Extech 451112 Operating Manual

User's Guide

Vane Anemometer

Model 451112

• Measures Air Velocity & Temperature

• Degrees C/F switchable

• 6 selectable units of measure

• Data Hold function

Introduction

Congratulations on your purchase of Extech’s Vane Anemometer. This meter is shipped fully
tested and calibrated and, with proper use, will provide years of reliable service.

Specifications

General Specifications

Display

0.7" (18mm) 3-1/2 digit (1999 count) LCD

Measurement m/s (meters per second), km/h (kilometers per hour), ft/min

(feet per minute), knots (nautical miles per hour), Temp. °C/°F

Data hold Freezes present value on display when selected
Sensor Structure Air velocity sensor: Conventional twisted vane arm with

Ambient 32 °F to 122 °F (0 °C to 50 °C); <80%
Power Supply 9V battery (Heavy duty type)
Power Current Approx. 9 mA DC
Weight 12 oz. (325 g) (including battery)
Dimensions Main instrument: 6.6 x 3.2 x1.2" (180 x 72 x 32 mm)

Range Specifications

Measure

m/s 0.4 – 30.0 m/s 0.1 m/s ± (2% + 0.2 m/s)

km/h 1.4 – 108.0 km/ 0.1 km/h ± (2% + 0.6km/hr)
ft/min 80 – 5910 ft/min * 10 ft/min ± (2% + 40 ft/min)
knots 0.8 – 58.3 knots 0.1 knots ± (2% + 0.4 knots)

Temp. 0 to 60oC / 32 to 140oF 0.1oC / 0.1oF 0.8oC / 1.5oF

* Multiply displayed ft/min readings by a factor of 10

balanced, low-friction ball-bearing design
Temperature sensor: Thermister

Sensor Head: Round, 2.8" (72 mm) Dia.
Sensor Cable: 39" (1m) length

Range Resolution Accuracy

2

451112 V3.3 1/08