Step 1: Determine the requirements for the sensor
Measuring range: The measuring range is an important factor for the sensor. A small measuring range can result in overload and damage. On the other hand, a large range may result in inaccurate measurements. The sensor’s measuring range should be 10% to 30% larger than the upper limit of measurement. This depends on the specific situation.
Output signal: There are two types of weighing force sensors: analog output sensors and digital output sensors. The conventional output is an analog signal in the mV range.
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Force Direction: Conventional sensors can measure tension, compression, or both.
Not possible to remove the adverb. Different materials have different overload resistance and natural frequencies.
Installation dimensions: Different practical applications have different requirements for sensor dimensions. Conventional sensors are available in single point, S-type, cantilever beam and spoke types.
Accuracy: Accuracy is an important performance indicator of the sensor. Generally, the higher the accuracy, the higher the cost. You should select it based on the criteria of the entire measurement system.
Sampling frequency: There are common dynamic measurement and static measurement. The sampling frequency determines the choice of sensor structure.
Environmental factors: humidity, dust index, electromagnetic interference, etc.
Other requirements such as wire specifications, cost considerations, etc.
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Step 2: Understand the main parameters of the sensor
Rated load: This is the value designers measure based on specific technical indicators when creating this sensor.
Sensitivity: The ratio of the output increment to the applied load increment. Usually expressed as the rated output in mV per 1V of input voltage.
The sensor can detect the change in weight (force).
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Zero output: The output of the sensor when there is no load.
Safe overload: The highest load a sensor can take without damaging its settings. Usually expressed as a percentage of the rated range (120% F.S.).
The sensor can manage the extra weight added without causing damage. Expressed as a percentage of the rated capacity.
Input impedance: This is the impedance measured at the sensor’s input. It occurs when the output is short-circuited. The input impedance of the sensor is always greater than the output impedance.
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The sensor displays the output impedance when someone shorts the input. When using sensors from different manufacturers together, make sure their input impedances match.
Insulation resistance works like a resistor. It connects in series between the sensor bridge and the ground. The insulation resistance affects the performance of the sensor. If the insulation resistance drops too low, the bridge won’t function well.
Excitation voltage: Generally 5 to 10 volts. Weighing instruments usually have a regulated power supply of 5 or 10 volts.
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Temperature range: This shows the conditions for using the sensor. For example, a normal temperature sensor is generally marked as -10°C to 60°C.
Wiring method: Detailed wiring instructions are generally provided in the product description.
Protection class: This shows how well the item resists dust and water. It also indicates resistance to corrosive gases and other harmful substances.
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Step 3: Select the appropriate sensor
Once you know the requirements and key parameters, you can pick the right sensor. Also, as sensor manufacturing improves, customized sensors are now more common. They help meet the needs of various applications. Customizable parameters include:
Rated range
Dimensions
Material
Post time: Feb-12-2025
