Dwyer Instruments VT-300 Specifications

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MODEL VT-300

MINIATURE VANE THERMO-ANEMOMETER

Telescoping Probe Measures Air Velocity, Air Volume, Temperature, and Humidity

TEST & DATA

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The MODEL VT-300 Miniature Vane Thermo-Anemometer measures air velocity,
air volume, temperature, and humidity inside air ducts. This meter includes a

telescoping vane probe that is only 0.7˝ (18 mm) in diameter that allows duct traverse
measurements up to 20˝ ducts. User-selectable units include ft/min, m/s, knots,
mph, and km/hr. The vane probe has a built-in sensor to record temperature in °F
or °C, as well as humidity in %RH. There are three modes which include viewing

data in real time, manual recording, and automatic recording. Model VT-300 can store

measurements that can later be transferred to a PC via RS-232 communication. The
vane probe is detachable for easy replacement, if necessary. Each unit is supplied
with a hard carrying case, batteries, logging software CD, USB to RS-232 cable and

instruction manual.

FEATURES/BENEFITS

Vane Thermo-Anemometers

• 3-in-1 parameters: Air Velocity/Flow, RH, and Temperature

• Telescopic probe for traversing ducts up to 20”

• Built-in data logging for paperless reporting

• Vane Anemometer offers wider application use vs pitot or hotwire

• Hard case, Batteries, and software included

APPLICATIONS

• Building commissioning

• Building HVAC test and balance

• Critical environment testing

• Industrial process verication

• Instrumentation validation

MODEL CHART
Model Description
VT-300 Miniature vane thermo-anemometer

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PS/2 PLUG

9V DC POWER PORT

1/8˝ RS232 PORT

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SPECIFICATIONS
AIR VELOCITY
Range: 98.4 to 3937 ft/min (0.5 to 20

m/s).

Accuracy: ±3% of reading + 0.2 m/s.
Resolution: 0.1 m/s.
Response Time: 1 s.

TEMPERATURE
Range: -4 to 140°F (-20 to 60°C).
Accuracy: ±1°F (±0.6°C) from -4 to

122°F (-20 to 50°C); ±2.2°F (±1.2°C)
from 122 to 140°F (50 to 60°C).

Resolution: 0.1°F (0.1°C).
Response Time: 60 s (typ).

RELATIVE HUMIDITY
Range: 0.1 to 99.9% RH.
Accuracy: ±3% RH at 25°C (10 to 90%

RH); ±5% RH (0.1 to 10% RH, 90 to

99.9% RH).

Resolution: 0.1% RH.
Response Time: 60 s (typ).

AIR VOLUME
Range: 0 to 99,999 (CFM or m3/s).
Resolution: 0.1 (0 to 9999.9) or 1

(10,000 to 99,999).

TELESCOPING

A-VA3000-P

Retracted
Extended

WET BULB
Range: -7.6 to 158°F (-22 to 70°C).
Resolution: 0.1°F (0.1°C).

METER
Temperature Limits: Operating: 32 to

122°F (0 to 50°C); Storage: -4 to 122°F
(-20 to 50°C).
Humidity Limits: Operating: <80% RH;
Storage: <90% RH.

Display: 1 x 1.8˝ (26 x 45 mm).
Serial Communications: 9600 bps, 8

data bits, no parity.

Power Requirements: (4) AAA 1.5
V alkaline batteries, included, user

replaceable.

Battery Life: 100 hours.
Vane Diameter: 0.7˝ (18 mm).
Weight: 7.41 oz (210 g).

“L” in [mm]

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A-551

ACCESSORIES
Model Description
A-VT300-P
A-551

Replacement probe with miniature vane
Replacement probe with large vane

DWYER INSTRUMENTS, INC. | www.dwyer-inst.com202