Model-473B

100 mm Vane Thermo-Anemometer for Air Velocity, Temp & Humidity - HVAC Use

Compatible with Dwyer AP1 thermo-anemometer and RP1 thermo-hygrometer wired probes (sold separately)
Measure air velocity, volumetric air flow, temperature, and humidity with the included 100 mm vane probe
Visible in any condition due to high contrast and backlit LCD display
Able to store up to 99 readings for later evaluation

See Product Overview

Model-473B

From ^AUD 1,821.44

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1 Variations available

See all series options below

Data Sheet

Product Overview

Accuracy Detail Air velocity: ±1.5% of reading ±20 FPM (±0.1 m/s) [0.25 to 10 m/s]; ±1.5% of reading ±40 FPM (±0.2 m/s) [10 to 20 m/s]; ±1.5% of reading ±60 FPM (±0.3 m/s) [20 to 25 m/s], Temperature: ±0.9°F @ 77°F (±0.5°C @ 25°C), Relative humidity: ±2% @ 77°F (25°C) [10 to 90% RH]; ±4% [0 to 10, 90 to 100% RH]
Air Velocity Accuracy ±1.5%
Air Velocity, Max 5000 FPM
Air Velocity, Min 40 FPM
Applications HVAC, Industrial and Manufacturing
Battery Size and Type Alkaline 9V
Cable Length 28 in
Cable Length Note 28˝ (71 cm) retracted; 6´ (18.3 m) extended
Display Note 4.5 digit backlit display; 19,999 in selected flow units
Display Type Backlit LCD
Humidity Accuracy ± 2% RH
Humidity Range 0 to 100% RH
Humidity Response Time 1.5 s
Materials Anodized Aluminum
Media Compatibility Clean dry air / inert gas, Inert / non-reactive gases, Clean Dry Air, Helium, Nitrogen, Non-Corrosive Dry Gases, Argon, Carbon dioxide
Operating Temperature, Max 125 °F
Operating Temperature, Min 5 °F
Probe Length 8 in
Process Temperature, Max 212 °F
Process Temperature, Min -20 °F
Response Time Air Velocity: 1 s, Air Volume: 1 s, Temperature: 1.5 s
Series ID Model-473B
Supply Power Note 9 V alkaline battery, installed non-functional, user replaceable
Supply Power Type Battery
Temperature Accuracy ± 0.9 °F
Temperature Measurement Range - 20 to 212 °F
Weight 18.4 oz

Supported Applications

The Dwyer Model 473B is a handheld test instrument designed to measure air velocity, volumetric air flow, temperature, and relative humidity. The series serves applications requiring measurement in dry, clean air environments.

Air velocity monitoring using a vane probe
Volumetric airflow calculation
Temperature sensing for process or ambient conditions
Relative humidity assessment

Operating Conditions & Performance

The Model 473B operates within specific environmental and measurement limits. The device features a 4.5 digit backlit display and is powered by a user-replaceable 9 V alkaline battery.

Measurement Ranges:

Air velocity: 40 to 5000 FPM (0.2 to 25 m/s)
Volumetric air flow: 19,999 in selected flow units
Temperature: -20 to 212°F (-29 to 100°C)
Relative humidity: 0 to 100% RH

Ambient and Process Limits:

Process temperature limits: -20 to 212°F (-29 to 100°C)
Ambient operating temperature: 5 to 125°F (-15 to 51°C)

Accuracy Specifications:

Air velocity: ±1.5% of reading ±20 FPM (±0.1 m/s) [0.25 to 10 m/s]; ±1.5% of reading ±40 FPM (±0.2 m/s) [10 to 20 m/s]; ±1.5% of reading ±60 FPM (±0.3 m/s) [20 to 25 m/s]
Temperature: ±0.9°F @ 77°F (±0.5°C @ 25°C)
Relative humidity: ±2% @ 77°F (25°C) [10 to 90% RH]; ±4% [0 to 10, 90 to 100% RH]

Response Times:

Air velocity: 1 s
Volumetric air flow: 1 s
Temperature: 1.5 s
Relative humidity: 1.5 s

Configuration Options

The Model 473B series includes a stainless steel 100 mm vane probe with an insertion length of 8" (203 mm). The housing is constructed from extruded aluminum, providing protection for the electronics while maintaining a lightweight profile. A comfortable hand grip is integrated into the probe design.

Probe and Cable Configuration

Vane material: Anodized aluminum
Cable length: 28" (71 cm) retracted; 6' (18.3 m) extended

Data Storage and Display

The instrument can store up to 99 readings.

Key Product Differences

The Model 473B is part of a family that includes the Models 471B-1 (hot wire thermo-anemometer) and 485B-1 (thermo-hygrometer). The series supports interchangeable AP1, RP1, and VP1 probes which are automatically recognized by the handheld unit without requiring recalibration.