Honeywell T7425A, T7425B User Manual
GENERAL
The T7425A,B Immersion Temperature Sensor is used in
heating, cooling or domestic hot water applications requiring
fast response temperature measurement.
TYPES
OS no. Description Sensing range
T7425A1005
T7425A1013
T7425A1021
T7425B1011
T7425B1029
sensor element: NTC20kΩ
sensor length: 75 mm
sensor element: NTC20kΩ
sensor length: 220 mm
sensor element: NTC20kΩ
sensor length: 300mm
sensor element: PT1000
sensor length: 75 mm
sensor element: PT1000
sensor length: 220 mm
-20...+140 °C
(-4...+284 °F)
-20...+140 °C
(-4...+284 °F)
-20...+140 °C
(-4...+284 °F)
-20...+300 °C
(-4...+572 °F)
-20...+300 °C
(-4...+572 °F)
T7425A,B
IMMERSION TEMPERATURE SENSOR
PRODUCT DATA
FEATURES
• Fast response time
• Operating range of
-20...+140 °C (T7425A) or
-20...+300 °C (T7425B)
• Easy installation
• Adjustable well length
• Stainless steel body material
SPECIFICATIONS
Nominal value
T7425A (NTC20kΩ) 20 kΩ at 25 °C
T7425B (PT1000) 1000 Ω at 0 °C
Accuracy
T7425A (NTC20kΩ) 0.3 K +1% • |t - 25 °C| (t in °C)
T7425B (PT1000) IEC751 Class B
Sensitivity
T7425A (NTC20kΩ) ≈ -934.5 Ω / K at 25 °C (non-linear)
T7425B (PT1000) ≈ 3.85 Ω / K
Response time
Well
Pressure rating PN16 (nominal)
Maximum medium velocity
75 mm length 20 m/s
220 mm length 10 m/s
300 mm length 7 m/s
Medium Mineral and synthetic oil,
Material Stainless steel, 1.4571
Dimensions ø 4 mm, length ~ 75/220/300 mm
Outlet size R1/2“
Tightening torque 10 ±2 Nm, 10-mm wrench
Cable
Length 2.5 m
Protection class IP 65
0.3 K +0.5% • |t| (t in °C)
τ
= 2 seconds (T7425A)
0.5
τ
= 2.5 seconds (T7425B)
0.5
glycol-water mixture, domestic
hot water, swimming pool water
EN0B-0117GE51 R0902
107157280
T7425A,B
ELECTRICAL CONNECTION
The wiring of the temperature sensor must be in
accordance with the overall wiring circuit diagram. The
terminals are not polarized; thus, even if the wires are
connected in reverse, no malfunction will occur.
DIMENSIONS
75 or 220 or 300
41 or 186 or 266
10 Nm
SW10
PTFE
SW22
16
R 1/2”
40
25/170/250
Control Products
Honeywell AG
Böblinger Straβe 17
D-71101 Schönaich
Phone: (49) 7031 63701
Fax: (49) 7031 637493
http://europe.hbc.honeywell.com
Subject to change without notice. Printed in Germany Manufacturing location certified to
EN0B-0117GE51 R0902
107157280
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