Instruments

Instruments are meters used to monitor the EGT, TIT, or CHT of an internal combustion engine when coupled with a thermocouple. Pilots can increase the life of their engines and enhance safety through the proper monitoring of EGT and CHT.

Alcor instruments are designed to provide temperature compensation for accurate readings year-round, on the ground and at altitude. They are intended for use on single and twin-engine aircraft and calibrated to true temperature. There’s no risk of malfunction during electrical failure as they require no external source of power for operation.

Alcor’s EGT instruments can help pilots save on fuel costs through precision leaning. Alcor EGT instruments also provide a quick visual reference to peak EGT.

Alcor instruments offer the best value in the industry being backed by a 3-year warranty and include all necessary mounting hardware.

Many Alcor instruments can replace existing competitive instruments, as well as old or obsolete part numbers. Like all Alcor products, instruments are designed, hand-made, and supported in the U.S.A.

For specific Instrument applications contact Alcor.

Single EGT/TIT Instruments are intended for single engine aircraft and monitor one cylinder for one type of information:

  • Single instruments are only available in 2 ¼” size. If you have an older 3 1/8” single instrument that needs to be replaced, an instrument reducer plate can be used to fit a 2 ¼” instrument in a 3 1/8” hole.
  • Single EGT or TIT instruments are only available in Type K.
  • True Temp vs. relative to peak EGT: TIT is always in True Temp. EGT comes in both styles and can be selected based on preference. While EGT is really only relevant in reference to Peak EGT, some prefer True Temp.
  • A rotary switch (P/N 80825) can be added to allow for viewing through up to 6 cylinders and a turbocharger. This is a comparatively inexpensive way to create a full engine monitor.
EGT Instruments
TIT Instruments

Dual EGT/TIT Instruments are intended for twin engine aircraft and monitor one cylinder on each engine:

  • Dual instruments are available in both 2 ¼” and 3 1/8” sizes. 2 ¼” instruments do not have reference needles due to a lack of available space.
  • A rotary switch (P/N 80827) can be added to 2 ¼” instruments to allow viewing through up to 6 cylinders and a turbocharger on each engine. This is a comparatively inexpensive way to create a full engine monitor.  The switch only fits 2 ¼” instruments.
  • Dual EGT instruments are available Type E in 3 1/8” or Type K in both sizes.  TIT instruments are available in Type K in both sizes.
  • NOTE: On a dual 2 ¼” instrument, the pilot uses the knob on the side of the appropriate temperature scale to calibrate the needle.

CHT Instruments, Single and Dual – Single instruments are intended for single engine aircraft and monitor one cylinder for one type of information while dual CHT instruments are intended for twin engine aircraft and monitor one cylinder on each engine.

  • Single instruments are only available 2 ¼” size.  If replacing an old 3 1/8” single instrument, an instrument reducer plate can be used to fit a 2 ¼” instrument in a 3 1/8” hole.
    • All Alcor CHT instrument are True Temp and Type J.
    • A rotary switch (P/N 80825) can be added to allow for viewing through up to 6 cylinders and a turbocharger.  This is a comparatively inexpensive way to create a full engine monitor.
  • Dual instrument are available in both 2 ¼” and 3 1/8”. 2 ¼” instrument do not have reference needles due to a lack of available space.
    • A rotary switch (P/N 80827) can be added to 2 ¼” instrument to allow the customer to click through up to 6 cylinders and a turbocharger on each engine.  This is a comparatively inexpensive way to create a full engine monitor.  The switch only fits 2 ¼” instruments.
    • All Alcor CHT instruments are True Temp and Type J.
CHT Instruments

Combination Instruments are intended to measure two types of information on a single engine.

  • Combination instruments are only available in Type K EGT and Type J CHT.  TIT is not available in a combination instrument.
  • Combination instruments are available in both 2 ¼” and 3 1/8”.
  • A rotary switch (P/N 80827) can be added to 2 ¼” instruments to allow for viewing through up to 6 cylinders and a turbocharger on each engine.  This is a comparatively inexpensive way to create a full engine monitor.  The switch only fits 2 ¼” instruments.
Combination Instruments

Q: How long does it take to install an Alcor system?

A: It takes about 2-3 hours labor to install an EGT/CHT system. Less time will be required to just replace a lead or probe.

  • Homebuilders can do it themselves.
  • Certified aircraft need to file a Form 337 if not replacing an existing system or component.

 

Q: What is Alcor’s warranty policy on instruments?

A: Three (3) years from date of manufacture for instruments.

 

EGT/CHT Indicator Installation Rev. I
UCS Indicator Installation Rev. G