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Airflow sensors
Type Item no. ADG Euro / pc.

Air flow monitor 230 V AC SL 101.1 101603 01 121.20
Air flow monitor 24 V AC SL 101.2 101604 01 121.20
Air flow monitor 24 V DC SL 101.3 101605 01 121.20
with mounting flange for installation in ventilation ducts. Optical
indicator of the operating conditions (start-up – operation – failure)
via LED. Calorimetric measuring principle. 1 floating normally open
contact. The threshold value can be set infinitely by a potentiometer.
Setting range: 1 – 10 m / s.
If the threshold value is undershot, the relay drops out.
Maximum immersion depth: 115 mm
Permiss. amb. cond.: -10 – 50 °C, 0 – 90 % RH
(non-condensing)
Protection class: IP 65
Breaking capacity of the relay contact: 3 A / 250 V
Terminal cable: 2 m, 4 x 0.5 mm2
Data sheet no. 11101

Air flow monitor 230 V AC RLSW 6.1.1 101453 01 305.50
Air flow monitor 24 V AC / DC RLSW 6.1.5 101454 01 305.50
Compact device for on-site mounting with a separate
airflow sensor and mounting flange for duct installation
Calorimetric measuring principle. With compensation of
temperature and sensor rupture protection. 2 floating
switching contacts. Internal reset push-button.
The following parameters can be set via potentiometer:
Flow speed: 0.2 – 15 m / s
Switching hysteresis: 1 – 10 %
Start-up bridging: 15 – 120 s
Switch-off delay: 2 – 20 s
The air flow monitor is activated on applying the voltage. If the set
flow speed is reached during the startup lag, the flow monitoring
relay connects and e.g. enables humidification. If the flow speed is
not reached, the alarm relay connects. If the flow speed falls below
the set value during operation, the flow relay connects after a
switch-off delay.
Maximum immersion depth of the sensor: 120 mm
Protection class sensor: IP 67
Protection class housing: IP 65
Media temperature: -10 – 80 °C
Permiss. amb. cond.: 0 – 60 °C, 0 – 95 % RH
(non-condensing)
Protection class: IP 54
Breaking capacity of the relay contacts: 10 A / 250 V
Terminal cable of sensor: 1.8 m, 3 x 0.5 mm2
Data sheet no. 11201

Air flow transducer 24 V DC SL 520 1.3S 105583 01 440.70
with mounting flange for installation in ventilation ducts. Visual indica-
tion of operating status through LED.Calorimetric measuring principle.
1 analog output 0 – 10 V (not linear – please see data sheet).
Setting range: 2 m / s = 1 V – 20 m / s = 10 V
Maximum immersion depth: 115 mm
Permiss. amb. cond.: -10 – 50 °C, 0 – 90 % RH
(non-condensing)
Protection class: IP 65
Terminal cable: 2 m, 4 x 0.5 mm2, plug M16
Data sheet no. 11102

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