{"product_id":"waterproof-ntc-50k-b3950-thermistor-temperature-sensor-wire-probe","title":"Waterproof NTC 50K Thermistor Temperature Sensor Probe Wire","description":"\u003cp\u003eMeet your next go-to component for precise, reliable temperature measurement — the \u003cstrong\u003eWaterproof NTC 50K (B: 3950) Thermistor Temperature Sensor Wire Probe\u003c\/strong\u003e. Designed for engineers, hobbyists, and makers alike, this compact sensor delivers accurate, stable readings in a range of environments. Available in \u003cstrong\u003e2 color options\u003c\/strong\u003e and three cable lengths (13 cm, 40 cm, and 100 cm), it's easy to integrate into your project exactly the way you need it.\u003c\/p\u003e\n\n\u003ch2\u003eKey Features\u003c\/h2\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eNTC 50K Thermistor (B: 3950):\u003c\/strong\u003e Delivers high-accuracy temperature sensing with a negative temperature coefficient — resistance decreases as temperature rises, giving you a consistent, predictable signal.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWaterproof Construction:\u003c\/strong\u003e The sealed probe head shrugs off moisture, splashes, and condensation, making it suitable for both indoor and outdoor applications.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eFixed Mounting Hole:\u003c\/strong\u003e The integrated mounting hole allows for secure, permanent installation in enclosures, appliances, or custom rigs without additional hardware.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eFlexible Cable Lengths:\u003c\/strong\u003e Choose from 13 cm, 40 cm, or 100 cm wire lengths to suit your wiring layout — no awkward cutting or splicing required.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWide Application Range:\u003c\/strong\u003e Perfect for home appliances, aquarium controllers, 3D printer heated beds, HVAC systems, constant-temperature equipment, and DIY electronics projects.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003ePlug-and-Play Ready:\u003c\/strong\u003e No additional calibration needed out of the box — just connect and start reading.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eSpecifications\u003c\/h2\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eType:\u003c\/strong\u003e NTC Thermistor\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eResistance:\u003c\/strong\u003e 50K Ω at 25°C\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eB Value:\u003c\/strong\u003e 3950 K\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCable Lengths:\u003c\/strong\u003e 13 cm \/ 40 cm \/ 100 cm\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eColor Options:\u003c\/strong\u003e 2 available\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWaterproof:\u003c\/strong\u003e Yes (sealed probe)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMounting:\u003c\/strong\u003e Fixed mounting hole included\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eIdeal For\u003c\/h2\u003e\n\u003cul\u003e\n  \u003cli\u003eHome appliance temperature control systems\u003c\/li\u003e\n  \u003cli\u003e3D printer heated bed monitoring\u003c\/li\u003e\n  \u003cli\u003eAquarium and terrarium temperature management\u003c\/li\u003e\n  \u003cli\u003eHVAC and constant-temperature systems\u003c\/li\u003e\n  \u003cli\u003eDIY electronics and Arduino\/Raspberry Pi projects\u003c\/li\u003e\n  \u003cli\u003eIndustrial and laboratory measurement setups\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eWhether it's a component upgrade for a professional build or a handy addition to your maker toolkit, this thermistor sensor delivers consistent performance you can count on.\u003c\/p\u003e\n\n\u003cp\u003eFor further reading on thermistor-based temperature sensing and electronic measurement standards, visit the National Institute of Standards and Technology (NIST) – Thermometry.\u003c\/p\u003e\n\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003ch4\u003eQ: What does NTC 50K B 3950 mean on a thermistor temperature sensor?\u003c\/h4\u003e\n\u003cp\u003eA: NTC stands for Negative Temperature Coefficient, meaning the sensor's resistance decreases as temperature increases. \"50K\" refers to its resistance value of 50,000 ohms (50 kΩ) at 25°C, and \"B 3950\" is the B-constant (or beta value) that describes the relationship between resistance and temperature — a critical parameter for accurate temperature calculations in your circuit.\u003c\/p\u003e\n\n\u003ch4\u003eQ: Is this waterproof thermistor sensor suitable for use in aquariums or wet environments?\u003c\/h4\u003e\n\u003cp\u003eA: Yes. The probe head is fully sealed and waterproof, making it suitable for humid or wet environments such as aquariums, condensation-prone enclosures, or outdoor installations. Always ensure the cable connections are properly insulated for fully submerged applications.\u003c\/p\u003e\n\n\u003ch4\u003eQ: Which cable length should I choose — 13 cm, 40 cm, or 100 cm?\u003c\/h4\u003e\n\u003cp\u003eA: Choose based on the distance between your sensor mounting point and your controller board or terminal. For compact enclosures or nearby components, 13 cm works well. The 40 cm option suits mid-range setups such as 3D printers or appliance interiors. The 100 cm cable is ideal for longer runs, wall-mounted panels, or large equipment where the sensor is far from the control unit.\u003c\/p\u003e\n\n\u003ch4\u003eQ: Can I use this thermistor with an Arduino or Raspberry Pi?\u003c\/h4\u003e\n\u003cp\u003eA: Absolutely. This NTC 50K B 3950 thermistor is a popular choice for microcontroller projects. Simply connect it in a voltage divider circuit with a known resistor, read the analog voltage output, and apply the Steinhart-Hart equation (or a simplified B-parameter formula) to calculate the temperature. Many open-source libraries support NTC thermistors directly.\u003c\/p\u003e\n\n\u003cscript type=\"application\/ld+json\"\u003e{\"@context\": \"https:\/\/schema.org\", \"@type\": \"FAQPage\", \"mainEntity\": [{\"@type\": \"Question\", \"name\": \"What does NTC 50K B 3950 mean on a thermistor temperature sensor?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"NTC stands for Negative Temperature Coefficient, meaning the sensor's resistance decreases as temperature increases. \\\"50K\\\" refers to its resistance value of 50,000 ohms (50 kΩ) at 25°C, and \\\"B 3950\\\" is the B-constant (or beta value) that describes the relationship between resistance and temperature — a critical parameter for accurate temperature calculations in your circuit.\"}}, {\"@type\": \"Question\", \"name\": \"Is this waterproof thermistor sensor suitable for use in aquariums or wet environments?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"Yes. 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