OVERVIEW
Top Seller!
• EGT-DP series
• Probe diameter 3/16 inch (0.187 inch)
• Enclosed Tip Sensing Junction (Foul Proof)
• Response time constant: 1200 milliseconds
• Includes 316 SS adjustable compression fitting
• Applications: Motor Sports, Marine, Aviation, Power Gen, Research & Development, Alternative Energy, Military
(Recommended for fuel types: Diesel, Biodiesel, CNG & LNG)
MADE IN THE USA
The Bio Diesel Exhaust Gas Temperature Sensor is specifically designed for use in Internal Combustion Engines operating on Diesel & Biodiesel or any system using a sulfuric or exhaust systems that are prone to fouling exposed junction EGT probes. This probe has been designed to withstand the rigors of marine and over the road trucking. It will also withstand the rigors of racing, tuning, and testing applications.
Made in the USA from superior materials, designed to withstand highly corrosive saltwater environments and even the most extreme racing conditions. The foul-proof sensing tip is recommended for EGT temperature measurements of sulfuric fuels such as diesel or bio diesel mixtures.
The Exhaust Gas Temperature Probe is capable of surviving extreme vibration and heat up to 2300°F (1300°C). The EGT probe will fit most diesel engine exhaust systems from approximately .750 inch diameter up to about 4 inch diameter with nominal installation modifications. The EGT probe is 0.187" diameter (4.75 mm) with a 90-degree bend to accommodate tight mounting locations. An adjustable (316 Stainless Steel) 1/8" NPT compression fitting adapter is included. The EGT probe cable lead length is 6 feet (1.8 meters).
The probe cable is over-braided in stainless steel for heavy-duty abrasion resistance. The signal wires are FEP insulated. Designed to deliver high performance, high temperature measurements, reliably and consistently in the most extreme operating conditions.
The high temperature sensors of choice for professional racing teams, R&D test labs, and Enthusiasts. The EGT probes can be used for many different applications, including… but not limited to DHRA, Drag Racing, Diesel Sled Pulling, Road Courses, Tow Vehicles and Engine Management.
In stock and available for immediate shipment. We ship worldwide.
IMPORTANT NOTE: Please confirm with your instrument manufacturer that the instrument is compatible with a Type K thermocouple sensor.
We Ship World Wide! Europe, Asia, Australia, South America - Wherever you are, we'll ship to you.
Options:
TECHNICAL SPECIFICATIONS
Thermocouple type: | Type K |
Sensing Junction: | Enclosed Ungrounded |
Temperature Range: | -148°F to 2372°F (-100°C to 1300°C) |
Accuracy: | +/-0.4% of reading or about +/- 1.1°C (Special Limits of Error) |
Probe Diameter: | 3/16 inch (0.187 inch) (4.75 mm) |
Response Time: | 150 milliseconds |
Max Tip Insertion Depth: | 1.1 inch (27.94 mm) |
Outer Sheath Material: | Inconel 600 protective sheathing |
Cable: | Stainless steel over-braid cable with FEP insulated conductors; 6, 12 or 25 foot |
Included Compression Fitting: | 316 stainless steel, adjustable, 1/8 inch –27 NPT male thread |
DOCUMENTS & DOWNLOADS
VIDEOS
RELATED PRODUCTS
About - EGT-DP Diesel Probe — 90° Bent, 3/16" Diameter
Commercial and Industrial Duty Exhaust Temperature Sensor
The EGT-DP 90° probe is a Type K thermocouple with an enclosed, ungrounded junction and a 90° bend at the sheath tip, allowing the cable to exit parallel to the exhaust pipe surface rather than perpendicular to it.
It is designed for diesel, biodiesel, CNG, and LNG applications where installation space is limited and long-term durability is required. A 316 stainless steel adjustable compression fitting is included.
Why the 90° Bend Exists
In many diesel and performance applications, exhaust manifolds and piping are located in tight spaces near:
- Firewalls
- Frame rails
- Turbochargers
A straight probe extends outward from the pipe, requiring clearance that may not be available.
The 90° design allows:
- Standard perpendicular insertion into the exhaust stream
- Cable exit parallel to the pipe surface
This reduces the installed footprint and enables placement at the optimal measurement location.
Choosing Between 90° and Straight Probes
Feature |
| 90° Bent | 4" Straight |
|---|---|---|---|
Max insertion |
| 1.1" | 2.8" |
Pipe size |
| ~3/4" to ~2" ID | ~3/4" to ~4" ID |
Clearance |
| Low-profile | Requires axial clearance |
Best use |
| Tight engine bays | Large exhaust systems |
The 90° design prioritizes installation clearance, while straight probes allow deeper insertion for larger pipes.
Enclosed Ungrounded Junction
The probe uses an enclosed, ungrounded junction .
This design:
- Prevents direct exposure of the thermocouple junction to exhaust gases
- Reduces corrosion from sulfur compounds and condensates
- Improves long-term measurement stability
Ungrounded construction also isolates the sensor electrically, reducing ground loop errors.
Materials and Construction
- Sheath: Inconel 600
- Insulation: MgO
- Cable: Stainless overbraid with Teflon-insulated conductors, 20 AWG
- Fitting: 316 stainless steel compression fitting
The 3/16" diameter improves mechanical durability and vibration resistance.
Response Time
- 1200 ms (time constant)
Response time is defined as the time required to reach 63.2% of a step temperature change.
This response speed is appropriate for diesel and industrial applications where temperature changes occur gradually.
Probe Specifications
- Type: Type K thermocouple
- Range: -148 to 2372°F
- Accuracy: ±0.4% of reading
- Diameter: 3/16" (0.187")
- Max insertion: 1.1"
Wiring
Type K polarity must be maintained:
- Yellow = Positive (+)
- Red = Negative (–)
Installation Overview
Probe Location
- Pre-turbo preferred
- Post-turbo acceptable
Insertion Depth
Do not exceed 1.1" insertion depth to avoid mechanical stress.
Mounting
- Weld bung recommended
- Drill-and-tap only if wall thickness allows
Cable Routing
- Avoid direct exhaust contact
- Secure cable at intervals
- Use thermocouple extension wire if needed
Applications
- Diesel performance vehicles
- Commercial trucks
- Marine diesel engines
- Industrial equipment
- CNG and LNG systems
Summary
The EGT-DP 90° probe is designed for accurate, durable temperature measurement in compact installations.
- Low-profile 90° geometry
- Enclosed junction for long service life
- Rugged construction for demanding environments
Aircraft Installation Notice
For experimental and non-certified aircraft use only.