{"product_id":"copper-head-ac-temperature-sensor-5k-to-100k-5pcs","title":"5pcs 5K 10K 15K 20K 25K 50K 100K air conditioning temperature sensor Cooper Head","description":"\u003cdiv class=\"ac-sensor-intro\"\u003e\n\u003cp\u003e\u003cstrong\u003eCopper-head NTC temperature sensors built for air conditioner coil \u0026amp; pipe sensing.\u003c\/strong\u003e Copper bullet tip reacts faster than epoxy heads, which makes it the right choice for evaporator and condenser tube temperature detection.\u003c\/p\u003e\n\n\u003cul\u003e\n\t\u003cli\u003e\n\u003cstrong\u003e7 resistance values in one set:\u003c\/strong\u003e 5K, 10K, 15K, 20K, 25K, 50K, 100K\u003c\/li\u003e\n\t\u003cli\u003e\n\u003cstrong\u003eSensor type:\u003c\/strong\u003e NTC thermistor, negative temperature coefficient\u003c\/li\u003e\n\t\u003cli\u003e\n\u003cstrong\u003eHead material:\u003c\/strong\u003e copper bullet, 6 × 15 mm (confirm before ordering)\u003c\/li\u003e\n\t\u003cli\u003e\n\u003cstrong\u003eTolerance:\u003c\/strong\u003e ±1% \/ ±3% \/ ±5% (confirm with listing)\u003c\/li\u003e\n\t\u003cli\u003e\n\u003cstrong\u003eCable length:\u003c\/strong\u003e 400 mm \/ 40 cm, 2-wire lead\u003c\/li\u003e\n\t\u003cli\u003e\n\u003cstrong\u003eOperating range:\u003c\/strong\u003e -40 ℃ to +125 ℃\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\n\u003ch2\u003eResistance Value Reference\u003c\/h2\u003e\n\n\u003ctable\u003e\n\t\u003cthead\u003e\n\t\t\u003ctr\u003e\n\t\t\t\u003cth\u003eRated Resistance (25 ℃)\u003c\/th\u003e\n\t\t\t\u003cth\u003eCommon B Value\u003c\/th\u003e\n\t\t\t\u003cth\u003eTypical Use\u003c\/th\u003e\n\t\t\u003c\/tr\u003e\n\t\u003c\/thead\u003e\n\t\u003ctbody\u003e\n\t\t\u003ctr\u003e\n\t\t\t\u003ctd\u003e5KΩ\u003c\/td\u003e\n\t\t\t\u003ctd\u003e3470K \/ 3950K\u003c\/td\u003e\n\t\t\t\u003ctd\u003eOlder Gree \u0026amp; Midea coil sensing\u003c\/td\u003e\n\t\t\u003c\/tr\u003e\n\t\t\u003ctr\u003e\n\t\t\t\u003ctd\u003e10KΩ\u003c\/td\u003e\n\t\t\t\u003ctd\u003e3950K\u003c\/td\u003e\n\t\t\t\u003ctd\u003eMost common — Daikin, Gree, Haier, Midea\u003c\/td\u003e\n\t\t\u003c\/tr\u003e\n\t\t\u003ctr\u003e\n\t\t\t\u003ctd\u003e15KΩ\u003c\/td\u003e\n\t\t\t\u003ctd\u003e3950K\u003c\/td\u003e\n\t\t\t\u003ctd\u003eToshiba \/ Carrier indoor units\u003c\/td\u003e\n\t\t\u003c\/tr\u003e\n\t\t\u003ctr\u003e\n\t\t\t\u003ctd\u003e20KΩ\u003c\/td\u003e\n\t\t\t\u003ctd\u003e3950K\u003c\/td\u003e\n\t\t\t\u003ctd\u003eChigo, Aux, some inverter boards\u003c\/td\u003e\n\t\t\u003c\/tr\u003e\n\t\t\u003ctr\u003e\n\t\t\t\u003ctd\u003e25KΩ\u003c\/td\u003e\n\t\t\t\u003ctd\u003e3950K\u003c\/td\u003e\n\t\t\t\u003ctd\u003eCommercial \u0026amp;light commercial units\u003c\/td\u003e\n\t\t\u003c\/tr\u003e\n\t\t\u003ctr\u003e\n\t\t\t\u003ctd\u003e50KΩ\u003c\/td\u003e\n\t\t\t\u003ctd\u003e3950K\u003c\/td\u003e\n\t\t\t\u003ctd\u003eVRF systems, heat pump water heaters\u003c\/td\u003e\n\t\t\u003c\/tr\u003e\n\t\t\u003ctr\u003e\n\t\t\t\u003ctd\u003e100KΩ\u003c\/td\u003e\n\t\t\t\u003ctd\u003e3950K \/ 4100K\u003c\/td\u003e\n\t\t\t\u003ctd\u003ePanasonic, Samsung, LG inverter boards\u003c\/td\u003e\n\t\t\u003c\/tr\u003e\n\t\u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003ch2\u003eCopper Head vs Epoxy Head — Which Do You Need?\u003c\/h2\u003e\n\n\u003ctable\u003e\n\t\u003cthead\u003e\n\t\t\u003ctr\u003e\n\t\t\t\u003cth\u003eType\u003c\/th\u003e\n\t\t\t\u003cth\u003eWhere It Goes\u003c\/th\u003e\n\t\t\t\u003cth\u003eReaction Speed\u003c\/th\u003e\n\t\t\u003c\/tr\u003e\n\t\u003c\/thead\u003e\n\t\u003ctbody\u003e\n\t\t\u003ctr\u003e\n\t\t\t\u003ctd\u003e\u003cstrong\u003eCopper head (this item)\u003c\/strong\u003e\u003c\/td\u003e\n\t\t\t\u003ctd\u003eClamped to copper pipe — coil \/ pipe temperature\u003c\/td\u003e\n\t\t\t\u003ctd\u003eFast\u003c\/td\u003e\n\t\t\u003c\/tr\u003e\n\t\t\u003ctr\u003e\n\t\t\t\u003ctd\u003eEpoxy \/ plastic head\u003c\/td\u003e\n\t\t\t\u003ctd\u003eExposed to airflow — room ambient temperature\u003c\/td\u003e\n\t\t\t\u003ctd\u003eSlower\u003c\/td\u003e\n\t\t\u003c\/tr\u003e\n\t\u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003ch2\u003eHow to Confirm the Right Resistance Before Ordering\u003c\/h2\u003e\n\n\u003col\u003e\n\t\u003cli\u003ePower off and unplug the unit, then locate the sensor clipped to the copper pipe near the coil.\u003c\/li\u003e\n\t\u003cli\u003eUnplug its connector and measure across the two wires with a multimeter set to \u003cstrong\u003e20KΩ or 200KΩ\u003c\/strong\u003e.\u003c\/li\u003e\n\t\u003cli\u003eCompare the reading at roughly 25 ℃ \/ 77 ℉ against the table above — the closest standard value is your replacement.\u003c\/li\u003e\n\t\u003cli\u003eIf the reading is unstable, jumps around, or shows OL \/ open circuit, the sensor has failed and needs replacing.\u003c\/li\u003e\n\u003c\/ol\u003e\n\n\u003ch2\u003eFAQ\u003c\/h2\u003e\n\n\u003cp\u003e\u003cstrong\u003eQ: Will a 10K sensor work if my original is 5K?\u003c\/strong\u003e\u003cbr\u003e\nNo. Swapping resistance values shifts the whole temperature curve — you will get wrong readings, short cycling, or fault codes. Always match the original rating and B value.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eQ: Why does my AC show an F0 \/ E2 \/ E4 error?\u003c\/strong\u003e\u003cbr\u003e\nThese codes on most Gree, Midea and Aux units point to coil or ambient sensor fault. Test the sensor resistance first before replacing the control board.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eQ: Can I extend the cable?\u003c\/strong\u003e\u003cbr\u003e\nYes, solder and heat-shrink any extra length, but keep total added length under 2 m to avoid signal drift on long inverter-board runs.\u003c\/p\u003e\n","brand":"DIYMars","offers":[{"title":"5K","offer_id":53511692779831,"sku":null,"price":3.99,"currency_code":"USD","in_stock":true},{"title":"10K","offer_id":53511692812599,"sku":null,"price":4.25,"currency_code":"USD","in_stock":true},{"title":"15K","offer_id":53511692845367,"sku":null,"price":4.36,"currency_code":"USD","in_stock":true},{"title":"20K","offer_id":53511692878135,"sku":null,"price":4.36,"currency_code":"USD","in_stock":true},{"title":"25K","offer_id":53511692910903,"sku":null,"price":4.36,"currency_code":"USD","in_stock":true},{"title":"50K","offer_id":53511692943671,"sku":null,"price":4.49,"currency_code":"USD","in_stock":true},{"title":"100K","offer_id":53511692976439,"sku":null,"price":4.49,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0894\/5562\/4503\/files\/57_9061e6a7-3557-48c4-a19c-24e263146e70.jpg?v=1793781971","url":"https:\/\/www.diymars.com\/pt\/products\/copper-head-ac-temperature-sensor-5k-to-100k-5pcs","provider":"DIYMars","version":"1.0","type":"link"}