A2G-20 WIKA air flow meter

Description

The A2G-20 is a high quality air flow meter used in ventilation and air conditioning applications. This model of air velocity meter is designed to accurately measure the flow of gaseous media while providing integrated temperature measurement.

The meter has electrical output signals for both measurands, allowing easy connection to control systems or building automation systems. You can select the output signal, either DC 0 … 10 V or 4 … 20 mA, directly at the instrument via jumpers. This allows flexibility and compatibility with different systems.

An additional switching output on the meter allows flexible operation to control further components of the ventilation and air conditioning system to optimise system performance.

The LCD screen and intuitive menu navigation ensure easy start-up and time-saving meter settings.

The A2G-20 is equipped with a mounting flange that allows easy mounting on round ventilation pipes or rectangular ventilation ducts. This facilitates the installation of the meter, ensuring accurate measurement of the air flow.

The A2G-20 design is maintenance-free, allowing smooth operation without the need for regular interventions.

Who is A2G-20 suitable for?

• Ventilation and air-conditioning engineers: the A2G-20 is an indispensable tool for engineers involved in the design and maintenance of ventilation systems. It provides them with accurate air velocity and temperature data, helping them to optimise the performance of their systems to achieve more efficient and energy-saving ventilation.
• Maintenance and repair technicians: the A2G-20 allows maintenance and repair technicians of ventilation systems to accurately check the operation and air quality of ducts. This allows them to quickly identify any problems or discrepancies and take appropriate corrective or maintenance action.
• System integrators: the A2G-20’s compatibility with building control or building automation systems makes it suitable for system integrators setting up complete automated solutions for the management and control of ventilation systems in buildings. The meter allows easy and direct connection to existing management and control systems.

Technical specifications

• Version:
  • non-LCD version
  • LCD version
  • LCD display with switching output
• measuring element: Pt1000 (air velocity) and NTC10k (temperature)
• the measuring area:
  • air speed:
    • 0 … 2 m/s,
    • 0 … 10 m/s or
    • 0 … 20 m/s
  • temperature:
    • 0 … 50 °C
• accuracy:
  • air speed:
    • measuring range: 0 … 2 m/s: < 0.2 m/s +5 % reading
    • measuring range: 0 … 10 m/s: < 0.5 m/s +5 % reading
    • measuring range: 0 … 20 m/s: < 1.0 m/s +5 % reading
  • Temperature: < 0..5 °C (in > 0.5 m/s)
• Power supply: UB DC 24 V/AC 24 V ±10 %
• output signal:
  • air velocity: DC 0 … 10 V (linear per m/s)
    • load min. 1 kΩ 4 … 20 mA (linear per m/s): load max. 400 Ω
  • temperature: DC 0 … 10 V (linear to °C)
    • load min. 1 kΩ 4 … 20 mA (linear per °C): load max. 400 Ω
• electrical connection:
  • screw terminals
  • M16 cable gland
  • max. 1.5 mm2
• switching output:
  • 3 screw terminals max. 1.5 mm2 (NC, COM, NO)
  • Rrle (no potential, switching contact, max. AC 250 V, 6 A, DC 30 V, 6 A, adjustable switching threshold and hysteresis)
• housing: plastic (ABS)
• LCD display: 3½-digit backlit display, size: 46.7 x 12.7 mm
• the permissible temperature:
  • medium: 0 … 50 °C, max. 95% RV
  • Environment: 0 … 50 °C, max. 95% RV
• ingress protection according to IEC/EN 60529: IP54
• weight: 220 g
• Installation: installation of the duct using a mounting flange

Video

Other designations: A2G20, A2G 20, A2G_20