Calibration and Equipment Repair

  • Sound Level Meters
  • Noise Dosimeters
  • Air Samplers
  • Field Flow Calibrators
  • Gas Detectors
  • Velocity Meters
  • Indoor Air Quality Meters
  • Heat Stress Monitors
  • Temperature / RH
  • Particle Counters
  • Dust Monitors
  • Flow Hoods

Air Velocity Meter Anemometer Calibration Lab Services

Velocity or volume measurements are typically used to determine proper performance of an airflow system.  Thermoanemometer applications for low flow air velocity fume hood performance, indoor air quality studies, diffuser design, duct traverses, and other general flow uses.  Many of the thermoanemometers have built in algorithms for determining flow through ducts of different sizes and configurations.

Some manufacturers offer units with built in digital manometers for use with a pitot tube.  A pitot tube and manometer can measure static pressure and velocity pressure that is quite useful in determining maximum performance with general and local exhaust ventilation.

Applications for rotating vane anemometers include manufacturing, laboratory, computer rooms, environmental control, flow hood monitoring, and other applications where precise air measurement is required.

Temperature and relative humidity are features that can be found on some units depending on their application.  CIH Equipment Company offers air meter calibration for all of these instruments to ensure proper velocity, temperature, relative humidity, and accurate pressure readings. 

Why calibrate your velocity meters?

  • These meters typically get fouled over a period of time and must be rechecked for accuracy.
  • We conduct air meter calibration for the other functions like temperature, relative humidity, and other sensors. 
  • Well designed and functioning ventilation system play a critical role in lowering airborne concentrations of vapors and dusts.
  • Our bench top wind tunnel systems by GDJ and Omega are capable of 100-9,000 fpm and are traceable to NIST. Velocity meter calibration is part of our A2LA ISO 17025 scope of accreditation.

Thermal Anemometer Calibration Services

Thermal anemometer or "hot-wire" anemometer calibaration measures the flow speed by a small probe inserted in the flow. The sensitive element of the probe is a small wire about 1 mm wide and a few thousands of an inch thick that is heated at a constant temperature of about 200 Celsius.

Vane Anemometer Calibration Services

Wind Vane Anemometers are further inspected for physical defects such as burs, cracks or chips in the vane blade. Upon completion of testing, all data is then recorded and compared to manufacturer specifications or client requested specifications.

Alternate Terms for Anemometers

  • Air Flow Meters
  • Air Velocity or Wind-speed Meters
  • Wind cups or weathervanes


What is an Anemometer?

Anemometers measure the speed (velocity) of moving air. Thermo-Anemometers also measure temperature by way of a thermometer located in the Anemometer sensor. The measurement units for Anemometers include: Feet per minute (ft/min), meters per second

(m/s), kilometers per hour (km/hr), miles per hour (mph), nautical miles per hour (knots), and Beauforts.


How does an Anemometer measure moving air?

Anemometers measure moving air with a rotary sensor which acts very much like a weathervane and can be likened to the blades of a fan. The vane freely rotates in response to air flow and as the air moves through the vane the blades turn in proportion to the speed of the air.


What is CFM / CMM?

Cubic Feet per Minute (CFM) or Cubic Meters per Minute (CMM) are units of measure for Air Volume measurements. This is a measurement of the quantity of moving air through an air duct, passageway, or enclosure. In order to accomplish this, the area of the duct must be measured. The area value (in ft2 or m2) is entered by the user by push button or keypad into the meter and an air velocity measurement is taken. The meter then calculates the CFM or CMM automatically.


What is the significance of a built-in IR thermometer?

Having an IR thermometer as part of an Anemometer offers the user several important benefits:

  • Two tools in one
  • Save time and cost
  • Check for hot spots in duct work, electrical panels, and wiring conduits


Typical Anemometer Applications

  • Air duct measurements
  • Positive pressure tests in clean rooms
  • Fume hood testing and verification
  • Automobile engines analysis
  • Automobile passenger compartment tests
  • Ionizer flow output monitoring
  • Ventilation system inspection
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