PPB 075 Pressure Pickup Box
The PPB 075 is a small and elegant box for picking up the pressure in a room or hallway. The tube coming from the pressure transmitter, needs to end in the room that you are measuring. And it doesn’t look nice to just leave the tube end hanging, so you put this small box up, and let the tube end in the box. Covered and looking nice. There is plenty of ventilation in the box to let the air/pressure in. And there is already a 8 mm hole for tube to enter the box.
Usually each system and measured room have two of these pressure pickup boxes, one in the room and one in reference space (e.g. hallway).