Not long ago we explained why every performance tuner needs an electronic wideband air/fuel meter. You have a choice in selecting which wideband is right for you, and among those choices is an offering from APSX WIDEBAND; its D2 Wideband Controller Gauges feature an anti-glare face and on-gauge menu control among other advantages, and APSX reports its unit provides highly accurate data logging as well. The D2 comes in the same plastic enclosure as APSX’s B2 Digital Boost Gauge so you can maintain a similar look, and the D2 kit is competitively priced.
Faceplate improvements include an indestructible polycarbonate material and anti-glare coating. Eliminating the clear lens in front of the faceplate and adding anti-glare coating on the much thicker faceplate avoids daylight glare. Faceplates come in either black or white. APSX WIDEBAND D2 gauges also have five color options for the main LED display: red, blue, white, green or orange. The sweeping small LED lights with red, orange and green colors resemble the classic “needle” look for quick feedback.
The button at the back of the gauge allows users to change menu settings. The min/max thresholds for narrowband, analog limits, and fuel type can be programmed without a computer. A 0-5-volt analog output is provided for data loggers and engine management systems; digital output is also possible by using APSX WIDEBAND software on your computer.
For more on the D2 Wideband Controller Gauge Kit and other APSX WIDEBAND products, head to or give them a call at (513) 602-9730.