The WMS Wideband O2 System is a compact digital instrument capable of accurately measuring air/fuel ratio (AFR), allowing you to monitor your engine and tune it for optimal power and reliability. Leading-edge Bosch technology is used, including a Bosch LSU 4.2 sensor and Bosch calibration chip. Together they provide AFR measuring from 9.65:1 to 20:1 with a 1% accuracy.

This all-in-one control box with LED display is very easy to read and provides real-time monitoring. For tuning, you can log air/fuel ratio and RPMs, viewing it on a laptop with the included software and cable. The WMS Wideband O2 System offers tuners the most complete, accurate and compact air/fuel analysis tool on the market today, and it can be had for $399 USD / $519 CDN.

Order the WMS Wideband O2 System   

We also offer our Wideband System with the Bosch LSU4 Motorsport sensor used by many top race teams worldwide. This sensor is designed for race applications and may be more effective with race gas.

WMS Wideband System with Motorsport Sensor $479.00 USD / $599.00 CDN

Display Comparison

Take a look at the displays available below and see if you can read the values. The displays are represented in sizes proportional to each other.

If you want to see the values your Wideband O2 Sensor, then only the WMS display will do, even though it is only 2.4" x 1.5".
The Dynojet Commander 2"  gauge looks good, but it is small and analog, which makes it difficult to read.
Even though the Innovate LM-1 controller is huge (~ 7" x 5"), and the WMS controller is small, the Innovate display is impossible to read. The WMS display, by contrast, is easy to read.

Order the WMS Wideband O2 System