BGK-4400 Series VW Jointmeters (Crackmeters) are used for measuring structural expansion or contraction in concretes, rocks and earth blocks. The built-in temperature sensor can simultaneously monitor installation site temperature. Internal universal joints allow shearing displacement to some degree. They are made of stainless steel, high in precision and sensitivity and excellent in waterproof performance, anti-corrosion and long-term stability. It achieves frequency and temperature resistance signal transmissions with a special 4-core screened cable.  And the frequency signal is free of cable length influence. They are suitable for long-term monitoring crack changes after being embedded into concrete structures. In addition, Heavy-loading BGK-4400RCC Jointmeter is available and used in rolling concrete structures with a thickening stainless steel shell structure.

Main Specifications: 

Remarks: GK series are imported products.