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Waterproof High Precison Strain Gauges

Railway tracks are subjected to extreme dynamic loads, severe environmental conditions, and continuous vibration. Although strain monitoring is essential for ensuring safety and enabling predictive maintenance, traditional load cell sensors frequently prove unreliable in such demanding environments.

HAIBOSENSOR’s high-performance waterproof strain gauges are purpose-built to meet the challenges of railway systems. Featuring durable, hermetically sealed designs, these sensors provide highly precise and stable measurements over time—monitoring track deflection, weld integrity, and structural fatigue—even under harsh conditions such as submersion, ice encasement, or exposure to pollutants.

Waterproof Strain Gauges

Waterproof Strain Gauges for Outdoor and Underwater


.HAIBOSENSOR waterproof strain gauges are encapsulated in a special flexible resin, providing a water-resistant structure suitable for both outdoor and underwater applications when installed with adhesive. The insulation resistance remains stable even after approximately 100 hours of use in water. The flexibility of the resin also allows for easy installation on curved surfaces.

No.

Item

Specification

1

基底材料     Carrier Material

聚酰亚胺Polyimide、酚醛树脂Phenolic

2

教感栅材料   Grid Material

康铜箔Constantan Foil

3

应变计电阻值 Resistance

120Ω、350Ω、1000Ω

4

导线电阻值   Lead Wire Resistance

0.4Ω±10%/m

5

灵敏系数     Gauge Factor

2.0-2.2

6

应用温度范围Working Temp.Range(°℃)

-30-+80℃

7

防水时间     Waterproof Limit

>100h

8

应变极限     Strain Limit

2%

9

绝缘阻抗     Insulation Resistance

>5000MΩ

10

疲劳寿命     Fatigue Life

>10*(变形小于0.1%)

11

适用胶粘剂   Adhesive Selection

EXTRA4000

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Operation Manual

  • This series of strain gauges is designed for high-precision stress analysis. Pay special attention to the following microstructure and procedures to ensure measurement accuracy:
  • The ambient temperature for bonding should be below 25°C, and humidity below 60% RH.
  • Polish the measurement area with 300-grit sandpaper. The polishing pattern should intersect the strain gauge axis at approximately 45 degrees and be perpendicular to it. The polished area must be larger than the footprint of the strain gauge. Finally, clean the area with an organic solvent.
  • Use a brush to apply a thin, uniform layer of adhesive to the back of the strain gauge and the measurement area, brushing in a specific direction. Avoid getting adhesive on the front side of the gauge.
  • Align the strain gauge with the marking lines and press it onto the bonding area. Cover it with a PTFE film and apply firm thumb pressure for one minute. Subsequently, remove the PTFE film.
  • Testing must be conducted within 2 hours after the strain gauge is bonded.
  • Throughout the installation, ensure wires and solder joints are not subjected to significant stress. If necessary, disconnect wires or solder points. Always secure wires firmly.

 

Ready for Demanding Applications?
For reliable, high-precision strain measurement in outdoor, underwater, or challenging environments, HAIBOSENSOR waterproof strain gauges deliver proven performance and stability. Contact HAIBOSENSOR today for a quote or to discuss your specific technical requirements.

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