Air velocity meter

Name: Air velocity meter
Brand: WIKA

Air velocity meter with integrated temperature measurement, electrical output signals for velocity and temperature, and optional switching output for ventilation and air-conditioning applications.

Range

0…50 °C

Output

DC 0...10 V · 4...20 mA

Accuracy

< 0.5 °C (v > 0.5 m/s) for temperature

Protection

IP54

2.2 test report

Price

On request

Depends on configuration

Request a quote

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Description

The model A2G-20 air velocity meter is used for measuring flow rates of gaseous media in ventilation and air-conditioning applications. In addition, the A2G-20 features integrated temperature measurement.

Electrical output signals for both measurands (DC 0 … 10 V or 4 … 20 mA; adjustable at the instrument via jumpers) enable the direct connection to control systems or the building automation system.

Air velocity meter with LC display, model A2G-20

An additional switching output enables a flexible operation for controlling further components of a ventilation and air-conditioning system.

The LC display and the clear menu navigation enable a time-saving and simple commissioning.

Special features

Electrical output signal DC 0 … 10 V or 4 … 20 mA, can be selected directly at the instrument via jumpers
Output signal for velocity and air temperature in one instrument
With switching output
Mounting flange for mounting on circular ventilation pipes or rectangular ventilation ducts
Maintenance-free

Identification

Model	A2G-20
Product family	A2G
Subcategory	Air velocity meter with temperature measurement

Measuring range

Temperature ranges

+0…+50 °C

Accuracy

Accuracy class

< 0.5 °C (v > 0.5 m/s) for temperature, < 0.2/0.5/1.0 m/s +5 % of reading for air velocity depending on range

Process conditions

Process connection	Mounting flange for circular and rectangular ducts
Process temperature	+0…+50 °C

Electrical characteristics

Output signal	DC 0...10 V · 4...20 mA
Power supply	DC 24 V / AC 24 V ±10%
Electrical connection	Screw terminals, Cable gland M16, max. 1.5 mm²

Operating environment

Ambient temperature	+0…+50 °C
IP rating	IP54
Weight	0.22 kg

Certifications and approvals

Certifications

2.2 test report

Additional details

Sensor type	Pt1000, NTC10k
Datasheet languages	EN

Tables from datasheet

Air velocity meter, model A2G-20

Version	■ Version without LC display ■ Version with LC display ■ Version with LC display and switching output
Measuring element	Pt1000 (air velocity) and NTC10k (temperature)
Measuring range
Air velocity	0 …2m/s [0 …7ft/s], 0 …10m/s [0 …33ft/s] or 0 …20m/s [0 …66ft/s] can be selected at the instrument via jumpers
Temperature	0 …50°C[32 …122 °F]
Accuracy
Air velocity	Measuring range 0 …2m/s:< 0.2 m/s [0.3 ft/s] +5 %of reading Measuring range 0 …10m/s:< 0.5 m/s [1.6 ft/s] +5 %of reading Measuring range 0 …20m/s:< 1.0 m/s [3.3 ft/s] +5 %of reading
Temperature 1)	< 0.5 °C [0.9 °F] (v > 0.5 m/s)
Power supply U B	DC 24 V/AC 24V ±10%
Output signal
Air velocity	DC 0 …10V(linear to m/s): Load min. 1 kΩ 4 …20mA(linear to m/s): Load max.400Ω
Temperature	DC 0 …10V(linear to °C): Load min. 1 kΩ 4 …20mA(linear to °C): Load max.400Ω
Electrical connection	Screw terminals Cable gland M16 max.1.5mm 2
Switching output	3 screw terminals max.1.5mm 2 (NC, COM, NO) Relay (potential-free, change-over contact, max.AC 250 V, 6 A, DC 30 V, 6 A, adjustable switching threshold and hysteresis)
Case	Plastic (ABS)
LC display	3 ½-digit display with backlighting Size: 46.7 x 12.7mm
Permissible temperatures
Medium	0 …50°C, max. 95 %r.h.
Ambient	0 …50°C, max. 95 %r.h.
Ingress protection per IEC/EN 60529	IP54
Weight	220 g
Mounting	Duct installation by means of mounting flange