This case is part of a DIY custom aquarium controller, it could also be used for aquaponics.
My setup consists of a Raspberry Pi 3, Whitebox T3 (rev 1) Pi Hat & 3 Atlas Scientific EZO stamps (pH Circuit, Conductivity Circuit & Temperature Circuit).
Should also work with the Whitebox T3 (rev 2).
Credit: Big thanks to @talking_Umbr_2226274 for help with testing alignment for new Pi4 compatible version.
The author marked this model as their own original creation.