ESMNJ05 Rotary Shaft Dynamic Torque Sensor for10 20 30 50 100 Nm
Working Principle
The ESNNJ05 torque sensor detects the deformation of the shaft by attaching strain gauges to the rotating shaft and utilizing the resistive strain effect. The sensor converts the strain caused by the shaft's torsion into electrical signals, which are then transmitted to the data acquisition system via wireless transmission or a slip ring.
The basis of a strain-type dynamic torque sensor is the strain gauge effect and the Wheatstone bridge principle:
1. Elastic deformation: Inside the sensor is a specially designed elastic measuring shaft. When torque is applied to the shaft, it undergoes slight torsional deformation (shear strain).
2. Strain gauge sensing: Strain gauges are affixed to the surface of the elastic shaft at specific angles (usually 45° to the shaft axis, where the shear strain is greatest).
3. Resistance change: The deformation of the shaft causes the strain gauges to stretch or compress, changing their resistance.
4. Bridge output: The strain gauges form a full Wheatstone bridge circuit. When torque is applied, the bridge becomes unbalanced and outputs a weak voltage signal (in the millivolt range) proportional to the torque.
Product Features
- Diverse signal output
- High measurement accuracy
- Flexible usage
- Wide measurement range
Product detail
Technical Specifications
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Measuring range: |
0~10/20/30/50/100 Nm |
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Comprehensive accuracy: |
±0.1; ±0.3; ±0.5% F.S (linear + repeatability + hysteresis) |
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Output sensitivity: |
1.0 to 1.5.0 mV/V, 4-20 mA, 0-5/0-10 Vdc |
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Working temperature: |
-10~+80 °C |
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Temperature compensation range: |
room temperature ~ +60 °C |
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Zero temperature effect: |
±0.1 %F.S/10 °C |
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Excitation voltage: |
12 VDC |
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Insulation resistance: |
2000 MΩ/100VDC |
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Input resistance: |
700±10/350±10 Ω |
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Output resistance: |
700±5/350±5 Ω |
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Zero output: |
0~±1 %F.S |
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Safety overload rate: |
120 % F.S |
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Factory standard line length: |
3 m |
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Electrical connection: |
input (power +): 1-red output signal +: 2- yellow input (power -): 4-green output signal - : 3-white |
