NTC 50cm 10K Cabled Waterproof

50cm Cabled Waterproof 10K NTC Sensor

Heat Temperature Probe Thermistor 1% 3950 Air Conditioner Thermostat Thermometer Refrigerator Heater Oven

     This product is a ready-made temperature sensor made of a 10K NTC thermistor placed inside a 5mm x 25mm stainless steel probe and a 50cm cable. The NTC element, with a resistance of 10kΩ (±1%) at 25°C and a B25/50 value of 3950K (±1%), is potted with epoxy inside the steel sheath, which makes it waterproof. The 2-pin XH type socket with 2.54mm pitch at the other end of the cable plugs directly into thermostat and controller boards with an XH2.54 NTC input.

     The 50cm cable suits short-distance installations where the sensor measures a point right next to the board: a water tank next to the thermostat box, the inside of an incubator, a refrigerator shelf or an aquarium. The cylindrical steel probe can be immersed in water and liquids; thanks to its closed end and epoxy filling it can also be used in humid environments. The NTC has no polarity, so the direction of the wires does not matter. It measures from approximately -20°C to +105°C; the upper limit is set by the PVC insulated cable.

     It is used as a spare or additional sensor on digital thermostat boards with a 10K NTC input such as the W1209. For more distant points, the same sensor is also available on our site with 100cm, 200cm, 300cm, 5 metre and 10 metre cables, and in mounting hole (ring terminal) and M8 threaded types.

Key features:

     Stainless steel probe: The NTC element is fixed with epoxy inside a 5mm x 25mm steel sheath. The probe can be immersed in liquid and is protected against impact and moisture.

     Standard 10K, B3950 value: 10kΩ (±1%) at 25°C and B25/50 3950K (±1%) is the value expected by thermostat boards with a 10K NTC input such as the W1209.

     Plug-in socket: The 2-pin XH2.54 socket at the end of the 50cm cable plugs into the 2.54mm pitch NTC input on the board without soldering.

     Short, tidy cable: When the board and the measuring point are close, the 50cm cable gives a neat installation without excess cable; at approximately 5gr it is light.

     Non-polar 2-wire connection: An NTC is a resistor; there is no direction between the two wires; the reading does not change whichever way the two ends are connected.

Features:

• Product type: Steel probe, cabled, waterproof NTC temperature sensor
• Resistance (25°C): 10kΩ
• Resistance tolerance: ±1%
• B value (B25/50): 3950K
• B value tolerance: ±1%
• Measuring range: approximately -20°C - +105°C (upper limit set by the PVC cable)
• Element type: NTC thermistor; resistance decreases as temperature rises
• Output: 2-wire, non-polar (resistance output)
• Connector: 2-pin XH2.54 female socket, 2.54mm pitch
• Compatible devices: W1209 and similar digital thermostat and temperature controller boards with a 10K NTC input; analog input of Arduino, ESP32 and similar boards (with a 10kΩ voltage divider)
• Waterproofing: The NTC element is potted with epoxy inside the steel sheath
• Thermal dissipation constant: approximately 5mW/°C
• Insulation resistance: over 100MΩ
• Options: 100cm, 200cm, 300cm, 5 metre, 10 metre cable, mounting hole and M8 threaded types are sold separately
• Material: Stainless steel probe, PVC insulated cable, epoxy filling
• Colour: Silver probe, black cable, white socket
• Probe dimensions: 5mm x 25mm (diameter x length)
• Cable length: 50cm
• Weight: approximately 5gr

Usage information:

• Plug the XH2.54 socket into the NTC input of the thermostat or controller board. The board must be set for a 10K NTC, B3950; on a board expecting a different value the reading will drift.
• When reading with a board's analog input, build a voltage divider by connecting the sensor in series with a fixed 10kΩ resistor. At 25°C the midpoint voltage is half of the supply voltage; calculate the temperature with the 10kΩ and 3950K values.
• For liquid measurement, immerse the steel probe fully in the liquid. For surface measurement, lay the probe on the surface with thermal paste and fix it with a clamp or aluminium tape.
• If the board has to be placed farther than 50cm from the measuring point, choose a longer cable type instead of extending the cable.

Application areas:

•  Aquarium water temperature measurement and heater control
•  Incubator temperature control
•  Greenhouse, soil and seedbed temperature
•  Refrigerator, deep freezer and cold room temperature monitoring
•  Combi boiler and radiator pipe temperature monitoring
•  Water heater and solar water heater tank temperature
•  Air conditioner and heat pump temperature measurement
•  Spare sensor for W1209 and similar digital thermostat boards
•  Battery pack and power supply temperature monitoring
•  Temperature measuring circuits with Arduino and ESP32
   

Points to consider:

•  The upper limit of the measuring range is approximately +105°C. At hotter points such as ovens, stoves and exhausts the PVC cable and epoxy are damaged; it is not suitable for these places.
•  Use the sensor only with boards set for a 10K NTC, B3950. On an input expecting a 5K or 100K NTC or a different B value, the reading will be wrong.
•  Only the steel probe and epoxy filling are waterproof; the XH2.54 socket and the cable end are not water resistant. Keep the socket out of the wet area.
•  Do not bend the cable sharply at the probe exit and do not pull on it; the seal between the epoxy filling and the cable may be damaged.
•  Suitability of the probe and epoxy for contact with food or drinking water is not certified. Do not immerse directly in food.

Package contents:

•  1 Piece Cabled 10K NTC Sensor 50cm
•  1 Piece XH2.54 socket ( Assembled )
•  Note: Thermostat or controller board is not included in the package.