Vibrating Wire Strain Gauges for Concrete & Steel Structures

Vibrating Wire Strain Gauges

Drift-free, long-term stable strain measurement — CA-BM150 (surface-mount) and CA-NM150 (embedment, cast-in-concrete), with built-in temperature sensor and unique serial ID.

Two Models, One Reliable Principle

Both models use the international, field-proven vibrating wire principle for accurate, long-term automated structural health monitoring — with identical specifications, differing only in mounting method.

Surface Mount

CA-BM150 Surface Strain Gauge

CA-BM150 surface vibrating wire strain gauge
  • Purpose: strain measurement on surfaces of steel & concrete structures
  • Mounting: expansion bolts · chemical/grout anchor · adhesive (short-term)
  • Range: ±1500 με; Accuracy ≤0.1% F.S.; Sensitivity 0.5 με
  • Temp sensor: built-in DS18B20 with unique serial ID
  • Rating: IP68; cable-length independent
Embedment

CA-NM150 Embedment Strain Gauge

CA-NM150 embedment vibrating wire strain gauge
  • Purpose: strain measurement inside concrete & mass concrete
  • Mounting: cast-in-place inside concrete / foundations
  • Range: ±1500 με; Accuracy ≤0.1% F.S.; Sensitivity 0.5 με
  • Temp sensor: built-in DS18B20 with unique serial ID
  • Rating: IP68; cable-length independent

Key Features

  • ✔ Drift-free vibrating wire — excellent long-term stability
  • ✔ Imported alloy steel wire for core sensing
  • ✔ Unique sensor ID — easy data tracking & positioning
  • ✔ No lead-resistance correction for temperature (DS18B20 digital)
  • ✔ 3.0–5.5V single-bus, single-wire powered
  • ✔ Rugged & waterproof IP68, for harsh environments

Technical Specifications

Measurement range±1500 με
Accuracy≤0.1% F.S.
Sensitivity0.5 με
Gauge length150 mm
Temp. sensorDS18B20 with unique serial ID; measurement -20°C ~ 125°C
Operating temperature-20°C ~ +70°C
Enclosure / ratingIP68
Cable4-core shielded; measurement independent of cable length
Mounting (BM150)Expansion bolts · chemical/grout anchor · adhesive (short-term)
Mounting (NM150)Cast-in-place inside concrete / foundations
ℹ️ CA-BM150 (surface) and CA-NM150 (embedment) share identical electrical specifications — choose the model by how it will be installed.

Applications

Strain & stress measurement for construction and infrastructure

Bridges & box girders Subways & tunnels Railways Airports Dams Wharves Mass concrete Building foundations

About Us

Beijing Chengan Technology Co., Ltd. is a leading supplier in infrastructure safety monitoring — a National High-tech Enterprise certified to ISO9001 / ISO14001 / ISO45001, offering R&D, manufacturing, system integration and delivery.

Main lines: bridge health monitoring · slope deformation monitoring · tailings dam online monitoring · reservoir & dam safety · building & structure monitoring · foundation pit automation. Our vision is to become an international, group-style supplier of safety monitoring products and services.

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Contact

Beijing Chengan Technology Co., Ltd.

📧 Email: sales@shmiot.com

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