Applications for HVAC, Refrigeration and Appliance Spare Parts
Starlight Sensors manufactures custom NTC thermistor probe assemblies for appliance, HVAC, refrigeration and industrial temperature control applications.
An NTC thermistor probe assembly is not only a thermistor chip. The final sensor structure usually includes the NTC element, probe housing, sealing material, cable, insulation, connector or terminal. Each part affects measurement accuracy, response time, waterproof performance and long-term reliability.
If you are selecting or replacing an NTC temperature probe, our engineering team can review your working conditions, drawing or sample and suggest a suitable sensor structure.
What Is an NTC Thermistor Probe Assembly?
An NTC thermistor is a temperature-sensitive resistor whose resistance decreases as temperature increases. In practical temperature control systems, the NTC element is usually installed inside a protective probe housing and connected with cable and terminals.
The probe assembly can be designed for different media and installation methods, including air temperature measurement, water temperature measurement, metal surface contact, pipe installation, refrigeration evaporators and heating equipment.
Typical Applications
Custom NTC temperature probes are commonly used in:
- Coffee machines
- Ovens and cooking equipment
- Water heaters
- Refrigerators and freezers
- Refrigeration defrost systems
- HVAC control systems
- Cold chain equipment
- Temperature controllers
- Home appliances
- Industrial temperature control equipment
Customizable Parameters
Starlight Sensors supports customization based on your electrical and mechanical requirements.
Key parameters include:
- R25 value: such as 10K, 50K, 100K ohms at 25°C
- B value: selected according to the required resistance-temperature curve
- Resistance tolerance
- B value tolerance
- Operating temperature range
- Probe diameter and length
- Probe housing material
- Cable length
- Cable insulation material
- Connector or terminal type
- Waterproof or insulation structure
Probe Housing and Cable Options
The housing and cable design should match the real application environment.
Common probe housing options:
- Stainless steel housing
- Brass housing
- Copper housing
- Epoxy coated bead
- Glass sealed NTC element
- Threaded probe structure
- Flange or mounting bracket structure
Common cable and connector options:
- PVC cable
- Silicone cable
- Teflon cable
- High-temperature wire
- Stripped wire ends
- Terminals
- Plastic connectors
- Customized wire harness
How to Select the Right NTC Probe
Before selecting an NTC thermistor probe, it is useful to confirm the following information:
- What equipment will the sensor be used in?
- What is the working temperature range?
- Is the sensor measuring air, water, metal surface, oil or refrigerant environment?
- What response time is required?
- What R25 and B value does the control circuit require?
- What probe size and installation method are needed?
- Does the sensor need waterproof, moisture-resistant or oil-resistant structure?
- What cable length and connector type are required?
- What annual quantity or sample quantity is expected?
These details help avoid temperature deviation, slow response, poor sealing or unstable long-term performance.
Technical Specification Reference
| Item | Custom Options |
|---|---|
| Sensor type | NTC thermistor |
| R25 value | 10K, 50K, 100K or customized |
| B value | Customized according to control circuit |
| Tolerance | ±1%, ±2%, ±3%, ±5% or customized |
| Operating temperature | Depends on chip, housing and cable material |
| Housing material | Stainless steel, brass, copper, epoxy, glass |
| Cable material | PVC, silicone, Teflon, high-temperature wire |
| Connector | Terminal, plastic connector or customized |
| Application | Appliance, HVAC, refrigeration, water heater, industrial control |
Request a Custom NTC Probe
Send us your working temperature, R25/B value, probe housing, cable length, connector type and application details. We can help review the sensor structure and provide a suitable NTC thermistor probe assembly for testing or production.
For refrigeration and evaporator defrost applications, see our custom refrigeration defrost temperature sensor solution: https://www.starlightsensors.com/refrigeration-defrost-temperature-sensor/
