Pyrometer Kit

What Is a Pyrometer Kit?

A pyrometer kit, commonly referred to as an exhaust gas temperature (EGT) gauge kit, is one of the most important diagnostic tools a diesel truck owner can add to their cab. Pyrometer kits consist of a temperature-sensing thermocouple probe, lead wiring, and a dashboard gauge that work together to give drivers real-time visibility into how hard their engine is truly working.

The probe is typically installed in the exhaust manifold, near the cylinder head, where it reads the temperature of exhaust gases exiting the engine during each combustion cycle. That data is then displayed on the gauge inside the cab, giving the driver an immediate and accurate window into engine health.

Why Monitoring Exhaust Gas Temperature Matters

Most diesel trucks and motorhomes leave the factory without any EGT monitoring equipment, yet few conditions are more destructive to a diesel engine than excessive exhaust gas temperatures. Left unchecked, dangerously high EGTs can cause melted pistons, cracked cylinder heads, turbocharger destruction, and complete engine failure — often without any other warning signs presenting first.

Beyond outright failure, abnormal EGT readings can also point to a mismatched air-to-fuel ratio, a clogged air intake, or an overloaded drivetrain — all conditions that silently rob performance and fuel economy long before they cause catastrophic damage. A quality pyrometer kit gives drivers the data they need to make informed decisions: back off throttle, downshift, or pull over before serious damage occurs.

Pyrometer kits are especially valuable for diesel owners who tow heavy loads, run performance tunes, climb long grades, or operate in extreme heat. Turbocharged diesel applications — where the turbocharger itself is directly exposed to exhaust heat — benefit tremendously from continuous EGT monitoring, as sustained high temperatures accelerate wear on turbine wheel vanes and bearings.

What to Look for in a Pyrometer Kit

• Temperature Range: Most street diesel applications are well-covered by a 0–1,500°F gauge, while modified, race, or heavily tuned engines may benefit from higher-range units reaching 2,200°F or beyond.
• Probe Placement: Pre-turbo (turbine inlet) placement in the exhaust manifold is widely regarded as the most accurate location for monitoring peak EGT.
• Thermocouple Type: Type K thermocouples are the industry standard for EGT applications, offering reliable accuracy across the full operating temperature range.
• Lead Wire Length: Consider the distance from the exhaust manifold to the gauge location — motorhome and large truck applications may require significantly longer lead wires than a standard pickup truck.
• Display Type: Analog, digital, and combination analog/digital displays are all available. Choose based on readability and how it integrates with your existing gauge cluster.

Top Brands in Pyrometer Kits

When it comes to EGT monitoring, Banks Power is one of the most respected names in the diesel performance world. With decades of engineering experience in turbo-diesel systems, Banks' DynaFact pyrometer kits are engineered for precision — accurate within 15°F at maximum operating temperatures and built with 2,000°F-rated thermocouple wire for long-term durability and reliable conductivity.