Sigma-Tek 3-1/8 Airspeed Indicator 40-300Mph 40-200Knt

The Sigma-Tek EA5172 is an analogue airspeed indicator in a nominal 3-1/8 in (approximately 79 mm) instrument format. It provides a dual-scale dial in MPH and knots, with the supplied product data identifying a 40–200 knot scale.

Sigma-Tek standard airspeed indicators use an unrestrained movement actuated by ram air and ambient atmospheric pressure from the aircraft pitot and static pressure systems. A moveable pointer works against a fixed dial, with the zero index located at the 12 o’clock position. Internal temperature compensation is provided; there is no external zero adjustment, and pointer damping is internally adjustable.

• Manufacturer part number: EA5172
• Nominal instrument size: 3-1/8 in (approximately 79 mm)
• Dial units: MPH and knots
• Knots range stated in supplied data: 40–200 knots
• Pitot/static pressure operation
• Unrestrained movement

Please verify the exact dial markings, range, configuration and suitability against the installed instrument and approved maintenance data before purchase or installation. The supplied product title and source specification table differ on the MPH upper limit.