Honeywell ALF21, ALF31, TF21, TF31, KF21 DATASHEET

ALF, TF, KF, and RF

High-Accuracy Immersion, Duct, Room, and Surface Temperature Sensors

ALF KF

TF RF

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)
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

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.

® U.S. Registered Trademark

Copyright © 2005 Honeywell Inc.

All Rights Reserved

MODELS

						sensor temp.
	OS no.			description				sensor
						range
	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

EN0B-0472GE51 R0105

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).

66

35

PG11	0.5

Special surface sensor elastically supported

			33
								e
							ip
						p
				r				m
			fo
			r		5		m
		te
		e		2
			.1
	m ..
ia		8
d		1

Fig. 3. ALF21, ALF31 dimensions (in mm)

1				2		3
	Fig. 1. 1 x 3-wire circuit

6 58

PG11	35
	64

COMPATIBILITY

Fig. 4. RF21, RF31 dimensions (in mm)

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.

DIMENSIONS

64x58

35

PG11

6

TF21/31 = 150 mm

KF21/31 = 250 mm

Fig. 2. TF21, TF31, KF21, KF31 housing dimensions (in mm)

ACCESSORIES

3.2

5.1 19.5

2.5

8

Fig. 5. KF21, KF31 mounting flange dimensions (in mm)

G1/2	SW27
8
150 mm	14
EL	M4
EL+13

pressure rating for immersion well PN25

Fig. 6. TF21, TF31 immersion well dimensions (in mm)

Fema Controls Honeywell GmbH

P.O. Box 1254 D-71099 Schönaich

Phone: [phone] Fax: [phone] http:/honeywell.de/fema

Subject to change without notice. Printed in Germany

Manufacturing location certified to

EN0B-0472GE51 R0105