{"product_id":"jandy-zodiac-aqualink-temperature-sensor-for-water-or-air-7785","title":"Zodiac Jandy Zodiac Aqualink Temperature Sensor for Water or Air - 7784 7785 7790 - Genuine","description":"\u003ch3\u003eZodiac Jandy Zodiac Aqualink Temperature Sensor for Water or Air - 7784 7785 7790 - Genuine\u003c\/h3\u003e\u003cp\u003eGenuine Jandy® \/ Zodiac® \/ Aqualink RS temperature sensor for \u003cstrong\u003eair\u003c\/strong\u003e, \u003cstrong\u003ewater\u003c\/strong\u003e, or \u003cstrong\u003esolar\u003c\/strong\u003e temperature sensing on compatible control systems using this sensor. This is not the cheap Chinese aftermarket sensor sold on other websites. Cheap versions fail prematurely.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\u003cspan style=\"color: rgb(43, 0, 255);\"\u003e\u003cstrong\u003ePhysically Stocked, unlike most \"drop-shipping\" websites.\u003c\/strong\u003e\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan style=\"color: rgb(43, 0, 255);\"\u003e\u003cstrong\u003eShipped from VIC, NSW, WA, QLD\u003c\/strong\u003e\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eCommonly searched and sold under part numbers \u003cstrong\u003e7784\u003c\/strong\u003e, \u003cstrong\u003e7785\u003c\/strong\u003e, and \u003cstrong\u003e7790\u003c\/strong\u003e. In the official Jandy sensor family, \u003cstrong\u003e7790\u003c\/strong\u003e is the common 15ft \/ 4.5m version.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eCan be purchased with new clamp, or just sensor \u0026amp; o-ring.\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eThese commonly corrode, crack, drift out of range, or fail altogether over time, causing incorrect temperature readings, no temperature reading, or erratic heater \/ solar operation.\u003c\/p\u003e\n\u003ch3\u003eCommon Part Numbers \/ Search Terms\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e7790\u003c\/li\u003e\n\u003cli\u003e7784\u003c\/li\u003e\n\u003cli\u003e7785\u003c\/li\u003e\n\u003cli\u003e7786\u003c\/li\u003e\n\u003cli\u003e7791\u003c\/li\u003e\n\u003cli\u003eR3002900\u003c\/li\u003e\n\u003cli\u003eJandy temperature sensor\u003c\/li\u003e\n\u003cli\u003eZodiac temperature sensor\u003c\/li\u003e\n\u003cli\u003eAqualink temperature sensor\u003c\/li\u003e\n\u003cli\u003eAqualink RS sensor\u003c\/li\u003e\n\u003cli\u003eair temperature sensor\u003c\/li\u003e\n\u003cli\u003ewater temperature sensor\u003c\/li\u003e\n\u003cli\u003esolar temperature sensor\u003c\/li\u003e\n\u003cli\u003e10K thermistor sensor\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eFeatures\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e10K ohm thermistor sensor\u003c\/li\u003e\n\u003cli\u003eApprox. 15ft \/ 4.5m lead on the common 7790-style version\u003c\/li\u003e\n\u003cli\u003eSuitable for air, water, or solar temperature sensing on compatible systems\u003c\/li\u003e\n\u003cli\u003eAvailable as sensor \u0026amp; o-ring only, or sensor with new clamp\u003c\/li\u003e\n\u003cli\u003eCommon replacement for corroded, inaccurate, open-circuit, or shorted sensors\u003c\/li\u003e\n\u003cli\u003eCable can be extended if required by a qualified technician\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eCommon Symptoms of Failure\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eIncorrect pool or spa temperature displayed\u003c\/li\u003e\n\u003cli\u003eNo temperature reading\u003c\/li\u003e\n\u003cli\u003eTemperature reading jumps around or drifts\u003c\/li\u003e\n\u003cli\u003eSolar heating not responding properly\u003c\/li\u003e\n\u003cli\u003eHeater not firing because the control system thinks the water is already at temperature\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eCommonly Used With\u003c\/h3\u003e\n\u003cp\u003eThis sensor style is commonly used with \u003cstrong\u003eJandy \/ Zodiac AquaLink RS\u003c\/strong\u003e automation systems and related setups using the same 10K sensor input. It is commonly associated with:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eAquaLink RS All Button systems\u003c\/li\u003e\n\u003cli\u003eAquaLink RS OneTouch systems\u003c\/li\u003e\n\u003cli\u003eOther AquaLink RS pool \/ spa automation systems using 10K air, water, or solar sensors\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eAustralian market note:\u003c\/strong\u003e Many buyers in Australia search these under \u003cstrong\u003eJandy\u003c\/strong\u003e, \u003cstrong\u003eZodiac\u003c\/strong\u003e, or \u003cstrong\u003eAqualink\u003c\/strong\u003e depending on the age of the system, distributor branding, and what is printed on the controller or manual.\u003c\/p\u003e\n\u003ch3\u003eHow to Test\u003c\/h3\u003e\n\u003cp\u003eThese are a \u003cstrong\u003e10K thermistor\u003c\/strong\u003e type sensor. The standard test method is to disconnect the sensor, measure resistance across the two wires with a multimeter set to ohms, and compare the reading to the actual temperature using a reliable thermometer.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003e10°C\u003c\/strong\u003e = \u003cstrong\u003e19.898 kΩ\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e15°C\u003c\/strong\u003e = \u003cstrong\u003e15.710 kΩ\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e20°C\u003c\/strong\u003e = \u003cstrong\u003e12.492 kΩ\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e21°C\u003c\/strong\u003e = \u003cstrong\u003e11.893 kΩ\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e25°C\u003c\/strong\u003e = \u003cstrong\u003e10.000 kΩ\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e30°C\u003c\/strong\u003e = \u003cstrong\u003e8.057 kΩ\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e35°C\u003c\/strong\u003e = \u003cstrong\u003e6.531 kΩ\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e40°C\u003c\/strong\u003e = \u003cstrong\u003e5.327 kΩ\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eIf the reading is \u003cstrong\u003eopen circuit\u003c\/strong\u003e, \u003cstrong\u003eshorted\u003c\/strong\u003e, or far outside the expected resistance for the actual temperature, the sensor is usually faulty and should be replaced.\u003c\/p\u003e\n\u003ch3\u003eImportant Compatibility Note\u003c\/h3\u003e\n\u003cp\u003ePlease match your existing sensor, application, and control system before ordering. While these are commonly used across AquaLink RS systems, some listings on the internet mix \u003cstrong\u003e7784\u003c\/strong\u003e, \u003cstrong\u003e7785\u003c\/strong\u003e, and \u003cstrong\u003e7790\u003c\/strong\u003e together, and different systems may use different lead lengths or mounting styles. This version can be used to replace all types. Where a longer lead is required, the wires can be spliced.\u003c\/p\u003e\n\u003ch3\u003eManufacturer Catalogues, Diagrams \u0026amp; Part Numbers\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eNeed exploded views, spare part numbers, product numbers, diagrams, or more product information? See the manufacturer catalogues:\n \u003ca href=\"https:\/\/hasp.com.au\/pages\/Astralpool_Catalogue_2026\"\u003eAstralpool Catalogue 2026\u003c\/a\u003e | \u003ca href=\"https:\/\/hasp.com.au\/pages\/Zodiac_Catalogue_2026\"\u003eZodiac Catalogue 2026\u003c\/a\u003e\n\u003c\/strong\u003e\u003c\/p\u003e","brand":"Zodiac","offers":[{"title":"Sensor - no Clamp","offer_id":43341727039677,"sku":"w7790\/w7784","price":115.0,"currency_code":"NZD","in_stock":true},{"title":"Sensor w\/ Clamp","offer_id":43341727006909,"sku":"w7790\/w7784 + 50mm SS Clamp","price":120.0,"currency_code":"NZD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0372\/5253\/files\/zodiac-jandy-aqualink-temperature-sensor-for-water-or-air-7784-7785-7790-genuine-w-clamp-control-systems-567.webp?v=1780305284","url":"https:\/\/heaterandspaparts.com.au\/en-nz\/products\/jandy-zodiac-aqualink-temperature-sensor-for-water-or-air-7785","provider":"Heater and Spa Parts","version":"1.0","type":"link"}