Vacuum pressure switch question
I bought a vacuum pressure switch to try to switch off my vacuum pump. Think I got the wrong range switch. it has 0.1 ~ 1.0MPa adjustment range. Does anyone know the conversion to inches? I can adjust it to shut off, but then it wont come on. I can adjust it to come on, but it won't shut off. I'm thinking to try a different spring in it to change the range. I found a correct range switch, but they want a minimum order of 10 units at $45 per unit. Cant do that. This one was only $20, so if I can't get it to work, I'm not out a lot.
1969 SS 396 X66 - RS Conversion - TKO600 - 3.73 Posi - Paint Code 71-LeMans Blue