Honeywell WPF20, VF20, T7413A PRODUCT DATA
T7413A / VF20 / WPF20
IMMERSION TEMPERATURE SENSOR
GENERAL
These Immersion temperature sensors are used in the following hot or cold water control systems
•Excel 5000
•MicroniK 200
•MicroniK 100
•Excel Classic
•Excel Plus
•High Performance Excel Plus
•Excel EMC
or other systems using PT1000 or NTC20kΩ temperature sensing elements.
The sensors with a stainless steel immersion well are also suitable for registering domestic water temperature.
The WPF20 are mean value sensors, for establishing the mean value using two sensors.
PRODUCT DATA
FEATURES
•PT1000 or NTC20kΩ temperature sensing element
•Wide sensing range
•High accuracy
•Choice of two different immersion well lengths
SPECIFICATION
Nominal value |
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PT1000 |
1000 Ω at 0 °C |
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NTC20kΩ |
20 kΩ at 25 °C |
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Accuracy |
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PT1000 |
IEC751 Class B |
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0.3 K +0.5% • |t| (t in °C) |
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NTC20kΩ |
0.3 K at 25 °C |
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Sensitivity |
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PT1000 |
≈ 3.85 Ω / K |
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NTC20kΩ |
≈ -934.5 Ω / K at 25 °C (non-linear) |
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Response time |
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with brass well |
τ0.5 |
≈ 18 s (with immersion well) |
with stainless steel well |
τ0.5 |
≈ 30 s (with immersion well) |
Electrical connection |
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T7413A/VF20 |
terminals for 2 x 1.5 mm² cable |
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WPF20 |
terminals for 3 x 1.5 mm² cable |
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Ambient limits (housing) |
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storage temperature |
-35...+70 °C (-31...+158 °F) |
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Safety (terminal box) |
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Protection standard |
IP54 (T7413A) |
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IP52 (VF20/WPF20) |
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Flame retardant |
V1 as per UL94, Plastic (PC) |
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Dimensions |
See page 3 |
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® U.S. Registered Trademark |
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EN0B-0363GE51 R0907 |
Copyright © 2007 Honeywell Inc. • All rights reserved |
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T7413A / VF20 / WPF20 IMMERSION TEMPERATURE SENSORS
Models
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OS-no. |
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sensor type |
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sensing |
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length in mm (inches) |
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immersion |
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range |
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L1 |
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T1 |
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well |
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VF20T |
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-25...+130 °C |
185 |
(7.28) |
152 |
(5.98) |
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VFHT |
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VF20L |
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NTC 20 kΩ |
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338 |
(13.30) |
305 |
(12.00) |
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VFL |
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VF20NT |
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-25...+130 °C* |
185 |
(7.28) |
152 |
(5.98) |
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VFNT |
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VF20LN |
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338 |
(13.30) |
305 |
(12.00) |
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VFLN |
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T7413A1009 |
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-25...+130 °C |
193 |
(7.59) |
160 |
(6.29) |
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VFHT |
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PT1000 |
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T7413A1041 |
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-25...+130 °C* |
185 |
(7.28) |
152 |
(5.98) |
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not included |
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T7413A1058 |
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338 |
(13.30) |
305 |
(12.00) |
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WPF20T |
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NTC 20 kΩ (two sensors) |
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-25...+130 °C |
185 |
(7.28) |
152 |
(5.98) |
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VFHT |
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WPF20L |
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338 |
(13.30) |
305 |
(12.00) |
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VFL |
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*When a stainless steel immersion well is used. Maximum permitted temperature: 150 °C. |
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Immersion Well
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OS-no. |
length mm (inch) T2 |
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immersion well |
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Pmax |
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max. flow rate |
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VFHT |
135 |
(5.31) |
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brass, R1/2” / BSP1/2”, PN16 |
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15 bar |
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8 m/s |
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VFL |
300 |
(11.81) |
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3 m/s |
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VFNT |
135 |
(5.31) |
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stainless steel, R1/2” / BSP1/2” PN25 |
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25 bar |
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15 m/s |
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VFLN |
300 |
(11.81) |
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6 m/s |
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DIMENSIONS
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50 (1.97) |
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L1 |
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6 (0.23) |
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33 (1.3) |
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65
(2.55)
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T1 |
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case hole diameter |
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7 (0.28) |
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allows Pg9 cable |
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Fig. 1. Immersion temperature sensor, dimensions in mm (inches)
SW 22
12
(0.47)
T2
25 (0.98)
Fig. 2. Immersion wells, dimensions in mm (inches)
EN0B-0363GE51 R0907 |
2 |
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