Description

This unit has been bench tested by an FAA certified repair station and it comes with an 8130 single release dated 06/03/2026.

• Differential Pressure Sensing: Operates mechanically using an internal diaphragm and a calibrated precision metering screw. It senses the rate of ambient static pressure change from the pitot-static system without requiring electrical power for core needle operation. 
• Linear Rate of Change Resolution: The display needle moves clockwise to indicate a climb and counter-clockwise to indicate a descent, starting from a true 9 o’clock “zero” position. Built-in mechanical stops safely limit needle over-travel at the scale boundaries. 
• Integrated Zero Calibration: Features an external, manual zero-adjustment screw located on the front face bezel at the 7 o’clock position. This allows maintenance or flight crews to easily null the pointer back to zero to compensate for localized atmospheric shifts or aging mechanical drift. 
• Temperature Compensated Internals: Built with internal components engineered to counter thermal expansion and contraction, ensuring steady and reliable vertical speed readings throughout rapid ambient temperature changes during high-altitude climbs or descents.