PoE injectors recommendation?

Hi,

I need a good PoE injector that provides 30 watts of power. It's for a door controller that I don't believe understand lldp nor cdp. But according to the technicien, it does require 25.5 watts to work properly.

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I bought the cheapest PoE injector on CDW: https://www.cdw.ca/product/amer-pig30-poe-injector-30-watt/2634450

This injector is, however, only providing 13 watts according to my testing: https://imgur.com/mes3SHC

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I looked online for a better PoE injector, but it's really hard to separated the good ones for the fake ones. Can you guys help? Thanks