I dont know what this is

[JACK M]

This has been kicking around my collection of stuff that I take to swap meets for years and I have no idea.

I thought it was some kind of tachometer as it says RPM-U/min in 1000.

But it also says cycles per second in hertz.

All the rest looks German I think.

There is a wire that extends from it that advances a calculator of some sort. It says Sirometer on the graph of it.

I guess it would be for sale.

[30DodgePanel]

http://www.treysit.com/16.html

 

you can measure the number of revolutions and frequency of each running engine or operating machine with great accuracy.

[JACK M]

Ha ! I guess I should have tried a google search.

Thanks for this 30.

I wonder where I ever got the thing.

Now that I have looked at the instructions on this link I might have to try it out.

[30DodgePanel]

Let us know your thoughts on how it works if you ever use it...

[JACK M]

It is a little stiff but the link suggests that a drop of light oil might fix that.

I will keep you posted.

[JACK M]

Well, I was tuning up a 383 yesterday that wanted a 500 rpm idle speed.

This thing was all but worthless when I tried to make it work at that speed.

500 is the lowest number at the bottom of the scale so it might have been that.