Mining YZ series hydraulic pillow / hydraulic pillow, loaded hydraulic pillow, square, circular hydraulic pillow 
 YZ-type hydraulic pillow is released by the Ministry of Coal Industry the "MT/T5016-96 mine ventilation and safety equipment" must-instrument for the determination of the stress state of the tunnel bracket, the surrounding rock, backfill, the product structure is simple, the volume small, light weight, easy operation, the pressure display is intuitive and reliable quality. 
 Mining YZ series hydraulic pillow, roof separation instrument, the amount of board dynamic instrument 
 Main technical parameters: 
 (1) Measuring range :0-60MPa 
 (2) Resolution: 2MPa 
 (3) Accuracy: 1.6% FS