Specification:
Product Name: Crack Monitoring Record
Measuring range: -30 - +30mm
Resolution: 1mm
Measurement accuracy: ±1mm
Ruler size: 100×30 mm
Material: Acrylic
Purpose: Can be used to monitor wall deformation/cracks
Color: As Shown 

Parts List:
3 Pairs of Crack Monitoring Record 12×Screws 3×Monitors

Highlight description:
[Premium Acrylic Material] This crack monitoring record is made of high quality acrylic material, which is sturdy and can be used repeatedly. It is waterproof, sunproof, wear-resistant and scratch-resistant. It is easy to install and intuitive to read. 

[Precision Instrument] Our crack monitor gauge adopts advanced technology, ideal for tracking horizontal and vertical crack motion on flat surfaces. This precision instrument can ensure reliable detection and monitoring of changes in crack width or length over time.

[Purpose] This Crack monitor gauge is designed to monitor cracks in walls and how they evolve over time. The instrument consists of a scale plate and an indicator plate, scale plate (with scales in both horizontal and vertical directions), and indicator plate (one or two crossed indicator lines).

[Widely Uses] Our crack measure and record instrument is widely used for observing the opening and closing of cracks and misalignment on the surface of various buildings. It can also monitor the relative displacement between two points in the horizontal and vertical directions.

Notes:
1.There may be slight differences between the picture and the actual color of the commodity. We will try our best to show you the exact color.
2.Please allow slight dimension difference due to manual measurement.