Thimble Oxygen Sensor

Conical ceramic sensing element

Thimble oxygen sensor also known as the "Conical Lambda Sensor", is a switch-type lambda sensor that detects oxygen contents within the exhaust gas. The ceramic sensing element is pressed formed to conical design, hence "Thimble". It is a traditional and earliest type of oxygen (O2) sensor.

The thimble oxygen sensors function as rich and lean indicators generally come in 1 to 4 wires. With 1 and 2 wires, known as an unheated oxygen sensor, usually located close to the engine room and relies on the surrounding heat to reach operational temperature. With 3 and 4 wires O2 sensor, it integrated heating element, known as a heated oxygen sensor, allowing the sensor to be located downstream after the catalytic converter.

Ceradex's patented single-cell thimble technology enables our sensors to be more resistant to the harsh environment of the engine room and exhaust system. With added specialized protective coating on the ceramic cell surface, resulting in a longer sensing lifespan.

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Product Introduction

Advantage

Premium stainless steel body to protect against extreme temperature and environment
Heat trapping thermal mass maximizing element sensitivity

Available Type	OS1
Sensor Element	ZrO2
Technology	Thimble
Circuitry	Body Ground
Frontal Tube	Spiral Single Layer
Hex Nut	M18
#Wires	1 - 2
Heating	Unheated
Fitting	Universal, Direct Fit
Temperature Range	-40°C ~ 1200°C
Operating Temperature	>400°C

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