Vane Type Airflow Transmitter – Models AT400 and TAT420

Air velocity transmitters for airflow monitoring systems

Request Quote

The AT400 and TAT420 air velocity transmitters supply accurate air velocity and (TAT420) temperature data from a building or process airflow on a continuous basis to a computer, chart recorder, printer and meter or control circuit.

The THT500 humidity-temperature transmitters supply accurate humidity and temperature data from a room or process air source on a continuous basis to a computer, chart recorder, printer, meter or control circuit.

Every instrument has terminals for both DC and AC power and 0-1 V, 0-5V and 4-20mA output.

More Information

Navigate the tab section below to see this product’s Features & Benefits, Specifications, Resources, and more.

  • Specially designed for monitoring indoor air quality
  • Premier series cabling and probe connections
  • Simultaneous measurement of air velocity and temperature
  • The heavy, all metal probe can be used for airstreams that have a wide range of humidity, temperature and contaminants without compromising accuracy
  • HVAC Testing & Balancing
  • IAQ Investigations
  • Industrial Hygiene Ventilation Verification
  • Filter Face Air Velocity Measurement

Main Unit Specifications
Measurement Specifications
Air VelocityMetal rotating vaneAP275/APT275: 2.75″ diameter
AP100/APT100: 1″ diameter
Range1″ Probe: 300 to 6890 FPM (1.5 to 35 m/s)
2.75″ Probe: 50 to 7800 FPM (0.2 to 40 m/s)
Accuracy1″ Probe: ±0.5% of Full-scale + 0.75% of READING ±1 digit
2.75″ Probe: ±1.0% of READING ±1 digit
Resolution1 FPM or 0.01 m/s
TemperatureRangeAPT Probe: -4 to 176 F (-20 to 80C)
Resolution0.1°F or 0.1°C
General Specifications
Analog OutputCurrent output: DC 4~20mA
Voltage output: DC 0~1V or 0~5V
Operating TemperatureTransmitter: -4 to 176F (-20 to 80°C)
Probe: -22 to 212F (-30 to 100°C)
Power Supply120 or 220 VAC (50-60 Hz)
10 to 30 VDC
DimensionsTransmitter HousingW 4.8 x D 2.2 x H 4.8 inches (12.2 x 5.6 x 12.2 cm)
Warranty1 year1 x Rotating Vane Probe Head, Probe cable, Operation Manual, NIST Certificate
TAT4201 x Rotating Vane Probe Head, Probe cable, Operation Manual, NIST Certificate

User Manual


Engineering Drawings


Does the unit come with an NIST traceable certificate?

Yes, all our instruments come with a calibration certificate.

How often does the unit need to be calibrated?

Annual calibration is recommended to ensure accuracy. However, this can vary based on how often the anemometer is used and the environments it’s used in. Also, some companies have an SOP in place that specifies how often the instrument will need to be serviced. More specifically, regulatory compliance may dictate the calibration interval.

Can I measure airflow in flammable and corrosive gases?

No, these are thermal anemometers that generate heat when in operation; if you expose them to a flammable gas it could cause a fire or explosion. Corrosive or caustic gases, such a chlorine, will damage the sensor on contact. While it is possible to use the instrument in a non-flammable, non-caustic gases the instrument is not calibrated for these gases and it will not measure airflow accurately.

I have a challenging application. How can I be sure a Kanomax Vane Type Airflow Transmitter will fit my needs?

Give us a call! Our customer service team is happy to discuss your application and find a solution that works for you. We won’t sell you a product that doesn’t meet your needs.

Our sales representatives are here to help you find the right instrument for your application. Fast.

Request a quote today to find the product you need with expert assistance.

Request a Quote Today