Waterproof Temperature Sensor - Thermal Thermistor NTC 10K Probe Sensor

Waterproof Temperature Sensor (Thermal Thermistor NTC 10K Probe Sensor) is a robust, moisture-resistant temperature-sensing probe designed for harsh environments, liquid immersion, and industrial thermal monitoring. Featuring a high-precision 10K Negative Temperature Coefficient (NTC) thermistor sealed inside a stainless steel cylindrical shell, this probe delivers reliable and accurate temperature readings in water, oils, chemicals, and damp atmospheres. Paired with a long insulated cable, it is widely utilized in water heaters, aquariums, solar thermal systems, and microcontroller-based agricultural automation.

Features

• Waterproof stainless steel probe housing designed for direct liquid immersion and corrosive environments
• High-precision 10K NTC thermistor core offering stable and repeatable thermal response
• Sealed with high thermal-conductivity epoxy resin to ensure rapid heat transfer and prevent moisture ingress
• Long, flexible insulated cable allowing remote placement away from control electronics
• Wide temperature measurement range spanning from sub-zero conditions up to high thermal limits
• Universal compatibility with standard microcontroller analog input pins (Arduino, ESP32, Raspberry Pi)
• Easy integration with thermistor calculation formulas (Steinhart-Hart equation or lookup tables)
• Durable, rust-resistant construction suitable for long-term outdoor and industrial deployment

Applications

• Aquarium temperature monitoring, fish tank thermostats, and hydroponic nutrient solution tracking
• Solar water heater tanks, boiler temperature controls, and domestic water geysers
• Agricultural greenhouse climate monitoring, soil temperature logging, and poultry incubator systems
• Industrial machinery cooling jacket monitoring and HVAC duct temperature testing
• Polytechnic diploma, university engineering thesis, and Arduino/ESP32 IoT environmental projects

Important Notes:

• Circuit Requirement: An NTC thermistor is a variable resistor, not a digital sensor; you must wire it in a voltage divider circuit with a fixed reference resistor (e.g., a 10k$\Omega$ 1% resistor) connected to the microcontroller's analog input (ADC) pin.
• While the stainless steel tip and cable are waterproof, avoid exposing the bare wire terminal ends or connection junctions to direct moisture or submersion.
• Do not exceed 105°C continuous operating temperature to prevent degradation of the internal wire insulation and epoxy seal.
• Ensure proper thermal paste application if inserting the metal probe into a dry thermowell or surface-mounting block for faster response times.

Package includes

• 1 x Waterproof Temperature Sensor (NTC 10K Probe, 1-Meter Cable)