Vibrating Wire Rebar Strain Gauges

MAS-VWRS series vibrating wire rebar strain gauge is also called steel bar stress meter, which is installed on concrete steel bar to monitor steel bar stress. It is embedded in various concrete engineering structures such as building foundation, continuous wall, tunnel lining, bridge, slope, wharf, dock, gate and so on to measure steel bar stress of concrete internal structure.

Overview

Type VWRS series vibrating wire steel bar meter, also known as rebar strain gauges, is a sensor installed on the concrete stressed steel bar to monitor the stress of the steel bar. Mainly used in geotechnical engineering fields such as bridges, tunnels, buildings, slopes, hydraulic engineering, etc., usually buried in various types of building foundations, diaphragm walls, tunnel linings, bridges, slopes, piers, docks, gates and other concrete engineering structures, Measuring reinforcement or anchor stress in concrete internal structures. The installation adopts butt welding, threaded connection and other installation methods, and the installation of supporting accessories can form a bolt dynamometer, a bedrock stress gauge, etc

The vibrating wire wire rebar strain gauge is mainly composed of coil, steel string and stressed steel body, as shown in the figure below. When stress occurs, the stressed steel body of the vibrating wire wire rebar strain gauge generates strain and transmits it to the steel string, causing the stress of the steel string to change, and the natural frequency changes accordingly. The measuring instrument excites the steel string through the coil and detects the frequency of the signal induced by the coil. After conversion, the vibrating wire load force reinforcement meter of the tested structure is obtained. It is a vibrating wire sensor for measuring the stress of the steel bar or anchor rod, anchor bolt dynamometer and bedrock stress meter can be composed of additional accessories.

Characteristic:

Vibrating wire theory;
Super strong steel wire;
Stainless steel /Alloy steel material;
High stability and precision;
Built-in temperature sensor;
IP68 protection level up to 1MPa;
High sensitivity;

Application scenarios:

Strain measure for foundations, slurry walls, precast piles, caissons, bridge abutments, tunnel liners, buildings, railways, transportation, hydropower, dams, etc.
Steel structure strain measurement;

Specifications

Product Model			MAS-STG-22	MAS-STG-25		MAS-STG-28		MAS-STG-32
Technical parameters	Range	（KN）	0～75	0～105	0～136		0～160
	Measurement accuracy (F.S)		±0.1%
	Working temperature (℃)		-20～ 70
	Temperature measurement accuracy (℃)		±0.5
	Insulation resistance MΩ		≥ 50

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