Device name ：Non-contact apparatus for autogenous strain of concrete in a corrugated PE-tube
Model：YC-TBWSD 
Origin：Beijing
Purpose：To measure automatically the autogenous strain of concrete.

该产品参照美国标准ASTM C1698和《普通混凝土长期性能和耐久性能试验方法标准》GB/T5082研制，主要部件包括刚性支架、电涡流位移传感器、触摸屏采集主机、温湿度传感器、专用塞子和波纹管，可将试样的体积变形转化为线性变形，能够避免试样在测试过程中出现水分散失，主要用于自动测量混凝土的自收缩和膨胀的变化情况。
骨料最大粒径：19mm

The product is developed according to ASTM C1698 and is superior to the standard requirement. The main components include three dilatometer benches, a reference bar, three length measuring gauges and some corrugated plastic tubes. The volume deformation of the sample can be transformed into linear deformation, which can avoid water loss in the test process. It is mainly used to automatically measure the autogenous strain of concrete and mortar.
Maximum aggregate size：19mm