Honeywell ALF21, ALF31, TF21, TF31, KF21 DATASHEET
...
ALF, TF, KF, and RF
High-Accuracy Immersion, Duct, Room, and Surface Temperature Sensors
PRODUCT DATA AND MOUNTING INSTRUCTIONS
SPECIFICATIONS
Nominal value
PT100 100 Ω at 0 °C
PT1000 1000 Ω at 0 °C
Accuracy
PT-sensors IEC751 Class A
±(0.15 K +0.2% • |t|) (t in °C)
ALF KF
RFTF
FEATURES
• Cost-effective universal temperature sensors.
• High accuracy due to Class A restrictions.
• High protection class (IP65).
• Duct and immersion sensors including immersion well
and/or mounting flange.
• Easy installation.
• Universal solution for industry and HVAC.
GENERAL
The ALF, TF, KF, and RF temperature sensors are designed
for universal use in machine construction, process control,
HVAC, as well as for environmental and agricultural
applications. Cost-effective and highly accurate sensor
technology allows use in a wide field of applications where
PT100 and PT1000 sensor technology is a standard.
Sensitivity
PT100 ≈ 0.385 Ω / K
PT1000 ≈ 3.85 Ω / K
Electrical Data
Measuring current 1mA
Insulation resistance ≥ 100 MΩ at 20°C (500 Vdc)
Circuit type 3-wire connection
Cable connection via PG11 and screw terminals
Protection Class
Protection class IP65
MODELS
OS no. description
ALF21 surface sensor -30...+110 °C PT100
ALF31 surface sensor -30...+110 °C PT1000
TF21 immersion sensor* -30...+150 °C PT100
TF31 immersion sensor* -30...+150 °C PT1000
KF21 air duct sensor* -30...+150 °C PT100
KF31 air duct sensor* -30...+150 °C PT1000
RF21 room sensor -50...+80 °C PT100
RF31 room sensor -50...+80 °C PT1000
*Temperature range of plastic housing: -35...+80 °C
sensor temp.
range
sensor
® U.S. Registered Trademark EN0B-0472GE51 R0105
Copyright © 2005 Honeywell Inc.
All Rights Reserved
ALF, TF, KF, and RF High-Accuracy Immersion, Duct, Room, and Surface Temperature Sensors
ELECTRICAL CONNECTION
Wire the temperature sensor in accordance with the overall
wiring circuit diagram. The terminals are insensitive to
polarity; thus, even if the wires are connected in reverse, no
malfunction will occur. In order to minimize the influence of
EMC, keep wiring to the controller as short as possible. ALF,
TF, KF, and RF sensor series are 3-wire types and thus
compensate the influence of cable lengths. However, if the
controller does not support 3-wire connection, they can also
be used in a 2-wire manner (connect 1-3).
3
1
2
Fig. 1. 1 x 3-wire circuit
COMPATIBILITY
All PT1000 sensors can be used together with SmartTemp
evaluation module TST...EPT1K.
All sensors can be used together with the APT600 and
APT650 programmable temperature displays.
66
PG11
Fig. 3. ALF21, ALF31 dimensions (in mm)
58
PG11
Fig. 4. RF21, RF31 dimensions (in mm)
ACCESSORIES
3.2
5.1
35
0.5
Special surface sensor
elastically supported
64
33
e
p
i
p
r
m
o
f
m
r
e
5
t
2
e
1
.
m
.
.
a
i
8
d
1
6
35
19.5
DIMENSIONS
64x58
35
PG11
Fig. 2. TF21, TF31, KF21, KF31 housing dimensions
Fema Controls
Honey
well GmbH
P.O. Box 1254
D-71099 Schönaich
Phone: (49) 7031-637-02
Fax: (49) 7031-637-850
http:/honeywell.de/fema
Subject to change without notice. Printed in
EN0B-0472GE51 R0105
6
(in mm)
TF21/31 = 150 mm
KF21/31 = 250 mm
Germany Manufacturing location certified to
2.5
8
Fig. 5. KF21, KF31 mounting flange dimensions (in mm)
SW27
G1/2
8
150 mm
EL
EL+13
pressure rating for immersion well PN25
Fig. 6. TF21, TF31 immersion well dimensions (in mm)
14
M4
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