Exhaust Gas Analyzers

[bunnspecial]

I'm always a sucker for vintage tune-up tools, and one carb tuning guide I've recently come across(published by SU) gives instructions in the form of a CO meter, or as best as I can tell what was sold as an exhaust gas analyzer here.

Looking a bit around Ebay, I've found 70s era meters made by Heathkit and ASI. They seem to sell for similar prices for similarly complete ones, so that's not really a factor.

Does anyone have experience with these? If so, can anyone recommend one over the other, or possibly an alternate brand? I bought a Penske branded tach-dwell, or really an automotive multimeter, from a member here back in the spring, and it's been a dream to use.

 

[AutoMechanic]

I have seen them before but never used them. I’ve use tach and dwell meters though.

 

[Motu]

We started using the 2 gas analogue (CO and HC) for CNG and LPG in the '80's, and had to go into low range for gas...getting it down to 1.5 % CO - WOW ! By the '90's they wouldn't even register with modern vehicles and we had a 4 gas digital on our SUN MEA. And then....they were obsolete, carbs were gone, and so was adjustment. They were good for a diagnostic tool, but that's a lot of money (for us) for something you hardly need.

The SU is a dirty carb (no emulsion tube) and is going to be around 4.5 % CO at idle....you'll be able to smell the HC content. I still have a 2 gas under my bench, it is 12 volt, so you could take it on a drive...and it took up the whole passenger seat. Needs repair, and not just worth it...if there are any parts available, and there weren't last time I tried.

 

[Trav]

A few years ago I could have bought as many of these things as I wanted for next to nothing. The emission program went from dyno and exhaust gas analyzers to OBD2, most of the drive on dyno's got scrapped and many analyzers got sold.
I cant justify the space for it for the use it would get.

 

[bunnspecial]

Thanks for the responses guys, but I'm not asking necessarily about the "big" dyno type ones or similar.

Rather, I seem to find several on Ebay that seem to be geared more toward small shop or advanced home mechanic. This is one such unit

https://www.ebay.com/p/1324454497