Outside Reference Pressure Measurement
Today’s high-performance buildings require accurate and reliable measurement of outdoor static air pressure as part of a system to monitor and maintain proper airflow. The Air Monitor’s Static Outside Air Probe (S.O.A.P.) can be an integral component of a system for improving indoor air quality (IAQ), occupant comfort and safety, and energy efficiency, as well as ensuring harmful gases and particles are contained by maintaining a negative pressure relative to the surrounding space.
Air Monitor Solutions Can Provide
Sensing Accuracy within 1%
Air Monitor’s Static Outside Air Probe provides gauge reference outside atmospheric air pressure readings to within 1% of the actual flow.Unaffected by Winds up to 40 MPH
A unique circular parallel plate design maintains atmospheric pressure sensing accuracy regardless of flow (wind) direction or pattern.Outside Reference Pressure Accuracy through Rain or Snow
Operation of the perforated 316 stainless steel probe is not affected or impaired by heavy moisture from rain or snow.More About Outside Reference Pressure Measurement
For the accurate measurement and/or control of room, laboratory, space, or building pressurization, it is essential that sensed pressure levels in airflow systems be referenced to a common gauge reference pressure. Ideally, that reference is the outside static air pressure.The usual outdoor sensor, because of its design, has to be shielded from the wind and often ends up located where it will be subjected to the pressure envelope developed by the wind’s effect upon the building. In contrast, Air Monitor’s S.O.A.P. pressure readings are not affected by wind velocities up to 40 miles per hour.
To optimize the performance of the S.O.A.P., it must be located away from all structures and obstacles of sufficient size that could create a wind-induced pressure envelope. Typical locations are on an elevated position in an outdoor parking lot, a below-ground recess (landscaped or lawn area) away from buildings, a below-ground location like a parking garage with non-forced ventilation, or on a rooftop mounted pole sufficiently elevated to be outside any anticipated pressure envelope.
S.A.P. – Static Air Probe
The Air Monitor S.A.P. family of static air probes is designed for room or space pressurization applications where it is essential that the static pressure level within a room or space, and that of a reference pressure (corridor, adjacent space, outdoor location, etc.), be accurately sensed, free of pulsations or effects of air movement in the vicinity of the sensing probe(s).
It can also be utilized to sense the static pressure within fan inlet and discharge plenums or large ducts, where the presence of multi-directional and turbulent airflows prohibit the use of flow sensitive static pressure tips or probes.
VELTRON DPT 2500-plus Transmitter
The VELTRON DPT 2500-plus transmitter has an automatic zeroing circuit capable of electronically adjusting the transmitter zero at predetermined time intervals while simultaneously holding the transmitter output signal.
The automatic zeroing circuit eliminates output signal drift due to thermal, electronic, or mechanical effects, as well as the need for initial or periodic transmitter zeroing. In a moderately steady temperature location, this automatic zeroing function produces a “self-calibrating” transmitter.
S.O.A.P – Static Outdoor Air Pressure Sensor
The S.O.A.P Static Outside Air Probe was designed for accurate and instantaneous sensing of outside static air pressure levels without being adversely impaired by the presence of directionalized gusting wind.
The circular shape of the S.O.A.P. presents a 360° radial entrance for the flow of air (wind) through the sensor. The perforations located on the entering air edges of the parallel plates act as a means of diffusing the entering airflow to minimize the effect of non-horizontal flow on the sensor performance.
The combined action of its unique design features permits the S.O.A.P. to sense the outside atmospheric pressure to within 1% of the actual valve.
