentric Load Test: Place the same weights at different positions on the load-bearing surface of the sensor, observe the consistency of the readings, and the deviation should ≤ ±0.02%FS; otherwise, adjust the installation levelness.

3） Routine Maintenance

• Regular Inspection: Clean the sensor surface weekly, check whether the wiring is loose monthly; calibrate commercial weighing instruments quarterly and laboratory equipment monthly.

• Fault Handling: When data drifts, first check the power supply voltage (stable at 5-24V DC, usually 5V for micro models); when the reading is abnormal, check whether there is an overload (aluminum alloy models are prone to permanent deformation under overload), and replace the sensor if necessary.

6. Selection Method (Precisely Match Requirements)

1） Determination of Core Parameters

• Range Selection: Select the model according to 1.2-1.4 times the actual maximum weight (e.g., for a maximum weighing of 10kg, a 12-14kg sensor can be selected), and avoid selecting a range that is too large in light-load scenarios to prevent insufficient accuracy.

• Accuracy Class: Select Class C1 (error ≤ ±0.005%FS) for laboratory/medical applications, Class C2 (error ≤ ±0.01%FS) for industrial metrology, and Class C3 (error ≤ ±0.02%FS) for civil weighing instruments.

• Signal Type: Select analog signals (0-5V) for civil weighing instruments, digital signals (I2C/RS485) for smart devices, and models with wireless modules for IoT scenarios.

2）Selection Based on Environmental Adaptability

• Temperature: Select ordinary models for normal scenarios (-10°C~60°C), low-temperature-resistant models for low-temperature refrigeration scenarios (-20°C~0°C), and high-temperature compensation models for high-temperature scenarios (60°C~80°C).

• Medium: Select aluminum alloy for dry environments, 304 stainless steel for wet/food industries, and 316L stainless steel for chemical corrosion environments.

• Protection Class: ≥IP65 for indoor dry environments, ≥IP67 for wet/washed environments, and ≥IP68 for underwater or highly corrosive environments.

3）Installation and System Compatibility

• Installation Method: Select bolt fixing for desktop weighing instruments and embedded installation for smart devices; in space-limited scenarios, give priority to micro models with a length ≤30mm.

• Compatibility: Confirm that the power supply voltage and signal type of the sensor match the controller, and for micro models, check the pin definitions to avoid wiring errors that could burn out the module.

4）Confirmation of Additional Requirements

• Certification Requirements: The food and pharmaceutical industries require FDA/GMP certification, metrology scenarios require CMC certification, and export products require OIML certification.

• Special Functions: Select models with a response time ≤3ms for high-speed sorting, IoT models with a standby current ≤10μA for low-power scenarios, and integrated models without threads and dead corners for hygienic scenarios.

Summary

The parallel beam load cell has core advantages of "light load with high precision, planar anti-eccentric load, and convenient integration", which mainly solves problems such as accurate weighing in small ranges, material eccentric load, and embedded installation of equipment. User Experience focuses on simple operation, worry-free maintenance, and controllable cost. When selecting a model, it is necessary to first clarify the four core requirements of range, accuracy, installation space, and environment, and then make a decision based on system compatibility and additional functions; during use, avoid overload and lateral impact, and strictly follow the regular calibration specifications to ensure long-term stable operation. It is suitable for light-load weighing instruments, automation equipment, food and pharmaceutical industries, etc., and is the optimal sensing solution for small-range and planar weighing scenarios.

Detail Display

Parameters