A-1 Carb or OAT Instrument

A-1 Carb or OAT Instrument


  • Primary Replacement
  • 2 1/4″ Flush Mount
  • Displays Carb or Outside Temperature Readings

SKU: A-1 OAT Category:

Don’t Need Your Glasses To Read

  • Large digital backlit display.

Interpret Your Readings Faster

  • The digital display allows for quick trend analysis.

Budget Friendly

  • Same precision found in the most advanced analyzers on the market, but won’t break the bank.

Accurate, Dependable & Easy To Use

  • LCD sunlight viewable and backlit for night operation.
  • Electronics International consistently has been a leader in digital engine instrumentation since 1979.

A-1 OAT Overview

OAT or Carb Temp

Electronics International’s A-1 instrument provides pilots with the precision and stability needed in order to accurately monitor Outside Air Temperature or Carburetor Temperature while in-flight.

Ice Zone Warning

Not only will Electronics International’s A-1 display Outside Air Temp with a stable, one-degree (Fahrenheit) resolution, it also comes complete with an “Ice Zone” light that alerts the pilot when the Outside Air Temperature could possibly contribute to ice forming in the aircraft carburetor.

Reliable Probes

A-1 OAT Kit Includes:

  • One (1) P-110F Fast Response EGT Probe
  • One (1) P-100 CHT Probe
  • One (1) P-128 OAT/Carb Probe

A Monitor is only as good as its probes. That’s why Electronics International (EI) has taken the development of its probes, connectors, and accessories very seriously. EI has been designing and manufacturing probes for over 30 years. All of our probes have been designed in-house by our engineering team. Our team has studied, tested, and designed temperature probes since the 1970′s. They have written research documents such as The Pilots Manual – Leaning and Diagnosing Engine Problems and Accurate CHT Measurements. Just as a Monitor is only as good as its probes, a probe is only as good as its connector. That’s why EI’s engineering team developed EI’s proprietary OLC-1 connector. The OLC-1 connector greatly increases reliability and reduces installation errors as compared to traditional type connectors. Whether you’re looking for a reliable and accurate CHT, EGT, TIT, or various other probe types, EI has what you need. With more than a half million probes sold and tested you can count on EI’s reliability.

Retail Prices

Package includes:

  • A-1 OAT Instrument
  • P-128 OAT Probe
  • XP-6′ Precision Thermocouple Cable
  • Wire Harness
  • Operating & Installation Instructions
Description Retail Price
A-1 OAT $388


2.5” x 2.5” x 3.65” Deep, 2 1/4” Flush Mount

7 oz. (Unit), 1.6 oz for a probe & 2 oz for a 6′ Cable

Power Requirements
7.5 to 30 Volts, 1/10 Amp

Ice Zone Warning
Light is lit when displayed temperature is between 10’F and 39’F.

Viewable in direct sunlight, with dimmable 12 and 24-volt backlight control lines.

Intensity Control
Separate intensity control lines allow you to independently control Ice Warning Zone and Backlight intensity.

Type K Thermocouple, Ungrounded


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