Which wideband O2 sensors work with the NanoPRO and WB-O2 Nano?

Both support the Bosch LSU 4.2, Bosch LSU 4.9, Bosch LSU 5.2, NTK ZFAS and NTK wideband sensors.

What is the difference between the NanoPRO and the WB-O2 Nano?

Both are wideband controllers. The NanoPRO adds a 2-inch color touchscreen that works as a secondary gauge display and a CAN switch panel.

How many EGT channels can I run?

Each EGT-4 CAN reads 4 Type K thermocouples, and up to 4 modules can be used in one installation for 16 channels.

Can I use the ETM-1 with a non-FuelTech ECU?

The ETM-1 outputs a 0–5 V analog signal, so it works with most data loggers and engine management systems. It only supports ground-isolated sensors.

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FuelTech O2 & EGT Conditioners

FuelTech O2 & EGT Conditioners

FuelTech's wideband and exhaust-temperature modules feed air/fuel ratio and temperature data to the ECU, mostly over CAN, so analog inputs stay free for other sensors.

What's in this collection

O2 Conditioners
O2 Sensors
EGT Conditioners
EGT Thermocouples
Matching harnesses are in FuelTech Unterminated Harnesses

How to choose

Unit	What it does	Key details
NanoPRO	Wideband controller, 2" color touchscreen gauge and switch panel	Up to 5 custom screens; switch functions via CAN
WB-O2 Nano	Wideband controller with display	Logs over CAN; run several for bank-to-bank or per-cylinder O2
EGT-4 CAN	4-channel Type K thermocouple module	Up to 4 modules (16 channels) on one ECU
ETM-1	Single-channel Type K controller	0–5 V analog output; ground-isolated sensors only

The NanoPRO and WB-O2 Nano both support five wideband sensors: Bosch LSU 4.2, 4.9 and 5.2, NTK ZFAS and NTK. Neither ships with a harness or sensor.

Order the harness too. The NanoPRO and WB-O2 Nano ship without a harness or sensor. Pick the harness that matches your sensor (Bosch 4.2, Bosch 4.9 or NTK).

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FuelTech

FuelTech EGT-8 to Dual EGT-4 Adapter Harness

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$119.00

2002008648

FuelTech FuelTech Adapter Harnesses FuelTech O2 & EGT Conditioners FuelTech Wiring Harnesses

An adapter harness that lets you replace a FuelTech EGT-8 module with two EGT-4 modules on the same wiring. Use it to expand or...

FuelTech

FuelTech CHT - Cylinder Head Temperature Thermocouple

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$99.00

5005100388

FuelTech FuelTech EGT Thermocouples FuelTech O2 & EGT Conditioners FuelTech Sensors & Valves FuelTech Temperature Sensors

A Type K thermocouple with a ring tip that bolts to the cylinder head for fast, accurate head temperature readings. The ring has low...

FuelTech

FuelTech Air / Liquid Thermocouple

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$99.00

5005100345

FuelTech FuelTech EGT Thermocouples FuelTech O2 & EGT Conditioners FuelTech Sensors & Valves FuelTech Temperature Sensors

A Type K thermocouple for measuring air or liquid temperature in engines and cooling systems, from intake and intercooler air to coolant and exhaust...

FuelTech

FuelTech WB-O2 Sensor Weld Bung

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$8.00

5011100462

FuelTech FuelTech Adapters & Fittings FuelTech O2 & EGT Conditioners FuelTech O2 Sensors FuelTech Performance Accessories

A stainless steel weld-in bung with the standard M18 x 1.5 oxygen sensor thread. Thread: M18 x 1.5 Material: stainless steel Weld-in installation Related...

FuelTech

FuelTech EGT-4 Connector Kit - Male

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$10.00

5011100570

FuelTech FuelTech Connectors & Plug Kits FuelTech O2 & EGT Conditioners FuelTech Switch Panels & Input Expanders FuelTech Wiring Harnesses

The male connector and terminals for wiring a FuelTech EGT-4 exhaust gas temperature controller into your own harness, giving a secure connection to the...

FuelTech

FuelTech EGT-4 Connector Kit - Female

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$10.00

5011100571

FuelTech FuelTech Connectors & Plug Kits FuelTech O2 & EGT Conditioners FuelTech Switch Panels & Input Expanders FuelTech Wiring Harnesses

The female connector and terminals for wiring a FuelTech EGT-4 into your own harness, whether it is used as an EGT sensor controller or...

FuelTech

FuelTech EGT-4 CAN / SwitchPanel Unterminated Harness

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$29.00

2001006497

FuelTech FuelTech O2 & EGT Conditioners FuelTech Switch Panels & Input Expanders FuelTech Unterminated Harnesses FuelTech Wiring Harnesses

This 6 ft unterminated harness is used to install a FuelTech EGT-4 CAN signal conditioner, SwitchPanel or Input Expander and tie it into the...

FuelTech

FuelTech EGT-4 CAN

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$399.00

3010017631

FuelTech FuelTech EGT Conditioners FuelTech O2 & EGT Conditioners FuelTech Sea-Doo PWC FuelTech Switch Panels & Input Expanders FuelTech Water Sports FuelTech Yamaha PWC

The FuelTech EGT-4 CAN reads up to four type K thermocouples and passes the readings to a FuelTech ECU over the CAN bus. Besides...

FuelTech

FuelTech EGT Thread In 1/8" NPT Bung

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$15.00

5005100393

FuelTech FuelTech Adapters & Fittings FuelTech EGT Thermocouples FuelTech O2 & EGT Conditioners FuelTech Performance Accessories

A screw-in bung with a 1/8 NPT thread for installing a 1/4" thermocouple. 1/8 NPT thread Accepts a 1/4" thermocouple Threads in, no welding...

FuelTech

FuelTech NanoPRO Wideband O2 Sensor Controller to Bosch LSU 4.9 Sensor Wiring Harness

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$69.00

2001010315

FuelTech FuelTech O2 & EGT Conditioners FuelTech Unterminated Harnesses FuelTech Wiring Harnesses

The wiring harness that connects a FuelTech NanoPRO wideband controller to a Bosch LSU 4.9 O2 sensor. It is offered in a 6.5 ft...

FuelTech

FuelTech Nano & NanoPRO LSU4.2 Harness

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$69.00

2001003625

FuelTech FuelTech O2 & EGT Conditioners FuelTech Unterminated Harnesses FuelTech Wiring Harnesses

This harness connects a FuelTech wideband O2 controller to a Bosch LSU4.2 sensor. It fits the new WB-O2 Nano, the original WB-O2 Nano (V1)...

FuelTech

FuelTech EGT Compression Fitting - Weld Bung

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$13.00

5011100435

FuelTech FuelTech Adapters & Fittings FuelTech EGT Thermocouples FuelTech O2 & EGT Conditioners FuelTech Performance Accessories

A weld-in bung with a compression fitting that holds an exhaust gas temperature probe securely in the exhaust. Weld-in bung for EGT probes Compression...

FuelTech

FuelTech NTK WB-O2 Sensor Plug Kit

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$13.00

5011100296

FuelTech FuelTech Connectors & Plug Kits FuelTech O2 & EGT Conditioners FuelTech Sensors & Valves FuelTech Wiring Harnesses

The NTK WB-O2 Sensor Plug Kit connects an NTK wideband oxygen sensor to your wiring harness and engine management system for tuning and air-fuel...

FuelTech

FuelTech Type K Miniature Thermocouple Connector

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$7.00

5005100032

FuelTech FuelTech Connectors & Plug Kits FuelTech O2 & EGT Conditioners FuelTech Sensors & Valves FuelTech Wiring Harnesses

A Type K miniature thermocouple connector in the 2-pin flat mini format. It connects thermocouple temperature probes to a FuelTech EGT-8 CAN or EGT-4...

FuelTech

FuelTech WB-O2 Sensor Plug

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$10.00

5011100776

FuelTech FuelTech O2 & EGT Conditioners FuelTech O2 Sensors

A stainless steel plug that threads into a standard oxygen sensor bung to seal it when no sensor is installed. Thread: M18 x 1.5...

FuelTech

FuelTech WB-O2 Sensor Bosch to NTK Adapter Harness

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$89.00

2002100035

FuelTech FuelTech Adapter Harnesses FuelTech O2 & EGT Conditioners FuelTech Wiring Harnesses

This short adapter harness converts a female Bosch O2 connector to a male NTK sensor connector. It lets you run an NTK lab-grade wideband...

FuelTech

FuelTech WB-O2 Nano

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$199.00

3010014744

FuelTech FuelTech O2 & EGT Conditioners FuelTech O2 Conditioners

The FuelTech WB-O2 Nano is a compact wideband O2 controller with a built-in display. It runs five different wideband sensors and sends its data...

FuelTech

FuelTech WB-O2 - O2 Sensor - Alcohol

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$699.00

5005100011

FuelTech FuelTech O2 & EGT Conditioners FuelTech O2 Sensors

The FuelTech WB-O2 Alcohol is a wideband oxygen sensor built around a precision NTK element for high-horsepower alcohol fuel mixtures, where accurate readings at...

FuelTech

FuelTech Alcohol O2 - Dual Channel Harness

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$189.00

2001003289

FuelTech FuelTech O2 & EGT Conditioners FuelTech Unterminated Harnesses FuelTech Wiring Harnesses

The wiring harness for FuelTech's dual channel Alcohol O2 conditioner. It comes pre-wired for two O2 sensors, with the vehicle side left unterminated for...

FuelTech

FuelTech 4x WB-O2 Nano Harness

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$219.00

2001006093

FuelTech FuelTech O2 & EGT Conditioners FuelTech Unterminated Harnesses FuelTech Wiring Harnesses

This harness ties up to four FuelTech WB-O2 Nano wideband controllers into one tidy installation. It is built for setups running one O2 sensor...

FuelTech

FuelTech Type K Thermocouple EGT Probe - Exposed Tip

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$99.00

5005100335

FuelTech FuelTech EGT Thermocouples FuelTech O2 & EGT Conditioners FuelTech Sensors & Valves FuelTech Temperature Sensors

This FuelTech Type K EGT probe uses an exposed tip, which gives the sensing element less thermal mass and lets it respond faster when...

FuelTech

FuelTech NanoPRO Wideband O2 Sensor Controller

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$349.00

3010009597

FuelTech FuelTech Kawasaki PWC FuelTech O2 & EGT Conditioners FuelTech O2 Conditioners FuelTech Sea-Doo PWC FuelTech Water Sports FuelTech Yamaha PWC

The FuelTech NanoPRO combines three jobs in one small unit: wideband O2 sensor controller, secondary dash display and touchscreen switch panel. It runs five...

FuelTech

FuelTech NanoPRO to OBD2 Adapter Harness

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$49.00

2002012793

FuelTech FuelTech Adapter Harnesses FuelTech O2 & EGT Conditioners FuelTech Wiring Harnesses

This harness connects a FuelTech NanoPRO to a vehicle's OBD2 port so the NanoPRO can work as a display for real-time data from the...

FuelTech

FuelTech ETM-1 Type K Thermocouple Controller

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$109.00

3010002630

FuelTech FuelTech EGT Conditioners FuelTech O2 & EGT Conditioners

The FuelTech ETM-1 converts the signal from a single Type K thermocouple into a clean 0-5V analog output that an ECU or data logger...

FuelTech

FuelTech Bosch 4.9 WB-O2 Sensor Plug Kit

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$13.00

5005100584

FuelTech FuelTech Connectors & Plug Kits FuelTech O2 & EGT Conditioners FuelTech Sensors & Valves FuelTech Wiring Harnesses

The Bosch 4.9 WB-O2 Sensor Plug Kit is the harness-side plug for a Bosch 4.9 wideband oxygen sensor. Use it to build or repair...

FuelTech

FuelTech Bosch 4.2 WB-O2 Sensor Connector Kit - Male

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$13.00

5005100216

FuelTech FuelTech Connectors & Plug Kits FuelTech O2 & EGT Conditioners FuelTech Sensors & Valves FuelTech Wiring Harnesses

This is the male-side connector kit for a Bosch 4.2 wideband oxygen sensor. It lets you terminate your harness so the sensor plugs straight...

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FuelTech EGT-8 to Dual EGT-4 Adapter Harness

FuelTech CHT - Cylinder Head Temperature Thermocouple

FuelTech Air / Liquid Thermocouple

FuelTech WB-O2 Sensor Weld Bung

FuelTech EGT-4 Connector Kit - Male

FuelTech EGT-4 Connector Kit - Female

FuelTech EGT-4 CAN / SwitchPanel Unterminated Harness

FuelTech EGT-4 CAN

FuelTech EGT Thread In 1/8" NPT Bung

FuelTech NanoPRO Wideband O2 Sensor Controller to Bosch LSU 4.9 Sensor Wiring Harness

FuelTech Nano & NanoPRO LSU4.2 Harness

FuelTech EGT Compression Fitting - Weld Bung

FuelTech NTK WB-O2 Sensor Plug Kit

FuelTech Type K Miniature Thermocouple Connector

FuelTech WB-O2 Sensor Plug

FuelTech WB-O2 Sensor Bosch to NTK Adapter Harness

FuelTech WB-O2 Nano

FuelTech WB-O2 - O2 Sensor - Alcohol

FuelTech Alcohol O2 - Dual Channel Harness

FuelTech 4x WB-O2 Nano Harness

FuelTech Type K Thermocouple EGT Probe - Exposed Tip

FuelTech NanoPRO Wideband O2 Sensor Controller

FuelTech NanoPRO to OBD2 Adapter Harness

FuelTech ETM-1 Type K Thermocouple Controller

FuelTech Bosch 4.9 WB-O2 Sensor Plug Kit

FuelTech Bosch 4.2 WB-O2 Sensor Connector Kit - Male

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