Chapter 1: Introduction 3
Micromanometer
The micromanometer is a multifunction instrument useful in obtaining air velocity, air flow, absolute and
differential pressure, temperature, and humidity measurements when used with the tools listed below. The
lightweight micromanometer incorporates auto-zeroing for high-accuracy, low-end pressure
measurements.
Standard Tools
This section gives a brief description of standard tools for the micromanometer.
Pitot Tube
The pitot tube is primarily used to obtain air velocity, air volume, and velocity pressure measurements
within ductwork.
Static Pressure Probe
The static pressure probe is primarily used to obtain static pressure measurements within ductwork.
Optional Tools
This section gives a brief description of optional tools for the micromanometer.
Capture Hoods
Capture hoods are primarily used to obtain volumetric air flow measurements through diffusers, registers
and grilles. Capture hoods are available in a kit with one 2 ft × 2 ft (610 mm × 610 mm) fabric hood,
frame, and base assembly. Alternate hood sizes are available and descriptions and part numbers can be
found in Table 2
of Chapter 2 in this manual.
Velocity Matrix
The velocity matrix is primarily used to obtain area-averaged multi-point air velocity measurements
useful in laboratory hood face velocity testing, filter face velocity testing, and other applications.
Air Flow Probe
The air flow probe is primarily used to obtain single point air velocity or air volume measurements in
ductwork.
Temperature Probe
The temperature probe is used to obtain temperature measurements over the range of -40 to 250°F
(-40 to 121°C).
Temperature/Humidity Probe
The temperature/humidity probe is used to obtain temperature measurements over the range of 14 to
140°F (-10 to 60°C), humidity measurements over the range of 0 to 95% RH, along with calculated wet
bulb temperature of 40 to 140°F (4 to 60°C) and dewpoint temperature of 5 to 120°F (-15 to 49°C).
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