Sonda de Temperatura de Inmersión NTC 10 kOhm - Q-Tech® 2026

NTC 10 kOhm Immersion Temperature Sensor

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At Q-TECH, we apply the same clear rules for everyone: the law protects you, and when applied correctly, it protects us as well. By processing your purchase, you accept our General Terms and Conditions of Sale. If you are purchasing as a consumer (B2C), nothing stated herein limits the rights granted to you by mandatory law (RDL 1/2007, TRLGDCU): the 3-year legal warranty of conformity and the right of withdrawal under the terms and with the exceptions legally provided, which are detailed below. References to "B2B" apply only to businesses and professionals.

Your guarantees

  • Rights intact: 14 days of withdrawal from receipt for most products—subject to the legal exceptions you will see below, such as goods made to your specifications—and a 3-year legal warranty of conformity, under the terms of the TRLGDCU.
  • Conformity with the description: we guarantee that the equipment will correspond to the published technical description and what one could reasonably expect from it (arts. 115 et seq. TRLGDCU). Images and videos are for guidance only: the manufacturer may supply a more recent revision of the product or introduce minor aesthetic, packaging, or firmware changes, without this constituting a lack of conformity as long as the described characteristics and performance are maintained.
  • Traceability that also protects you: we document the condition, serial number, and seal of each piece of equipment upon shipment, and we video-record the opening of returns; this is your proof of the condition in which the goods were delivered.

Responsible use and your part

  • If you are thinking of returning it, keep it as you received it: without installing or activating it, with its seals, accessories, and packaging intact. This is how to ensure a full refund, without deductions.
  • Handling that exceeds inspection reduces value: handling the equipment beyond what is necessary to verify its nature and operation may result in a real, assessed, and case-by-case justified deduction (art. 108.2 TRLGDCU), never a fixed percentage. In particular: activating or registering the serial number, linking it to a manufacturer's account or app, circulating water through hydraulic equipment, unsealing probes, or installing software or consumables. Initial inspection of the product does not lead to a deduction.
  • The same item must be returned: withdrawal requires returning the supplied unit. Different equipment, or equipment with prior use, age, or wear prior to purchase, does not constitute a valid withdrawal.
  • Installation and cybersecurity, shared responsibility: this is technical hardware; you are responsible for correct installation, credentials, patches, and backups, while we deliver a compliant product. Q-TECH is not liable for damages resulting from poor installation, incorrect configuration, or omission of patches by the customer or third parties (in B2C, without prejudice to the legal warranty and liability for intent or negligence, arts. 86 and 130 TRLGDCU).
  • Delivery of bulky goods: delivery is made to the curb. B2C: transport risk is ours until physical delivery (art. 66 ter); we recommend noting visible damages on the delivery note and notifying us of breakages within 24-48 hours with photographs to activate the insurance. B2B: inspection and notation on the delivery note are mandatory; hidden damages must be reported within 24 hours (art. 366 CCom). Unjustified rejection or incorrect shipping information will entail the actual outbound and return costs (approx. €85-550 for heavy machinery).

Made to your measure (Advanced Pre-Assembly)

  • If your order includes equipment, racks, hydraulic assemblies, or technical rooms made or configured according to your specifications (permanent joints, custom cuts or wiring, parameterization, pressure testing), these are custom goods without the right of withdrawal from the conclusion of the contract (art. 103.c TRLGDCU; CJEU Case C-529/19), which is informed before purchasing and documented in the signed Order Note. A test you request without permanent modification retains your right of withdrawal, with only the actual loss of value caused by that test being deducted. Would you prefer to receive it tested, configured, and ready to connect, without assuming these risks? Contract our Advanced Pre-Assembly or the prior technical audit.

If you are purchasing as a business or professional (B2B)

  • The transaction is governed by the Commercial Code: firm sale, without the right of withdrawal; notification of defects within 4 days (apparent) / 30 days (hidden), arts. 336 and 342. Q-TECH acts as a distributor and excludes indirect damages, loss of profit, and data loss, limited to the price of the equipment, without prejudice to the manufacturer's commercial warranty.

Product warnings v1.0 · June 2026. Information summary; the complete and binding conditions are those published at q-tech.es.

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NTC 10 kOhm Immersion Temperature Sensor

The NTC 10 kOhm Immersion Temperature Sensor is an essential high-precision component designed for reliable temperature measurement in large-volume tanks. Its primary function is to provide accurate data to electronic controllers (such as the Vitosolic series) to efficiently manage Domestic Hot Water (DHW) production and auxiliary heating.

This product is designed for installers, technical services, and users who require precise, long-lasting temperature measurement in humid environments.

🛠️ Essential Applications: Measurement Reliability

Reliable temperature measurement is fundamental for energy efficiency and system protection.

  • Storage Tank Precision: Ideal for direct mounting in the DHW tank sensor well, ensuring the required comfort temperature.

  • Auxiliary Management: Essential for heating water buffer tanks, allowing the boiler to intervene only when strictly necessary.

  • Combined Systems: Perfect for combined storage tanks, where temperature differentiation is required for multiple circuits.

⚙️ Technical Features and Benefits of the NTC 10 kOhm

This component combines ease of installation with technical precision.

Compatibility and Resistance

  • NTC 10 kOhm Technology: Offers a standardized resistance-temperature curve, compatible with the vast majority of electronic controllers on the market.

  • Optimized Mounting: Specifically designed for immersion installation in the tank's sensor well, ensuring ideal thermal contact with the medium.

Ready-to-Connect Installation

  • Extended Connection Cable: Includes a 3.8-meter cable, which facilitates routing and connection to the controller, even in distant or complex installations.

  • Essential Spare Part: Key component for the maintenance and repair of thermal systems, restoring temperature reading accuracy.

Technical Note: Supplied with a 3.8 m cable, without a connector. Installation requires the professional to connect the sensor directly to the corresponding controller terminals.


📋 Technical Specifications

Crucial information for replacement and compatibility of the NTC 10 kOhm Sensor.

  • Sensor Type: Negative Temperature Coefficient (NTC) resistor

  • Resistance Value: 10 kOhm (at 25ºC)

  • Mounting Type: Immersion (for sensor well)

  • Primary Application: Temperature measurement in tank liquids

  • Cable Length: 3.8 m (380 cm)

  • Connection: No connector (direct terminal connection)

  • Compatibility: DHW storage tanks, buffer tanks, combined storage tanks.


❓ Frequently Asked Questions

Why is it important that the sensor is NTC 10 kOhm?

The 10 kOhm value is a resistance standard at 25ºC used by many boiler and solar controller manufacturers. If your equipment specifically requires an NTC 10 kOhm, using a different value (such as 20 kOhm) will result in an incorrect temperature reading, which will compromise the system's efficiency and safety.

How is this sensor installed in the tank?

This sensor is designed to be inserted into an immersion well (sleeve) pre-installed in the storage tank. The well protects the sensor from direct contact with water and allows for replacement without draining the tank. The sensor simply slides into the well and the cable connects to the controller.

What is the difference between this sensor and a contact sensor?

An immersion sensor (like this one) directly measures the water temperature inside the tank, providing the most accurate reading. A contact sensor measures the temperature of the outer surface of the pipe or tank, which is less accurate and can be affected by ambient temperature.


📞 Technical Support and Professional Assistance

If you need to verify the compatibility of this NTC 10 kOhm sensor with your control system or require assistance with component replacement, our technical team is available. Contact our specialists by phone to ensure you are purchasing the exact spare part for your installation.

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