• Dampens & stabilizes barometric reference pressures in order to allow accurate low pressure measurements
• “Static Bottle” for small systems
• “Static Basket” for large multiple pressure systems

Application
It is very difficult to make accurate low pressure measurements  (5 inches of H20 to 15 psig) without taking barometric pressure into consideration. Barometric pressure is not constant. It is a function of atmospheric conditions. Normal Barometric pressure will normally change very slowly in the course of a day.  However, barometric pressure inside a facility can change quickly when an HVAC system cycles on or off, when a door opens or closes, or a fan turns on or off. Barometric pressure has a large effect on low pressure differential measurements.
The solution for accurate low pressure measurements is to take control of the reference side of the pressure sensor or pressure scanner. There are several things the user can do to control and minimize Barometric changes. The first thing is to place the pressure scanner or pressure transducer in a pneumatically benign location that is not near a fan, room doors, or air conditioning systems. A good solution would be to connect the reference input to a static basket, or static bottle, to minimize the potential for measurement errors. This bottle should be mounted somewhere accessible to the reference side of the pressure sensor, or pressure scanner. The end result is a quiet barometric immune to small changes in the room ambient.
For larger facilities where many pressure measurements are made and multiple static lines may be used, a static basket may be the preferred choice. Scanivalve Corp offers a pressure static basket.