Extech HD350 Specifications

Ordering Information:

HD350 ............Pitot Tube Anemometer + Differential Manometer

Specifications subject to change without notice.
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4/5/11 - R1

Features:

• Simultaneous display of Pressure, Air Velocity or Air

Flow plus Temperature

• ±0.7252psi range

• 5 selectable units of pressure measurement

• Max/Min/Avg recording and Relative time stamp

• Data Hold and Auto power off functions

• Large LCD display with backlighting

• Zero function for offset correction or measurement

• Store/Recall up to 99 readings in each mode

• USB port includes software

• Includes Windows®compatible software with cable,

9V battery, pitot tube with two 33.5” (85cm) connection
hoses, and hard carrying case

Pitot Tube measures Air Velocity/Airflow

In difficult-to-reach or tight locations where a vane anemometer won’t fit

Pitot Tube Anemometer + Differential Manometer

Specifications Range Resolution Accuracy

Pressure
psi 0.7252psi 0.0001psi ±0.3%FS
mbar 50.00mbar 0.01mbar ±0.3%FS
inH2O 20.07inH2O 0.01inH2O ±0.3%FS
mmH2O 509.8mmH2O 0.01mmH2O ±0.3%FS
Pa 5000Pa 1Pa ±0.3%FS
Repeatability ±0.2% (Max. ±0.5%FS)
Linearity/Hysteresis ±0.29FS
Maximum Pressure 10psi
Response Time 0.5s typical
Air Velocity
ft/min 200 to 15733 1 ±3% rdg
m/s 1 to 80.00 0.01 ±3% rdg
km/h 3.5 to 288.0 0.1 ±3% rdg
MPH 2.25 to 178.66 0.01 ±3% rdg
knots 2.0 to 154.6 0.1 ±3% rdg
Air Flow
CFM 0 to 99,999 0.001 ±3% rdg
CMM 0 to 99,999 0.001 ±3% rdg
Temperature
°F 32.0 to 122.0°F 0.1° ±2°F
°C 0 to 50°C 0.1° ±1°C
Dimensions/Weight
Meter: 8.2 x 2.9 x 1.9" (210 x 75 x 50mm) / 12oz (340g)
Pitot Tube: 15.4 x 7.7” (390 x 195mm) / 7.2oz (204g)

USB port includes PC Software

Unique Pitot tube sensor used for measuring air
velocity, airflow, and pressure in vents, ducts and
other small openings.

Air Velocity

Pressure