Honeywell T7414A, WPF20A, VF20A PRODUCT DATA
T7414A / VF20A / WPF20A
GENERAL
The T7414A/VF20A/WPF20A Strap-on Temperature Sensors
are used for temperature measurement on warm/hot water
pipes or solar collectors.
The sensors can be employed for hot and cold water
installations in the following control systems
• Excel 5000
• MicroniK 200
• MicroniK 100
• Excel Classic
• Excel Plus
• High Performance Excel Plus
• Excel EMC
or other systems using PT1000 or NTC 20kΩ temperature
sensing elements.
STRAP-ON
TEMPERATURE SENSORS
PRODUCT DATA
FEATURES
• PT1000 or NTC 20kΩ temperature sensing element
• Wide sensing range
• High accuracy
Models
OS no. description sensing range
T7414A1008
VF20A
WPF20A
Strap-on PT1000
Temperature Sensor
Strap-on NTC20kΩ
Temperature Sensor
Two strap-on NTC20kΩ
Temperature Sensors
SPECIFICATION
Nominal value
PT1000 1000 Ω at 0 °C
NTC20kΩ 20 kΩ at 25 °C
Accuracy
PT1000 IEC751 Class B
0.3 K +0.5% • |t| (t in °C)
NTC20kΩ 0.3 K at 25 °C
Sensitivity
PT1000 ≈ 3.85 Ω / K
NTC20kΩ ≈ -934.5 Ω / K at 25 °C (non-linear)
τ
Response time
Electrical connection
T7414A/VF20A terminals for 2 x 1.5 mm² cable
WPF20A terminals for 4 x 1.5 mm² cable
Ambient Limits (wiring box)
Transport and -35...+70 °C (-31...+158 °F)
storage temperature
Humidity 5…95% r.h., non-condensing
Safety (terminal box)
Protection standard IP54 as per EN60529 (T7414)
IP30 (VF20, WPF20)
Flame retardant V1 as per UL94, Plastic (PC)
Housing
Dimensions See Fig. 1 on page 2
Weight 100 g
≈ 1 minute
0.5
0...+110 °C
(+32...+230 °F)
0...+110 °C
(+32...+230 °F)
0...+110 °C
(+32...+230 °F)
® U.S. Registered Trademark EN0B-0364GE51 R0608
Copyright © 2008 Honeywell Inc. • All rights reserved
T7414A / VF20A / WPF20A STRAP-ON TEMPERATURE SENSORS
DIMENSIONS
50
(1.97)
65
(2.55)
33
(1.3)
max. diameter 110
(4.25)
tightening strap
7 (0.28)
Fig. 1. Dimensions of T7414A / VF20A / WPF20A in mm (inches)
INSTALLATION
wiring run max. length
Sensor to controller 200 m (660 ft)
Offset (at PT1000 sensors, only) due to wire resistance per
10 m of distance from sensor to controller:
type of wire temperature offset PT1000
0.5 mm2 (AWG20) 0.18 °C (0.324 °F)
1.0 mm2 (AWG17) 0.09 °C (0.162 °F)
1.5 mm2 (AWG15) 0.06 °C (0.108 °F)
NOTE: Use shielded wiring in areas with high EMI.
Keep 15 cm (5.9’’) minimum distance between
sensor lines and 230 Vac power lines.
case hole diameter
allows Pg9 cable
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
71101 Schönaich / Germany
Phone: (49) 7031 63701
Fax: (49) 7031 637493
http://ecc.emea.honeywell.com
Subject to change without notice. Printed in Germany
EN0B-0364GE51 R0608
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