Donaldson "The Informer" air filter restriction indicators

[z28jimi]

Two, brand new in boxes.
Model #RBX002278
$30 for both.

don_informer__33282.1405344110.480.480.jpg

[Angela]

Never heard of them. What are they and what do they go on?

[z28jimi]

Never heard of them. What are they and what do they go on?

Good questions.
I was convinced I needed them when I was at a DD seminar a couple years ago. They go between the air filter and the engine air intake, and measure/monitor filter restriction.
Sounded like a great idea, but I have Airseps, and there is no place to install these.
Someone with other style air cleaners may have the required 1/4" NPT nipple.
Just putting them out there before they go to the great parts warehouse in the sky.