Anemometer - AVM 40 (Kestrel 4000)
Anemometer is a mobile weather station for the determination of the following environmental data: wind speed, temperature, relative humidity, dew point, wind chill, heat index, air pressure, high pressure, thermal stress / with date and time

The anemometer AVM 40 (Kestrel 4000) is a pocket anemometer that makes accurate measurements of environmental conditions. Because of its size and low weight, the anemometer AVM 40 is a real weather station that can be used anywhere. At the touch of a button, the anemometer shows all the weather information graphically and with numerical values. Thus, this anemometer is ideal for construction workers, employees working outdoors, engineers/technicians, water sports fans, pilots, farmers, and many others who depend on the weather or whose activities are influenced significantly by it. With a simple anemometer, you can easily determine wind speed, temperature, wind chill, dew point, relative humidity of air, heat index, barometric pressure and high pressure air against NN.
The portable climate anemometer indicates individual measurement values, minimum, maximum and average values. The measurement values can also be represented graphically.
In the memory of the handheld anemometer, you can save up to 250 readings (with date and time). Different time intervals can be set freely.
This anemometer has an easy to read backlit display. The valuable winged wheel allows very accurate measurements of wind velocity (± 3% of each measured value) and within a large measuring field. If for any reason, the winged wheel of the anemometer gets damaged, the user can change it very easily. If you are looking for an anemometer that has internal data memory, click on PCE-007 anemometer.

 - Compact and rugged anemometer

 - High precision

 - Precise winged wheel
     
 - Easy to read large digital display (LCD) with 
   additional graphics representation (specifically    adapted to the user)

 - Backlight

 - IP67 waterproof (floatable)

 - Replaceable winged wheel

 - Long life lithium battery 

 - Data memory for 250 values
     

Anemometer AVM 40

Thermal stress

Workers working near large machinery that emit thermal heat energy are exposed to very high thermal stress. This phenomenon can cause physiological damage, fainting, muscle spasms, heart palpitations and even death.
Therefore it is necessary to use a heat stress anemometer. This anemometer detects the temperature and compares it with the air environment. This result corresponds to the temperature that is noted in the body which relates to the ambient air temperature.

Technical specifications

Model

Anemometer AVM 40, portable

Wind speed

Measurement fields

(m/s)

0.3 - 41

(feet/min)

60 - 7830

(km/h)

1 - 144

(mph)

0.7 - 89

(knots)

0,6 - 78

(Beaufort)

1 - 16

Reaction time

Approx. 1 second

Temperature

Measurement fields

-29 ... +70 °C

Reaction time

approx. 1 min

Thermal stress

-45 ... +125 °C

Wind chill

yes

Wet bulb temperature

yes

Relative humidity (calibration))

Measurement fields

5 - 95 % HR

Reaction time

approx. 1 min

Dew point

±3 ºC (over 20% R.H.)

Wet bulb temperature

±3 ºC

Barometric air pressure

Measurement fields

870 - 1080 hPa/mbars

Height above sea level

Yes

Resolution

Wind speed in knots
m/s, km/h or mph: 0.1
Wind speed in ft/min: 10
Wind and chill temperature: 0.1 ° C
Relative humidity: 0.1%
Barometric air pressure: 1 hPa

Accuracy

Wind speed: ± 3% of reading
Wind chill and temperature: ± 1 ° C
Dew point temperature: + -2 ° C
Heat index: + -3 ° C
Relative humidity: + -3%
Barometric air pressure: + -3 hPa
Thermal Stress: + -3 ° C

Automatic switch-off

After 30 minutes of no activity

Display

LCD

Data update in display

every second

Propeller

Diameter 25 mm, set on bearings

Power supply

2 x AAA batteries for approx. 400 hours

Dimensions

127 x 45 x 28 mm

Weight

102 g

Protection type

IP67 - waterproof up to 1 m

Explanation of different environmental conditions

Wind Chill

The Wind Chill describes the difference between the measured and the perceived air temperature depending on air speed. We have another type of anemometer which can detect the Wind Chill and other parameters.

Atmospheric pressure
The atmospheric pressure anywhere on our planet is the hydrostatic pressure of the air that prevails in that place. That pressure is equivalent to the weight of the atmospheric column that exists on the surface of the earth or over anybody that is in it. The average atmospheric pressure at sea level is 101325 Pa = 1013.25 hPa = 101.325 kPa, and is a part of normal conditions.

Dew point/dew point temperature
The air could absorb more vapour with the increase in temperature. When the temperature of any element of air drops, and simultaneously the air humidity reaches 100%, the remaining vapour falls as rain. This limit is called the dew point. Buildings must be constructed in a way that the temperature in the low part of the building would never fall below the dew point. This prevents condensation of water that results in damaging buildings or in mould. The air currents that pass through the insulation are especially harmful. In these cases we must always expect a lower dew point. Also the wet bulb temperature, which plays an important role in the weather industry, is a very important parameter in many other sectors.

Navigation
This anemometer AVM-40 is programmed to display 10 types of measurements (some are only estimates) in 3 modes. These measurements are listed below with their respective icons on the screen. Use the ▲ and ▼ button to move between different measurements.
These modes are:
      - Current: displays the instantaneous reading
      - Minimum/Maximum/Average: displays readings Min/Max/Average information
        previously saved
      - Display Graphics: Plots of up to 250 data points saved

In the next picture you can see examples of each one of the screens of the anemometer AVM-4000, so they can cycle through different display modes with the use of ◄ and ►.

Uses of the anemometer AVM-40

This Anemometer AVM-40 can be used to make different measurements (wind speed, temperature, barometric pressure, relative humidity). In the left picture, you have the actual size of the anemometer AVM-40 and its large LCD screen where you can see the performed measurements without any problems. At the following link you can view a list of different types of anemometer for measuring air.
A high precision temperature sensor allows quick temperature measurements with an accuracy of ± 1 ° C. The anemometer also has a sensor for relative humidity with an accuracy of +/-3% (in addition a calibration set is available for operations with optimal values of continuous measurement of moisture). The pressure sensor based on silicon monolithic allows to measure barometric pressure (res. 0.1 mbar). You can see the rest of the anemometer values derived from these basic units, such as the dew point etc., in the section "Technical Data " (wind chill = perceived temperature, heat index, dew point, density).
The familiar term wind chill is a combination of wind speed and temperature. A higher wind speed causes a greater sensitivity to cold.
The rate of warming is a combination of humidity and temperature (hot humid air is perceived as much hotter than hot dry air).
The dew point is the temperature (temperature threshold) where the humidity is deposited on objects that are colder than the air temperature.

What is air pressure?
The atmospheric pressure is the weight of air in the atmosphere that exerts pressure on a particular point on the surface of the earth. Generally, the more air above an area is, the higher the pressure is. This means that atmospheric pressure changes with altitude. For example, atmospheric pressure is higher at sea level than at the top of a mountain. To compensate the pressure difference and facilitate the comparison between various locations with different altitudes, atmospheric pressure is usually adjusted to the equivalent of the sea level (barometric pressure). The barometric pressure varies with the weather, so this is an essential tool for weather forecasts. With this altimeter you will not have any problems taking the measurement of barometric air pressure.

What is draft?
The air stream or draft is produced in the atmosphere by various natural causes. Wind is caused by differences in temperature that occur when there is uneven heating in several areas of land and atmosphere. These hot air masses tend to move up and replace the hot air by cooler air masses which are therefore denser. Wind is the term for the air current that moves horizontally, and flow is the term for the air that moves vertically. This anemometer can track the wind speed.

Delivery contents
1 x Pocket Anemometer AVM climate-40 (Kestrel 4000), 1 x battery, instruction manual

Optional accessories

Set for calibration

Spare winged wheel

Here you will find all the measuring instruments available at PCE Instruments.

Contact:
PCE Instruments UK Limited
Units 12/13 Southpoint Business Park
Ensign Way, Southampton
United Kingdom, SO31 4RF
Phone: +44 ( 0 ) 2380 98703 0
Fax: +44 ( 0 ) 2380 98703 0

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