Siemens Thermistor, -20°C Min, +70°C Max

Subtotal (1 unit)*

£23.79

(exc. VAT)

£28.55

(inc. VAT)

Add to Basket
Select or type quantity
Temporarily out of stock
  • Shipping from 20 October 2025
Need more? Click ‘Check delivery dates’ to find extra stock and lead times.
Units
Per unit
1 +£23.79

*price indicative

RS Stock No.:
287-8899
Mfr. Part No.:
QAP1030/UFH / S55720-S289
Brand:
Siemens
Find similar products by selecting one or more attributes.
Select all

Brand

Siemens

Minimum Temperature Sensed

-20°C

Maximum Temperature Sensed

+70°C

Accuracy

±0.3 K

COO (Country of Origin):
CZ

Siemens Temperature Sensor, -20 °C Minimum Temperature Sensed, +70 °C Maximum Temperature Sensed - QAP1030/UFH


This temperature sensor is an essential component for effective monitoring in both electrical and hydronic underfloor heating systems. Designed with a 4m 2-wire cable length, it features an NTC sensing element that accurately detects temperatures within a Its robust construction makes it ideal for integration with controllers or room thermostats to ensure safe and efficient heating performance.

Features & Benefits


• NTC sensor technology provides precise temperature measurement
• Wide operating range from -20 to +70°C for versatile use
• 2-wire cable simplifies installation and connectivity
• Measuring accuracy of ±0.3 K ensures reliable performance
• Suitable for use with non-galvanically separated AC 230V systems
• Includes protective ferrules to enhance durability during installation

Applications


• Used in underfloor heating systems requiring temperature monitoring
• Integrated with controllers for precise temperature regulation
• Applied in various industrial settings demanding accurate temperature control
• Installed in protective tubes for easy future replacements

How does the sensor ensure accurate temperature readings in underfloor heating systems?


The NTC sensing element adjusts its resistance based on temperature, allowing for precise readings. This responsive mechanism guarantees that floor temperatures are consistently monitored, aiding in effective heating control.

What installation considerations should be taken into account when using this sensor?


It is important to run the cable from the controller to the sensing element without any electrical mat interference. Positioning the sensing element a minimum of 60cm from walls ensures better measurement accuracy, avoiding heat traps caused by furniture.

Can this sensor be effectively used in standard home heating systems?


Yes, it is appropriate for both residential and industrial applications, as the design accommodates a wide Its compatibility with specific controllers makes it versatile for various environments requiring temperature regulation.

Related links