Anemometers measure air velocity. There are two basic types for different applications all of which can be found on Sper Scientific:

Thermoelectric ("hot wire") Anemometers heat a wire to a specified temperature and then measure the rate of cooling. This rate is proportional to air speed. Thermoelectric measurement provides fast response times and excellent sensitivity to very low air flows of <1 m/s but these probes are also the most delicate of the three types and are not suitable for environments which are dusty, humid ,corrosive, or where there are rapid fluctuations in the ambient temperature all of which effect the rate of cooling. These Anemometers cover ranges of 0.01 ms to 5 m/s.

Vane Anemometers work on the principle that a freely turning turbine will rotate at a speed directly proportional to the wind speed. Vane Anemometers cover ranges as low as 0.15 m/s and as high as 40 m/s, or even higher by special order. Useful for a wide variety of applications including relatively harsh environments. Thresholds are not as low as with thermoelectric Anemometers since the vane must overcome initial friction before it will turn.

Anemometer Applications

• Education, both classroom and research
• Metallurgy Analysis
• Water Treatment Plants
• Aeolian Sand Movement Studies
• Poultry Houses and Hatcheries
• Checking Air Flow Equipment
• Environmental Protection in Mining and Manufacturing
• Exhaust Monitoring
• Measure Airflow from Smoke Stacks
• HVAC Industry
• Fume Hood Face Velocities
• Paint Hoods

Anemometer/Thermometer Standards

OSHA Source
CFR 1910.94 ANSI z9.4-1968
ANSI z43.1-966
ANSI z9.3-1970
ANSI z9.1-1969
Ventalation of Flammable and Conbustible Liquids:
CFR 1910.106 NFPA NO. 30-1969
Spray Finishing using Flammable and Conbustible Materials:
CFR 1910.107 NFPA NO. 33-1969
Resistance Welding:
CFR 1910.94 NFPA 51-1969
ANSI z49.1-1967
NFPA 51B-1962

Occupational Exposure to Hazardous Chemicals in laboratories:
CFR 1910.1450 (Chemical Hygiene Plan) The Chemical Hygiene Plan recommends that proper ventilation be provided.

Chemical Hygiene Plan is a written program developed and implemented by the employer which sets forth procedures, equipment, personal protective equipment and work practices that are capable of protecting employees from the health hazards presented by hazardous chemicals used in that particular workplace and meets the requirements of 1910.1450.

Note: Sper Scientific products are currently being used to help the end user comply with the above OSHA standards.