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AEM 50 PSIa or 3.5 BAR Brass Sensor Kit


AEM 50 PSIa or 3.5 BAR Brass Sensor Kit

Original price was: $91.72.Current price is: $82.55.

This AEM 50 PSIa or 3.5 BAR Brass Sensor Kit is can be used as a standalone sensor to measure engine vacuum/boost up to 33.5psi or as a replacement sensor for some AEM Gauges.

Replacement Sensor for AEM Gauges:
  • 30-0306 – X-Series Boost Gauge -30~35psi
  • 30-4406 – Classic Digital Boost Gauge. -30~35psi
  • 30-5132 – Analog Boost SAE Gauge. -30~35psi
  • 30-5132M – Analog Boost Metric Gauge. -1~2.4Bar

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Absolute (PSIa) Brass Pressure Sensors
AEM offer high quality brass PSIa sensors in 30(2BAR), 50 (3.5BAR) and 75 (5BAR). PSIa is referenced to absolute zero. Absolute zero is the pressure measurement when all the pressure exerted by the atmosphere has been removed. The most common use for absolute pressure sensors is reading manifold pressure. PSIa sensors are required of you wish to measure vacuum. A PSIa sensor will read about 14.7 PSI when the sensing element is exposed to atmospheric pressure at sea level however they can be recalibrated to read zero at atmospheric and a negative number at values less than atmospheric pressure.

Which Pressure Sensor is right for you?

There are many different tools that can be used for measurement, but the degree of accuracy is dependent upon the tool. For example, a ruler can measure distance with a good degree of accuracy, but for a more precise measurement a caliper should be used. The difference between a brass pressure sensor and a stainless steel pressure sensor is similar if we think about it in these terms:

Brass Pressure Sensor = Ruler
Use a Brass Pressure Sensor where you need a good reference to what pressure is being seen.
Example: Brass Pressure Sensor used for a Boost Gauge – Reference/Information for knowing manifold pressure, not for ECU calibration.

Stainless Pressure Sensor = Caliper
Use a SS Pressure Sensor where you need exact details of the pressure.
Example: MAP Sensor information for the ECU – Calibration/crucial information for the ECU.

Quick Specs

  • Stainless-steel sensors accurate to within 1% of full scale (pressure sensors)
  • High-quality sealed sensor housings are virtually impervious to automotive fluids (360-degree welded wetted area)
  • Connector and pins included


  • Boost Pressure: -14.7 – 35.3 PSI
  • Volt Output: 0.5-4.5 vdc


Includes: AEM 50 PSIa or 3.5 BAR Brass Sensor 1/8″ NPT Male Thread, Connector, Pins


Additional Information

Weight .3 lbs
Dimensions 3.8 × 3.5 × 2.2 in


  • Universial

User Manual / Data Sheet

User Manual

Data Sheet