Lambda Sensors

Cambiare’s OEM quality range of Lambda Sensors feature the following technology:

5-Wire Wideband
5-wire wideband sensors produce a variable signal (voltage) that tells the ECU how rich or how lean the air-fuel mix is. This is a more precise method of measuring the air-fuel mixture. This delivers greater accuracy to achieve stricter emission targets.

The Zirconia sensor features a hollow ceramic cylinder made from Zirconia Dioxide. At the stoichiometric point the ECU will read a charge of approximately 0.45 volts while a rich fuel mixture will read 0.9 volts and a lean mixture will read 0.1 volts. The sensor is most sensitive near the stoichiometric point and less sensitive when either very lean or very rich. The ECU is able to read this change in voltage and modify the fuel injector output accordingly.

The Titania sensor looks very similar to the Zirconia type, although it is normally smaller. The fundamental difference between the two is that unlike the Zirconia sensor, the Titania type is not able to generate a voltage and requires a base voltage to be supplied by the ECU. The sensor is made from a titanium dioxide ceramic element which changes electrical resistance in response to the concentration of oxygen in the exhaust gas. The ECU measures this signal and adjusts the fuel feed in response. If the fuel mixture is rich, the resistance will measure low. An oxygen rich, or lean mixture, will have a high resistance measure.

Planar sensors use zirconia ceramic sensing technology which is formed into thin flat shape. This is different to standard zirconia sensors as they use a conical sensor shape. Planar sensors require less electrical power as the heater is integrated into the sensing element making them more efficient.