TSI AVM440-A Alnor Velometer Thermal Anemometer

• High accuracy over a wide velocity range [0-6000 ft/min (0-30 m/s)]
• Simultaneously measures temperature and velocity
• Measures humidity
• Calculates volumetric flow and actual/standard velocity
• Data logging and LogDat2™ downloading software included
• Displays up to three measurements simultaneously

The Alnor Velometer® Thermal Anemometer AVM440-A is like having multiple meters for the price of one, yet it is very simple to operate. Purchase instruments with a straight or articulated probe–all in one compact package.
 
Ideal applications include HVAC system performance, commissioning, plant maintenance, critical environment certification and duct traverses.

Ideal Thermoanemometers for Your Application

The simple-to-operate Alnor Velometer Thermal Anemometers are like having multiple meters for the price of one. The thermoanemometers are available with a straight or articulated probe–all in one compact package.

Ideal applications for these thermoanemometers include HVAC system performance, commissioning, plant maintenance, critical environment certification and duct traverses.

Alnor Velometer Thermal Anemometers Deliver Crucial Measurments

• Receive high accuracy over a wide velocity range
• Simultaneously measure temperature and velocity (AVM-430, AVM-430-A, AVM-440, AVM-430-A)
• Measure humidity and calculate wet bulb and dew point with select thermoanemometers models (AVM-440, AVM-430-A)
• Calculate volumetric flow (AVM-430, AVM-430-A, AVM-440, AVM-430-A)
• Display up to three measurements simultaneously (AVM-430, AVM-430-A, AVM-440, AVM-430-A)

Everything You Need for Accurate Results

The Alnor Velometer Thermal Anemometers are supported with a host of accessories to enhance their performance and deliver the results you need.

• Data logging and LogDat2™ downloading software included
• Articulated probe version available

THERMAL ANEMOMETERS

Models AVM440 and AVM430
The Models AVM440 and AVM430 are like having multiple meters for the price of one, yet simple to operate. Purchase instruments with either a straight or articulated probe—all in one compact package.

Features and Benefits

• Range is 0–4,000 ft/min. (0–20 m/s)
• Large, easy-to-read display
• Press button to hold reading

Thermo-Anemometers (Hot-Wires)

Thermo-anemometers, also known as “hot wires,” operate on the principle of heat transfer. A sensor is heated above room temperature by passing current through an electrical resistance and the energy is converted to heat. Through convective heat transfer, the heat is transferred to air passing over the heated element. The electronics provide more power to the heated wire to maintain the initial temperature at zero flow, and this increased power curve signal is converted to a velocity reading on the display.

Thermal anemometers accurately measure a wide range of velocities, anywhere from 10 to 10,000 fpm (.05 to 51 m/s). They have small probe diameters which allow them to be placed in tight areas, such as measuring air velocity in between circuit boards in a PC or in small ducts. Thermo-anemometers have air temperature limitations. Most units have a maximum temperature of approximately 180 to 200°F (82 to 93°C), which generally limits their use to ambient conditions.

Thermo-anemometers are commonly used to measure velocity in paint spray booths, laminar flow hoods, air flow system balancing and duct traverses, pharmaceutical manufacturing areas, clean-room biological safety cabinets and fume hood testing, room air currents, and draft measurements.

Basic Thermo-Anemometers

These small, compact models are useful for general air velocity measurements. Velocity ranges are typically less than 4000 fpm (20 m/s) and temperature measurement capability along with a telescopic probe may be available on some models. Most models offer the following:
Low cost instruments with good accuracy.

• Available with a digital LCD or analog meter readout.
• Available as intrinsically safe models.
• Available in English or metric models.

Thermo-Anemometers with Mathematical Calculations

These models are commonly used to perform duct traverses and face velocity measurements of fume hoods and HEPA filters due to their ability to take multiple measurements and to average the readings. Optional portable printers can be used with these instruments to print test data in real time. They usually provide the following:

• Wide velocity and temperature range.
• Velocity to volume flow conversion based on duct dimensions.
• Telescopic or telescopic articulated probes.
• User-adjustable dampening or time response settings.
• English or metric readout capability.

Comprehensive Thermo-Anemometers

These models provide the same accurate velocity and temperature measurements as the other models. Additional functions include humidity measurement in %RH and conversions to wet bulb and dewpoint temperatures. A data logging function allows the user to program the number of samples to be taken and the time interval between samples. This can be a very useful feature when tracking trends over a period of time. These meters offer the following:

• Segregate data groups in separate test IDs.
• Recall stored data on instrument display.
• Download stored information to a PC or portable printer.
• Offer telescopic or telescopic articulated probes.
• Perform density correction.
• Have backlit LCD display.