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Air Velocity Transmitter

Air Velocity Transmitter

Product Details:

  • Capacity Industrial Continuous Operation
  • Resolution 0.1 m/s
  • Humidity % 0 to 95% RH (non-condensing)
  • Connectivity Type 4-20mA/0-10V analog output
  • Diameter Probe diameter 8 mm
  • Wind Speed 0 - 30 m/s
  • Sensor Type Hot-wire anemometer
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Air Velocity Transmitter Product Specifications

  • LCD Digital Display
  • Display in m/s or selectable format
  • ABS Housing
  • IP65
  • 4-20mA
  • 24V DC 10%
  • Industrial Continuous Operation
  • Air, Non-corrosive Gases
  • Max 2 VA
  • -10C to +60C
  • 0.1 m/s
  • 0 to 95% RH (non-condensing)
  • 3% of reading
  • Transmitter
  • 4-20mA/0-10V analog output
  • Probe diameter 8 mm
  • Hot-wire anemometer
  • 0 - 30 m/s
  • 0 30 m/s
  • 0 to 30 m/s

Product Description

The AVT is an electronic air velocity and temperature transmitter for air and non-combustible gases with optional relay output.

AVT air velocity transmitters are engineered for building automaton in the HVAC/R industry. They are electronic air velocity and temperature transmitters for air. They measure air velocity and temperature in ventilation ducts, with field selectable options for measurement range and output settings in a single device.

AVT has a duct mount probe and an adjustable duct flange suitable for round or rectangular ducts.

AVT series devices include:

  • Separate readings and outputs for air velocity and temperature
  • Proportional output options: voltage (010 V) and current (420 mA)
  • PID controller for air velocity (-D models)
  • Three field selectable measurement ranges for air velocity, selectable with jumpers (models without display)
  • Freely selectable measurement range for air velocity via menu (-D models)
  • Field selectable measurement units (-D models):
    air velocity: m/s, ft/min
    temperature: Celsius, Fahrenheit

AVT series device options offer:

  • Display (-D models)
  • Field adjustable relay (-R models)
  • Modbus (-MOD models)

Optional relay output : Will work as Air flow Switch Technical Details :

Air velocity measurement:

Measurement range:
02 m/s, 010 m/s, 020 m/s, freely selectable
Accuracy (typ at 25 C):
v 0.15 m/s and 2 m/s (0.2 m/s + 2 % from reading)
v > 2 m/s and 10 m/s (0.5 m/s + 3 % from reading)
v > 10 m/s (1.0 m/s + 3 % from reading)

Temperature measurement:

Measurement range:
-2550 C (probe)
Accuracy (25 C):
0.5 C (air velocity > 0.5 m/s)

Measuring units:

Air velocity: m/s or ft/min
Temperature: C or F

Supply voltage:

24 VDC 10 % / 24 VAC 10 %

Current consumption:

max. 80 mA + 40 mA with mA output + 10 mA with relay option (DC supply voltage)

Output signal 1 (T out [C]) :

010 Vdc, load > 1 k
420 mA, load 20400

Output signal 2 (v out [m/s]) :

010 Vdc, load > 1 k
420 mA, load 20400

Optional relay output:

250 Vac, 6 A res., adjustable operating direction, switching point and hysteresis

Operating temperature:

-2550 C (probe)
050 C (transmitter housing)

Probe:

Stainless steel, adjustable immersion length, mounting flange included

Protection standard:

IP54, cable downwards



Precision and Versatility

Engineered for industrial use, this transmitter provides high accuracy (3% of reading) and rapid response for dynamic environments. The selectable output format (4-20mA/0-10V) and dual mounting options (duct or wall) support various installation requirements. Its compact 8 mm sensor probe and lightweight design enhance adaptability.


User-Friendly Features

The transmitter's backlit LCD clearly displays velocity readings in either m/s or ft/min. Adjustment for zero and span is straightforward via a front-mounted potentiometer. Removable screw terminal cable connections simplify installation and maintenance, making this transmitter ideal for seamless integration into building automation or process control.


Reliable and Robust Design

Built for durability, the IP65-rated ABS housing ensures protection against dust and moisture in controlled indoor climates. Operating over a wide temperature and humidity range (-10C to +60C, 0 to 95% RH non-condensing), the device is suited for demanding continuous industrial monitoring of air and non-corrosive gas flows.

FAQ's of Air Velocity Transmitter:


Q: How do I install the air velocity transmitter in a duct or on a wall?

A: The transmitter can be mounted directly onto a duct or a flat wall using suitable hardware. Ensure that the sensor probe is properly positioned in the airstream for accurate measurement and that all connections through the removable screw terminal are secure before powering on.

Q: What output signals are supported by the transmitter, and how do I select between them?

A: This unit offers selectable analog outputs, either 4-20mA or 0-10V, which can be chosen during setup according to your system requirements. Refer to the wiring diagram and use the selection switch or jumper inside the housing to configure your preferred signal type.

Q: When should I perform zero or span adjustment, and how is it done?

A: Zero and span adjustments are recommended after initial installation or whenever calibration checks indicate a drift. Both can be performed easily using the potentiometers accessible on the front panel, following the instructions in the user manual.

Q: Where can I use this transmitter, and what media is it suitable for?

A: It is designed for use in indoor, controlled climate environments and measures the velocity of air or non-corrosive gases. The protection class (IP65) and robust construction make it suitable for a range of industrial applications such as HVAC, cleanrooms, and process control.

Q: What is the benefit of the selectable display units and output types?

A: Selectable display units (m/s or ft/min) improve operational flexibility for local or international users, and the choice of output signal (4-20mA or 0-10V) allows easy integration into various monitoring and control systems.

Q: How does the transmitter handle variable environmental conditions during operation?

A: With an operating range of -10C to +60C and tolerance for up to 95% RH (non-condensing), the device reliably functions in diverse indoor industrial settings without performance loss, provided the environment is controlled and free from corrosive substances.

Q: What are the main advantages of using a hot-wire anemometer for air velocity measurement?

A: The hot-wire anemometer principle offers fast (<2 sec) and accurate velocity readings (3% of reading) with high resolution (0.1 m/s), making it ideal for real-time monitoring and control tasks in industrial applications demanding precision.

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