Description
- The electric joint meter is used to measure dimensional changes at expansion joints of concrete structures such as bridges and dams, as well as surface connection parts of rock masses or slopes.
- A high-precision, linear potentiometer is built into the housing, allowing the wire to push or pull the sensor. This movement is transmitted to the potentiometer, which converts the length variation into an electrical signal and sends it to the output device.
- By applying a conversion factor, this output signal can easily be converted back into the length displacement. The difference between the initial and current measurement values represents the displacement, allowing easy monitoring of the rate, ratio, and trend of the joint’s change.
Composition & Characteristics
▣ Components
① Joint meter sensor
② Wire
③ Fixing frame
▣ Features
① High stability and reliability
② Equipped with a high-precision linear potentiometer for excellent reproducibility and responsiveness
③ Adjustable measuring range (0 ~ 1,000 mm)
④ Built-in high-accuracy temperature sensor
Specification
| Model Name | SJ-4700 |
|---|---|
| Applied Sensor | Electric Sensor (Electric Type) |
| Measuring Range | 0 ~ 1,000 mm |
| Resolution | 0.1 mm |
| Accuracy | ±0.1% FSR |
| Linearity Error | ±0.5% FSR |
| Operating Temperature | -20°C ~ 80°C |
| Linearity | Within ±1.0% |
| Dimensions | Sensor: 75 × 120 × 68 mm / Plate: 95 × 190 × 68 mm |
| Weight | 1.38 kg |
| Material | Stainless steel, Wire φ=0.5 mm |