Description
- The strain gauge is mounted to steel materials, steel structure, etc. to measure the stress change conditions of the structure caused by the excavation work or the surrounding work and used for determining the stability of earth wall panel and temporary facilities.
- It is also used to measure the deformation of the structure by embedding the sensor in the concrete and to determine the stability.
- The VW sensor is very good in responsiveness and reproducibility and most suitable for permanent measure
Composition & Characteristic
▣ Components
① Strain gauge sensor
② Cable
③ Mounting Block
▣ Features
① Excellent reproducibility and responsiveness because it is not affected by cable length or resistance change
② Perfect waterproof structure
③ High stability and high sensitivity design
④ Built-in high-accuracy temperature sensor
Specification
| Model Name | SJ-4000 |
|---|---|
| Sensor applied | Sensor (V/W Type) |
| Measurement Range | 400 ~ 1,250Hz |
| Measurement band | Min 1,000 ~ Max 4,000με |
| Resolution | 1.0με |
| Accuracy | ±0.1% FSR |
| Linearity error tolerance | ±0.5% FSR |
| Coefficient of expansion | 10.8ppm/°C |
| Working Temp. | -40°C ~ 80°C |
| Built-in temp sensor | NTC Thermistor (3KΩ-ATF) |
| Temp sensor working range | Thermistor: -40°C ~ 80°C |
| Temp sensor accuracy | Thermistor: ±1°C |
| Material | Stainless steel 300, Fluor O-RING & High density epoxy Potting |
| Waterproofing | 100m H2O |
| Signal cable | Ø6.4 mm, 0.235mm² X 4C Shielded PVC Sheath Cable |
This is subject to change without prior notice in order to improve the product’s quality.
| Description | SJ-4000 | Components |
|---|---|---|
| Product size | L (mm): 165 | |
| L(Gage) (mm): 150 | ||
| L(C) (mm): 24 | ||
| L(B) (mm): 21 | ||
| W (kg): Sensor: 0.08 / M/B: 0.16 |
Reference
▣ Calculation of strain (με)
– Microstrain(με) = Gage Factor × 10-3 × F2 = Gage Factor × 109 / N2
Where, F= Measurement in Hz unit, N = Measurement in microsec unit, Gage Factor=4.062
▣ Calculation of stress (σ)
– Stress(σ : kg․㎠) = -1.0 × Strain (ε) × Material elastic modulus (E)
▣ Calculation of axial force (P)
– Axial Force(P : ton) = Stress (σ) × Material sectional area (A) ÷ 1000
▣ Standard installation: Steel pipe and Strut