Honeywell WPF20, VF20, T7413A PRODUCT DATA

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.

T7413A / VF20 / WPF20

IMMERSION TEMPERATURE SENSOR

PRODUCT DATA

FEATURES

• PT1000 or NTC20kΩ temperature sensing element

• Wide sensing range

• High accuracy

• Choice of two different immersion well lengths

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)

Response time

τ

with brass well

with stainless steel well

Electrical connection

T7413A/VF20 terminals for 2 x 1.5 mm² cable
WPF20 terminals for 3 x 1.5 mm² cable

Ambient limits (housing)

storage temperature -35...+70 °C (-31...+158 °F

Safety (terminal box)

Protection standard IP54 (T7413A)
IP52 (VF20/WPF20)

Flame retardant V1 as per UL94, Plastic (PC)
Dimensions See page 3

≈ 18 s (with immersion well)

0.5

τ

≈ 30 s (with immersion well)

0.5

)

® U.S. Registered Trademark EN0B-0363GE51 R0907
Copyright © 2007 Honeywell Inc. • All rights reserved

T7413A / VF20 / WPF20 IMMERSION TEMPERATURE SENSORS

S

Models

OS-no. sensor type

VF20T 185 (7.28) 152 (5.98) VFHT

VF20L

VF20NT 185 (7.28) 152 (5.98) VFNT

VF20LN

T7413A1009 -25...+130 °C 193 (7.59) 160 (6.29) VFHT

T7413A1041 185 (7.28) 152 (5.98)

T7413A1058

WPF20T 185 (7.28) 152 (5.98) VFHT

WPF20L

*When a stainless steel immersion well is used. Maximum permitted temperature: 150 °C.

NTC 20 kΩ

PT1000

NTC 20 kΩ (two sensors)

sensing

range

-25...+130 °C

-25...+130 °C*

-25...+130 °C*

-25...+130 °C

length in mm (inches)

L1 T1

338 (13.30) 305 (12.00) VFL

338 (13.30) 305 (12.00) VFLN

338 (13.30) 305 (12.00)

338 (13.30) 305 (12.00) VFL

immersion

not included

well

Immersion Well

OS-no. length mm (inch) T2 immersion well P

VFHT 135 (5.31) 8 m/s

VFL 300 (11.81)

VFNT 135 (5.31) 15 m/s

VFLN 300 (11.81)

brass, R1/2” / BSP1/2”, PN16 15 bar

stainless steel, R1/2” / BSP1/2” PN25 25 bar

max. flow rate

max

3 m/s

6 m/s

DIMENSIONS

50 (1.97)

L1

6 (0.23)

33 (1.3)

65

(2.55)

T1

7 (0.28)

Fig. 1. Immersion temperature sensor, dimensions in mm (inches)

case hole diameter

allows Pg9 cable

W 22

12

(0.47)

T2

Fig. 2. Immersion wells, dimensions in mm (inches)

25 (0.98)

EN0B-0363GE51 R0907 2