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Home » All Blogs

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Please explain the difference between Type K & Type J thermocouple CHT (Cylinder Head Temperature) sending units?

The primary differences between the two thermocouples are:

Measuring Range...
Type K = -330°F to +2460°F (-200°C to +1250°C)
Type J = -40°F to +1382°F (-40°C to +750°C)

Sensitivity...
Type K = approximately 41 µV/°C
Type J = approximately 55 µV/°C

If you already own a gauge it is important that you use the correct thermocouple sensor type, otherwise the result will be incorrect CHT temperature readings due to mismatched sensitivities.

Type J & Type K Thermocouple US ANSI Color Codes
  • neillm's blog
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Not inserting the EGT Probe tip completely into the center of the exhaust stream can result in low EGT temperature readings.

Not inserting the EGT Probe tip completely into the center of the exhaust stream can result in low EGT temperature readings.

After installing our Marine Series EGT Digital Pyrometer Kit on their boat a customer called to ask why their EGT temperature readings were hundreds of degrees below expected. They were reading 157 °F@ idle, 184 °F @ 1000 rpm, and 213 °F @ 1500 rpm.

Not inserting the EGT Probe tip completely into the center of the exhaust stream
  • neillm's blog
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Explain 1/8" NPT Male Thread

A common question from our customers is how a 3/16" or 1/4" OD temperature probe can be used with an 1/8" NPT thread male compression fitting . Isn't a temperature probe with 3/16" or 1/4" OD too large for a compression fitting with 1/8" NPT male thread?

  • neillm's blog
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EGT Probe Comparison Chart

Recommended for fuel types: Gasoline, Natural gas, Nitrous oxide, & Alcohols

  • neillm's blog
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I want to drill & tap a hole in the manifold & thread in the Compression Fitting. What tools will I need?

We recently created an NPT Compression Fitting Technical Guide.

The guide includes detailed information about the compression fitting dimensions, threads, ratings, assembly, and installation.

You can download it from here:

  • neillm's blog
  • Read more

Be sure to properly tie down the EGT probe cable to avoid wire fatigue at cable to sheath junction

Be sure to properly tie down the EGT probe cable to avoid wire fatigue at cable to sheath junction

Proper Tie Down of EGT Probe Cable
  • neillm's blog
  • Read more

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