Description
The Electric Joint Meter is used to measure the size change of the surface, connection parts, and cracks in concrete structures.
A high-precision and linear potentiometer is mounted inside the housing, allowing the rod to push or pull the sensor when deformation occurs. The movement is then transmitted to the potentiometer, which converts the length change into an electrical signal that is sent to the output device.
This output signal can easily be converted into a length displacement value by applying the conversion coefficient. The difference between the initial (default) measurement value and the current measurement value represents the displacement, so that the change speed, ratio and tendency of the crack can easily be measured.
Composition & Characteristics
▣ Components
- Crack meter sensor
- Cable
- Protection box
▣ Features
- High stability and reliability
- Excellent reproducibility and responsiveness with built-in high-precision linear potentiometer
- Various measurement ranges available (10 mm ~ 300 mm)
- Built-in high-precision temperature sensor
Specification
| Model Name | SJ-4601 |
|---|---|
| Sensor applied | Sensor (Electric Type) |
| Measurement range | 0 ~ 50 mm |
| Resolution | Below 0.003 mm |
| Accuracy | Below 0.1% |
| Temp expansion coefficient of resistance | ±400 ppm/°C |
| Rated power | 0.6 W ~ 4 W |
| Linearity | Below ±1% |
| Total resistance deviation | ±20% |
| Dimension | Sensor: L = 195 mm, D (Ø) = 28 mm |
| Weight | 0.23 kg |
| Material | Stainless Steel |