[badrich]

Greg: I too was curious just what a Lambda sensor was. Google this for much more detail. Web definitions for Lambda sensor:
An oxygen sensor is an electronic device that measures the proportion of oxygen in the gas being analyzed. The sensing element is usually made with a zirconium ceramic bulb coated on both sides with a thin layer of platinum and comes in both heated and unheated forms. The most common application is to measure the performance of internal combustion engines in automobiles and other vehicles. Divers also use a similar device to measure the level of oxygen they are breathing.
en.wikipedia.org/wiki/Lambda_sensor - Definition in context

I too am interested in beng a part owner of an LM-1 meter. Rich