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Air Flow Transducer Model: ESF-35-2

Supplier: Veederline

ESF is an air flow transducer with a broad application area. It can be used for control, surveillance,and regulation of the flow rate in fresh-air and ventilation systems, etc.

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FEATURES of Air Flow Transducer Model: ESF-35-2:
· Converts airspeed into a 4 – 20mA or a 0 – 10 VDC signal
· Linear output signal
· Made with corrosion resistant material
· Fully electronic registration of airflow speed
· AC or DC voltage supply
· Compensates for changes of air temperature
· Telescopic sensor facilitates installation
· Temperature output signal 0 – 10 VDC
· Fuse protected

APPLICATION of Air Flow Transducer Model: ESF-35-2:
The ESF-35-2 airflow transducer can be used in a wide range
of applications such as:
- Measurements of airflow speed via PLC/outstation/EMS
- Regulation of airflow speed
- Monitoring of airflow speed
FUNCTION of Air Flow Transducer Model: ESF-35-2:
The ESF-35-2 transducer registers the airflow speed according
to a thermal principle based on the fact that the cooling action
of air increases with airspeed. The action is measured and
converted to a 4 – 20 mA or a 0 – 10 V signal corresponding to
airflow speeds from 0 – 8 m/s (0 – 1575 ft/min) or 0 – 16 m/s
(0 – 3150 ft/min).
INSTALLATION of Air Flow Transducer Model: ESF-35-2:
The airflow transducer ESF-35-2 is installed in such a way that
the current of air passes through the gap of the sensor head.
Conductors to and from the transducer should be kept isolated
from high-power conductors where powerful transient voltage
spikes may appear.
TECHNICAL DATA of Air Flow Transducer Model: ESF-35-2:
Airflow speed ……….……………........ 0 – 16 m/s (3150 ft/min),
(jumper selectable) 0 – 8 m/s (1575 ft/min)
Output signal (flow) ……….………….. 4 – 20 mA, 0 – 10 VDC
Output signal (temperature) …...…….. 0 – 10 VDC
Temperature range …………………… 0 – 50°C (32°F – 122°F)
Air temperature ……….……………… -10°C – 60°C (14°F – 140°F)
Ambient temperature ….…………..… -20°C – 50°C (-4°F – 122°F)
AC voltage supply ………....…………. 24 VAC (120mA)
DC voltage supply ……………...…….. 16 – 30 VDC (80mA)
Absolute accuracy …...…………..…… ±5%
Rise time …………………………..…… 20 sec
Time constant ……………………….... 5 sec
Depth of insertion in channel ……….... 50 – 200 mm (2 – 8 in.)
Dimensions (H x W x D) ……….…...… 80 x 80 x 55 mm
(3.15 x 3.15 x 2.17 in.)

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