E-148 Sector-63, Noida, Delhi-NCR, UP, India 201301
  Sales :  +91-7777-876-876 / 0120-4500-800 | Hiring: +91-7290012389

Absolute Pressure Switch Test Rig

About

The Absolute Pressure Switch Test Rig (Part No. 001749000) is a specialized testing system designed to evaluate the performance, accuracy, and durability of an altitude switch used in the IJT-LSP (Intermediate Jet Trainer – Limited Series Production) Project. The altitude switch is a critical aviation component that activates or deactivates an electrical circuit based on atmospheric pressure changes, ensuring proper aircraft functionality at varying altitudes. Overview of the Unit Under Test (UUT) – Altitude Switch
The Absolute Pressure Switch consists of the following key components:
  • Pipe Union: Connects the switch to the pneumatic system.
  • Bellow Assembly: Expands or contracts in response to pressure variations.
  • Adjusting Cap Nut: Regulates the movement of the bellow assembly.
  • Micro Switch: A normally open switch that closes when pressure falls below a set threshold.
  • Electrical Connector: Provides electrical interfacing for signaling and control.
    • Operating Principle:
    1. Pressure is applied to the pipe union. 2. The bellow assembly expands due to pressure changes. 3. The micro switch activates, closing the electrical circuit when the pressure falls below 7600 meters (±150 meters) altitude. 4. The system sends an electrical signal when the threshold is reached.

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    Technical Details

    • DC Power Supply with Test Certificate & calibration Certificate -Input: 230 V +/- 10%, 1 Phase 50 Hz, AC,Output: 0-32 V DC, 2 Amp Rated, Indication for Voltage & Current (3-1/2 Digits)
    • Insulation Tester with Test Certificate & calibration Certificate - Measurement Range: 0-20Gohm, Test Voltage: 500 V DC, 1000 V DC
    • Ammeter with Test Certificate & calibration Certificate - Range 0-2A,accuracy: 0.1%,display 3 1/2 digit, with External Shunt
    • Mating Plug - MIL D 38999/26 FA 35 SN
    • Toggle Switches - DPST
    • Toggle Switches - SPST.
    • Lamp - Green (28VDC)
    • Lamp - Red (28VDC).
    • Electric Items - wires (shielded ptfe), farul, thimbels
    • POT - 0-270 ohm & 10 watt
  • Aviation & Aerospace Industry – Ensures altitude switches in aircraft function reliably at different pressures.
  • Defense & Military Applications – Used in military aircraft projects (e.g., IJT-LSP Project).
  • Flight Safety Systems – Helps verify altitude-dependent switching mechanisms in avionics.
  • Quality Control & R&D – Used by aircraft manufacturers and testing labs to validate altitude-based electrical switching.

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    Key Features

    • Ensures Accurate Altitude Sensing – Tests the altitude switch at precise pressure thresholds.
    • Enhances Aircraft Safety – Prevents electrical failures in altitude-dependent systems.
    • Leak-Proof Verification – Confirms no pressure loss at high altitudes.
    • Real-Time Monitoring – Uses LED indicators and DPI switch to provide instant feedback.

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