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QDYLZ100 Stainless Steel Mechanical Pressure Gauge
QDYLZ100 uses a purely mechanical Bourdon tube and gear movement to provide direct on-site pressure indication without external power, signal wiring or electronic components. Its power-free design also eliminates reading drift caused by electromagnetic interference around motors and variable-frequency drives.
QDYLZ100 combines a 304 stainless steel case with a stainless steel pressure path for durable industrial pressure monitoring. The structure supports 120% F.S. continuous overload and 150% F.S. short-duration pressure spikes, while the Bourdon tube is rated for at least 100,000 full-pressure cycles.
The standard 100mm industrial gauge uses radial bottom mounting with a G1/2 process connection. M20×1.5 and NPT1/2 connections and an axial back-mount configuration are also available, allowing the gauge to adapt to different equipment and pipeline layouts.
Working Principle Diagram
Temperature Error Coefficient:≤±0.04% F.S./℃ (deviation from 20℃ reference temperature)
Hysteresis Error:≤0.5% F.S.
Repeatability Error:≤0.3% F.S.
Pointer Stability:Anti-vibration gear movement; dry version with inherent damping, no pointer flutter under normal pipeline vibration
Safe Continuous Overload:120% of full scale; no permanent zero shift or structural deformation
Transient Overload Tolerance:150% of full scale; no damage from short-duration pressure spikes and water hammer
Bourdon Tube Burst Pressure:≥300% of full scale
Bourdon Tube Fatigue Life:≥100,000 full pressure cycles; no leakage or calibration drift under cyclic load
Zero Recovery Performance:≤0.2% F.S. zero offset after full-scale overload release
Movement Backlash:Minimized gear backlash for smooth, steady pointer travel
Dimension Chart