YB-201/YB-251 precision pressure gauges are mainly used to calibrate industrial ordinary pressure gauges and other instruments with pressure parameters; It can also be used for precise measurement of pressure in non corrosive media.

technical indicators
Accuracy level: 0.25
Measurement range: (MPa)

0~0.1； 0~0.16； 0~0.25； 0～0.4； 0~0.6；
0~1； 0~1.6； 0~2.5； 0~4； 0-6.

Note: Specifications below 0.25MPa are only suitable for measuring gas pressure
Environmental conditions for use: 0~40 ℃, relative humidity not exceeding 80%, and can also be used under any constant temperature condition of -30~50 ℃.
Temperature influence: When the ambient temperature deviates from 20 ± 2 ℃, the error change shall not exceed 0.25%/10 ℃.  

structural principle
The instrument consists of a measuring system, an indicating part, and a case part.  
Measurement system - composed of joints, spring tubes, and gear transmission mechanisms. Under the pressure of the measured medium, the end (free end) of the spring tube is correspondingly displaced, and the connecting rod group drives the sector gear in the gear transmission mechanism to produce angular displacement, thereby causing the gear shaft to deflect and transmit it to the indicator part.  
Indicating part - composed of indexing disc, mirror surface (YB-201 type without mirror surface), pointer, etc. The deflection value of the gear shaft is correspondingly indicated on the indexing plate by the pointer, indicating the pressure value of the measured medium.  
Case section - composed of a watch cover, glass, and case. The lower end of the watch cover is equipped with a zero adjustment device for adjusting the zero position

Dimensions Unit (mm)

YB-201/YB-251 Precision Pressure Gauge Model Representation