What Materials Are Used in Force Measuring Sensors?

When using a force measuring sensor normally, you should choose the range of the sensor to consider the measured force value, as well as the weight of the accessory tool. When used dynamically, the range of the sensor is usually selected to be 3-5 times greater than the measured force. Considering the impact of pulses on the sensor when the device is at maximum output, it is necessary to choose a range for the sensor that is at least twice the overage. Here, we will briefly introduce the materials used in force measuring sensors.

Material of the elastic body of the force measuring sensor

Generally, alloy steel materials are selected. The alloy material provides both stiffness to ensure consistent deformation and deformation recovery, as well as good weather and corrosion resistance.

Materials of strain gauges and resistance elements in force measuring sensors

Resistance strain gauges are complex composite products. The combination of the substrate of the strain gauge and the strain copper material can vary. Generally, the substrate adopts a high polymer film material and the strain material is high-purity Constantan copper. The quality of the resistance strain gauge is not only related to the material of the substrate and the purity of the composite metal, but also related to factors such as composite process, etching technology and process, etching chemical materials, and post-processing technology and materials.

Material of the adhesive for mounting the strain gauges in force measuring sensors

Two-component epoxy series polymer adhesives are mainly used to mount the resistance strain gauges. The performance of a polymer chemical product is closely related to the physical and chemical indicators of each component.

Material of the sealant in force measuring sensors

In the early stage of force measuring sensors, which have insufficient welding technology and equipment, special silicone rubber sealants are used. Silicone rubber has excellent performance in various aspects, such as corrosion resistance, moisture resistance, aging resistance, and insulation.

Material of the wires used in force measuring sensors

Wires are still a part of force measuring sensors. Silver-plated wires have better conductivity than copper wires, and copper wires are certainly better than aluminum wires. The function of wires is obvious.

Material and method for sealing the wires in force measuring sensors

Every component of a force measuring sensor will affect its technical performance. If there is no appropriate method for fixing or sealing the wires, it is the bottleneck for the failure of the force measuring sensor. Especially when adding a sealing head to fix the wires, the material and tightening force of the fastener will also affect the final technical performance of the force measuring sensor.