Need assistance finding Vertex part model!!

[SunnyJohn]

Hello, I need assistance on identifying what this part is specifically from the brand Vertex.

I bought a bundle of used equipment and this part came along with it as a freebie.

I would just need the name of the part and the purpose! Thank you so much

 

[Troylee]

It’s a schf meter. It’s used to measure the air draw on your skimmer. I used a Dwyer one a lot when I was building skimmers 15 years ago and it’s a good tool to tune them!

 

[SunnyJohn]

It’s a schf meter. It’s used to measure the air draw on your skimmer. I used a Dwyer one a lot when I was building skimmers 15 years ago and it’s a good tool to tune them!

Is SCHF an acronym? If so, what does it stand for?

 

[Troylee]

Is SCHF an acronym? If so, what does it stand for?

https://www.globaltestsupply.com/pr...3r6QtiXOQphBmXeAAW6xRvyjwABdW1SsOOvGsw4jPwhfH