Differential pressure (∆P) 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, for validating system balance, including testing pressure drop across various components, verifying filter performance and many other important applications. Each Zephyr instrument includes a built-in, auto-zeroing micro-manometer for measuring differential pressure and static pressure. 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) over a wide range. There is also a ‘K’-type thermocouple input for a variety of temperature probes (air/surface/penetration/etc.). Zephyrs may also be fitted with a telescoping 3-function probe (model 2300-AHTS-CL) to measure humidity, (Pt-100 RTD) temperature and (hotwire) airspeed/VFR.

Features:

• Tried and true, rugged design
• Multiple parameter: Measure Differential Pressure alone, together w/ a K-type thermocouple temperature probe, with a 2300AHTS %RH/Temperature/Airspeed combo probe, or measure airspeed and VFR with a pitot tube.
• Standard inputs: Built-in, auto-zeroing micro-manometer. K-type thermocouple. 3-function “smart” probe.
• Large and clear display: Show up to 4 variables simultaneously. Scroll through all other readings on the display. Wide viewing angle. Automatically updated when probes plug in. On screen instructions for easy operation.
• Data-logging (Zephyr II+ only): Manual or automatic datalogging available. Advanced datalogging for unattended surveys. Logged data downloads to Desktop PC for analysis.
• Intuitive menu system: Minimal training required. Easy to use. Screen prompts guide user through operation.
• Comfortable to use: Large rubber grip. Single-handed operation.
• Easy access to batteries: Disposable or rechargeable can be used. AC power adapter available.
• Durable housing: Impact resistant. Lightweight. Designed for everyday use.
• Probe attachment: 3-function %RH/temperature/airspeed probe can be fixed to side of instrument.
• Large pushbutton operation
• Reporting and analytical software: GrayWolf’s highly advanced, easy-to-use WolfSense®  PC data reporting software is included with the Zephyr II+ (on CD-ROM and USB key) for analysis of logged data. Optional WolfSense ARG software automates Report generation.