Carel NTC015HF01 NTC 10 kΩ temperature probe with fastening clamp, 1.5 m cable

Carel NTC015HF01 is a passive NTC 10 kΩ temperature probe (β 3435) with a fastening-clamp housing, designed to measure pipe temperatures in refrigeration systems, including suction lines, evaporator outlets and condenser circuits. It features a black, flat 1.5 m cable, IP67 protection and an operating range of -50 to 105 °C. This is the shortest cable version in the series, ideal when the controller is close to the measurement point.

Features, advantages and benefits

• NTC 10 kΩ ±1% sensor at 25 °C, β (25/85) 3435 → a well-known, repeatable resistance-temperature characteristic documented in the manufacturer's table (for example, typically 27.28 kΩ at 0 °C and 10.00 kΩ at 25 °C). → A controller with an NTC 10 kΩ input converts resistance to temperature without requiring a non-standard probe configuration, and replacement with an identical model is straightforward.
• Accuracy of ±0.5 °C at 25 °C and ±1.0 °C from -50 to 90 °C → the specified accuracy covers the full typical operating range of refrigerated display cases, cold rooms and freezers. → The controller can regulate cooling and defrosting based on reliable readings, without large deviations at low temperatures.
• Operating range of -50 to 105 °C → the same probe works in refrigeration and freezing systems, as well as in locations where pipe temperatures are elevated. → One sensor type in stock can serve multiple measurement points in the equipment.
• Housing with a fastening clamp → the probe attaches directly to the pipe, without a thermowell, welding or interference with the refrigerant circuit. → This reduces installation and service time and avoids the risk of leaks in the system.
• IP67 protection rating → the sensor housing is dust-tight and protected against temporary immersion. → The probe withstands moisture and condensation found around pipes in refrigeration equipment.
• Black, flat thermoplastic-rubber cable (max. 3.6 × 1.6 mm), 1.5 m long → the cable has a UL/HB flammability rating and is long enough to wrap around the pipe at least twice and reach the controller. → The short cable is suitable when the controller is installed close to the pipe, reducing the amount of wiring inside the cabinet or condensing unit.
• Stripped wire ends, 6 ±1 mm → the wires are ready to connect to the controller terminals. → Quick connection with no additional cable preparation.
• Basic insulation rated at 250 V AC, dielectric strength of 1500 V AC, insulation resistance >20 MΩ at 500 V DC → the insulation ratings for the probe and cable are specified by the manufacturer. → This provides greater operational safety in equipment assemblies containing mains-powered devices.
• Time constant of approx. 50 s in air → the probe is designed for pipe temperature measurement, where changes occur gradually. → It provides a steady, stable reading without sudden fluctuations.

Technical data

Applications and installation

According to the manufacturer's guidelines, NTC*HF* series probes are used, among other applications, to measure suction temperature in standalone display cases and refrigerated cabinets with water-cooled condensing units, evaporator outlet temperature in centrally supplied cabinets, and condensing temperature on the pipe downstream of the condenser (before subcooling). The 1.5 m version is suitable when the controller is installed close to the measurement point.

• Press the probe's clamp against the pipe at the measurement point to ensure good thermal contact.
• Wrap the cable around the pipe at least twice, then insulate the measurement point.
• Route the probe cable separately from power cables and inductive loads. Do not place them in the same cable trays, to avoid electromagnetic interference.

For measuring air temperature inside equipment, Carel's guidelines specify other probe designs (for example, the NTC*HP* series). The NTC*HF* probe is designed for pipe mounting.

Frequently asked questions (FAQ)

How long is the cable on the NTC015HF01 probe?

The probe has a 1.5 m cable. Other cable lengths are also available in the same NTC*HF* series.

What type of sensor is used in the NTC015HF01?

It is an NTC 10 kΩ ±1% sensor at 25 °C with a β (25/85) value of 3435. Before purchasing, make sure your controller input supports this probe type.

What is the probe resistance at 0 °C and 25 °C?

According to the manufacturer's table, typical values are 27.28 kΩ at 0 °C and 10.00 kΩ at 25 °C. At -20 °C, the value is 67.77 kΩ, and at 50 °C it is 4.16 kΩ.

What is the probe's operating temperature range?

The operating range is -50 to 105 °C. Accuracy is ±0.5 °C at 25 °C and ±1.0 °C from -50 to 90 °C.

What is the probe's protection rating?

The sensor has an IP67 protection rating, and the cable is made of thermoplastic rubber with a UL/HB rating.

Is the probe suitable for measuring air temperature?

The NTC*HF* probe has a clamp housing for pipe mounting. For air temperature measurement, the manufacturer specifies other designs, such as the NTC*HP* series.

How do I install the probe on a pipe?

Attach the probe to the pipe with its clamp, wrap the cable around the pipe at least twice and insulate the measurement point. Route the cable separately from power cables.

Can the probe be used in HACCP-regulated systems?

Carel recommends using only probes it specifies for measurements relevant to food safety. Confirm the required documentation and verification with the person responsible for food safety.