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TOOLS & INSTRUMENTS

Measuring Instruments

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Measuring instruments in industrial settings are categorized by the physical property they measure, such as length, pressure, or alignment. For professionals working with pneumatic valves, cylinders, and piping, these tools ensure that every component meets strict engineering tolerances.

1. Linear Measuring Instruments

These are used to measure length, diameter, and depth.

  • Vernier / Digital Caliper:

    • Technical Specs: Resolution of 0.01mm; Accuracy ±0.02mm; Range 0–150mm/200mm/300mm.

    • Application: Measuring the inner diameter (ID) and outer diameter (OD) of pipes and pneumatic fittings.

  • External Micrometer:

    • Technical Specs: Resolution of 0.001mm (Micron level); Accuracy ±0.002mm.

    • Application: High-precision thickness measurement of valve stems or machined flange faces.

2. Alignment and Flatness Instruments

These ensure that machinery parts are perfectly level and aligned.

  • Dial Indicator:

    • Technical Specs: Graduation of 0.01mm or 0.001mm; Range 0–10mm.

    • Application: Checking the "run-out" of a rotating shaft or ensuring two flanges are perfectly parallel.

  • Spirit Level / Digital Inclinometer:

    • Technical Specs: Sensitivity of 0.02mm/m to 0.5mm/m.

    • Application: Leveling large industrial machines or horizontal piping runs.

3. Pressure and Flow Measuring Instruments

Essential for monitoring the performance of pneumatic and hydraulic systems.

  • Pressure Gauge:

    • Technical Specs: Accuracy Class 1.0 or 1.6; Dual scale (PSI/Bar); Bourdon tube or Diaphragm type.

    • Application: Monitoring air pressure at the inlet of a solenoid valve or pneumatic cylinder.

  • Digital Manometer:

    • Technical Specs: High precision (±0.3% FSO); Multiple units (kPa, psi, mbar).

    • Application: Measuring differential pressure across filters to check for clogs.

4. Comparison of Precision Levels

Image
Instrument
Measuring Range
Primary Material
Precision / Resolution
Digital Caliper

0–300 mm

Stainless Steel (Hardened)

0.01 mm

Micrometer

0–25 mm (per unit)

Carbide Tipped / Steel

0.001 mm

Dial Indicator

0–10 mm

Brass / Steel internals

0.01 mm

Pressure Gauge

0–16 Bar (Typical)

Stainless Steel / Brass

0.2 Bar

Maintenance Best Practices

  1. Zeroing: Always perform a "zero check" before every measurement to account for thermal expansion or debris.

  2. Calibration: Tools should be calibrated annually against NABL-certified standards (Master Gauges).

  3. Environment: Store precision tools in a temperature-controlled environment; extreme heat can alter the metal's dimensions and affect accuracy.

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