AFR gauge

[djchickcrx]

Hi all,

Considering putting an Air:fuel ratio gauge into my crx. Seeing as the car isnt selling, Id like to possibly get the carbs tuned up so it runs as economically as possible.
Not sure I fully understand the concept, so have a few questions;

The AFR gauge, which reads lean, stoich or rich, is basically an o2 sensor. The O2 sensor itself is also called a lambda sensor? This screws in somewhere along the exhaust. Is the above correct? Is it also called a wideband sensor, or is this something different.

If so, can anyone recommend a standlaone unit, with o2 sensor, for reasonable money? Ive seen some of the stuff on ebay, but its expensive. There are cheaper gauges, that only come with a wiring loom. Would it be possible to wire this into the 1.5x d15b engine, or would those be only suitable for a car with obd1 or similar.

Any info would be of great use lads.