Differential pressure measurement is a crucial parameter for determining pollutant pathways for IAQ and worker exposure applications. It is also a key HVAC parameter in commercial and institutional buildings and in manufacturing plants, among many other important applications. Each Zephyr II instrument includes a built-in, auto-zeroing micromanometer and K-type thermocouple input for measuring differential pressure, static pressure and temperature.
The auto-zeroing feature allows for highly accurate differential pressure logging over time. With a pitot tube, the Zephyr provides direct air velocity readings and volume flow rate (VFR). Zephyrs may also be fitted with a telescoping 3-function probe (model 2300 AHTS) to measure humidity, temperature and (hotwire) airspeed /VFR. The display and menu system provide step-by-step guides for each operation. This ensures minimal user training is required. Volumetric flow is calculated by simply entering the size of the duct and the instrument performs the necessary calculation. The Zephyr II is a stand-alone instrument. However, with all of its available parameters, it may be interfaced to any GrayWolf DirectSense PPC or LAP mobile PC based system via a CF serial card; opening the door to the full extent of GrayWolf DirectSense product features.
