Honeywell EF20 DATASHEET
EF 20
EARTH TEMPERATURE SENSOR
TECHNICAL DATA
Sensor element NTC thermistor, waterproof cast
as rod sensor
Resistance 20 kOhm at 25 °C
Operating range -20…+30 °C
Dimensions 12 mm ∅, approx. 155 mm long
Electrical connections 5 m cable, 2-core
Protection class IP 62
For technical information on the NTC thermistor, see
"Temperature Sensors" (EN0B-0476GE51).
PRODUCT DATA
GENERAL
Ground temperature sensor for use in greenhouses and other
similar applications.
ELECTRICAL CONNECTION
The wiring of the temperature sensor must be in accordance
with the overall wiring circuit diagram. The terminals are not
polarized; thus, in the event of the wires being connected in
reverse, no malfunction will occur.
® U.S. Registered Trademark EN3R-1113GE51 R0907
Copyright © 2007 Honeywell Inc. • All rights reserved
EF 20 EARTH TEMPERATURE SENSOR
Manufactured for and on behalf of the Environmental and Combustion Controls Division of Honeywell Technologies Sàrl, Ecublens, Route du Bois 37, Switzerland by its Authorized Representative:
Automation and Control Solutions
Honeywell GmbH
Böblinger Straße 17
D-71101 Schönaich
Phone: (49) 7031 63701
Fax: (49) 7031 637493
http://ecc.emea.honeywell.com
Subject to change without notice. Printed in Germany
EN3R-1113GE51 R0907
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