{"product_id":"dontek-solar-roof-hot-sensor-digital","title":"Dontek - Solar Roof\/Hot Sensor 15m\/20m\/50m Digital  (CA72, CA73\/TS01 and CA74\/TS08)","description":"\u003ch1\u003eDontek Hot Roof Sensor for Digital Solar Pool Heating Controllers (15 m, 20 m or 50 m)\u003c\/h1\u003e\n\u003ch2\u003e🏷️ Brand\u003c\/h2\u003e\n\u003cp\u003e\u003ca href=\"https:\/\/www.dontek.com.au\/\" rel=\"noopener\" target=\"_blank\"\u003eDontek\u003c\/a\u003e\u003c\/p\u003e\n\u003ch2\u003e📝 Description\u003c\/h2\u003e\n\u003cp\u003eThe Dontek CA72 (15 m), TS01 (20 m, 1131013) and TS08 (50 m, 1131024) are hot roof sensors for Dontek digital \u003ca href=\"\/collections\/pool-heating\"\u003esolar pool heating\u003c\/a\u003e controllers, including the V1, V2, V4, V5, V7, AS2 and AS3 models.\u003c\/p\u003e\n\u003cp\u003eThe roof sensor tells your controller how hot the solar collectors are, so it can decide when to run the pump and send heated water to your pool. Choose the 15 m, 20 m or 50 m cable to suit the run between your controller and the roof. Each one is a straight swap for a faulty, damaged or too-short digital roof sensor, and the 20 m and 50 m sensors sit in a heavy-duty polypropylene housing.\u003c\/p\u003e\n\u003ch2\u003e📦 Parts Included\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e1x Dontek digital hot roof sensor with 15 m, 20 m or 50 m cable, depending on the length you choose\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003e📐 Measurements\u003c\/h2\u003e\n\u003cp\u003e\u003cem\u003eMeasurements are approximate.\u003c\/em\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eCable length:\u003c\/strong\u003e 15 m, 20 m or 50 m\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight (20 m):\u003c\/strong\u003e 350 g\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight (50 m):\u003c\/strong\u003e 0.91 kg\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003e⚙️ Specifications \u0026amp; Compatibility\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBrand:\u003c\/strong\u003e Dontek\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eModel:\u003c\/strong\u003e Hot roof sensor, Digital (CA72 \/ TS01 \/ TS08)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSKU (15 m):\u003c\/strong\u003e CA72\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSKU (20 m):\u003c\/strong\u003e 1131013 \/ TS01\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSKU (50 m):\u003c\/strong\u003e 1131024 \/ TS08\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eManufacturer code (15 m):\u003c\/strong\u003e CA72 \/ HWG2G025-BK-C15\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eManufacturer code (20 m):\u003c\/strong\u003e CA73 \/ 1131013 \/ HWG2G025-BK-C20 \u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eManufacturer codes (50 m):\u003c\/strong\u003e CA74 \/ 1131024 \/ HWG2G025-BK-C50\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSensor position:\u003c\/strong\u003e Roof \/ solar collector (hot)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCable length:\u003c\/strong\u003e 15 m, 20 m or 50 m\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCable:\u003c\/strong\u003e Black twin-core, tinned copper conductors, made in Australia\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHousing:\u003c\/strong\u003e Heavy-duty polypropylene\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSuits Dontek digital controllers:\u003c\/strong\u003e V1, V2, V4, V5, V7, AS2 and AS3\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong style=\"font-size: 0.875rem;\"\u003eMatching pool (cold) sensor:\u003c\/strong\u003e\u003cspan style=\"font-size: 0.875rem;\"\u003e \u003c\/span\u003e\u003ca href=\"\/products\/swimming-pool-temperature-sensor-2-5m-cold-pool?variant=52453337465130\" style=\"font-size: 0.875rem;\"\u003eDontek 2.5 m pool (cold) sensor, Blue \/ Digital (1131018)\u003c\/a\u003e\n\u003c\/li\u003e\n\u003cli style=\"font-style: italic;\"\u003e\u003cem\u003e\u003cstrong\u003eNot suitable for Dontek Plus controllers:\u003c\/strong\u003e AS2+, AS3+ and AS5 use the \u003ca href=\"\/products\/dontek-solar-roof-hot-sensor-plus-series\"\u003ePlus roof sensor\u003c\/a\u003e (Dontek 1131015 and 1131025)\u003c\/em\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003e💡 Before You Buy\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eDigital controllers only.\u003c\/strong\u003e These are the Digital roof sensors and suit the Dontek V1, V2, V4, V5, V7, AS2 and AS3 controllers. Check the model on the front of your controller before you order.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eNot for Plus controllers.\u003c\/strong\u003e Dontek's \"Plus\" series controllers (AS2+, AS3+ and AS5) need the \u003ca href=\"\/products\/dontek-solar-roof-hot-sensor-plus-series\"\u003ePlus roof sensor\u003c\/a\u003e, not this one. That includes our \u003ca href=\"\/products\/dontek-aquasun-2-solar-controller\"\u003eAquasun 2+ solar controller\u003c\/a\u003e and the \u003ca href=\"\/products\/dontek-aquasmart-5-s-solar-controller-1012101dt\"\u003eAquasmart 5 S\u003c\/a\u003e and \u003ca href=\"\/products\/dontek-aquasmart-5-cd-solar-controller-1012104dt\"\u003eAquasmart 5 CD\u003c\/a\u003e.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eChoose your cable length.\u003c\/strong\u003e Pick the 15 m, 20 m or 50 m cable to cover the run from your controller to the roof sensor position.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePool-side sensor.\u003c\/strong\u003e The roof sensor is only half of the pair. If your pool sensor needs replacing too, see the \u003ca href=\"\/products\/swimming-pool-temperature-sensor-2-5m-cold-pool?variant=52453337465130\"\u003eDontek 2.5 m pool (cold) sensor\u003c\/a\u003e in the Blue \/ Digital version.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003e🔧 Our Tips\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eHow to test the sensor.\u003c\/strong\u003e Swap the pool and roof sensor plugs between the controller sockets. If the error follows the sensor, the sensor is faulty. If the same error stays in either socket, the controller may need repair.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCheck the plug and cable first.\u003c\/strong\u003e Poor plug connections, corrosion and loose leads cause many faults. If the cable is damaged, cut out the damaged section and re-join it, or replace the cable. Damage is not always visible, and cables that run underground can be damaged or waterlogged.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eKeep it off the gutter.\u003c\/strong\u003e Position the sensor on the roof so it does not sit in or overhang a gutter, because a sensor that reads too cold can trigger an out-of-range error.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBeware of lightning.\u003c\/strong\u003e Lightning can damage roof sensors and controllers.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTest before you replace!.\u003c\/strong\u003e When you get your new sensor, before you go climbing on roofs - check the  sensors works in your machine. Don't unwrap it, plug it in and test it first. It may take a few minutes to register, but power cycling the controller usually takes a reading straight away.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWhere to put the hot sensor.\u003c\/strong\u003e It doesn't actually need to be right up next to the solar roofing panels\/tubes. As long as it's in the sun at the same time as the panels, it should work just fine. Don't put it in the shade though, it must get the same sun as the solar pool heating panels.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003e❓ Common Questions\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eWhich Dontek controllers does it suit?\u003c\/strong\u003e The digital V1, V2, V4, V5, V7, AS2 and AS3 controllers. Plus controllers (AS2+, AS3+ and AS5) need the \u003ca href=\"\/products\/dontek-solar-roof-hot-sensor-plus-series\"\u003ePlus roof sensor\u003c\/a\u003e instead, including our \u003ca href=\"\/products\/dontek-aquasun-2-solar-controller\"\u003eAquasun 2+\u003c\/a\u003e (AS2+) and \u003ca href=\"\/products\/dontek-aquasmart-5-s-solar-controller-1012101dt\"\u003eAquasmart 5 S\u003c\/a\u003e and \u003ca href=\"\/products\/dontek-aquasmart-5-cd-solar-controller-1012104dt\"\u003eAquasmart 5 CD\u003c\/a\u003e (AS5).\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWhat does a roof sensor do?\u003c\/strong\u003e It measures the temperature of your solar collectors so the controller knows when the roof is hot enough to heat the pool, and when to turn the pump on.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMy controller shows an error. Is the sensor faulty?\u003c\/strong\u003e Dontek lists 77\/99 as an open circuit, 66\/88 as a short circuit and 67\/89 as out of range. A damaged cable, a poor plug connection or a sensor sitting in a gutter are common causes, so check these and try the socket swap test before you replace the sensor.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWhich cable length do I need?\u003c\/strong\u003e It comes in 15 m, 20 m and 50 m. Choose the length that covers the run from your controller to the roof sensor position.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003e📂 Downloads and Support\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/www.dontek.com.au\/temperature-sensor-roof-hot\/\" rel=\"noopener\" target=\"_blank\"\u003eDontek Roof (Hot) Temperature Sensor page\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/www.dontek.com.au\/wp-content\/uploads\/2018\/11\/Sensors-Basic-Trouble-Shooting-V3.pdf\" rel=\"noopener\" target=\"_blank\"\u003eDontek Sensors Basic Troubleshooting (PDF)\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/www.dontek.com.au\/wp-content\/uploads\/2021\/11\/PSInstructV3.pdf\" rel=\"noopener\" target=\"_blank\"\u003eDontek Sensor Replacement Instructions (PDF)\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/www.dontek.com.au\/wp-content\/uploads\/2026\/08\/2627-DONTEK-product-catalogue-3.pdf\" rel=\"noopener\" target=\"_blank\"\u003eDontek Product Catalogue (PDF)\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"\/collections\/pool-heating\"\u003eShop Pool Heating\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"\/collections\/solar-heating-kits\"\u003eShop Solar Heating Kits\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"\/collections\/vendors?q=Dontek\"\u003eShop all Dontek products\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003e🚚 Shipping\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cstrong\u003eFlat Rate\u003c\/strong\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eExpress\u003c\/strong\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"\/pages\/shipping\"\u003eReview all shipping rates\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003e🛡️ Warranty Information\u003c\/h2\u003e\n\u003cp\u003eCovered by a standard 12 month manufacturer warranty from \u003ca href=\"https:\/\/www.dontek.com.au\/\" rel=\"noopener\" target=\"_blank\"\u003eDontek\u003c\/a\u003e.\u003c\/p\u003e\n\u003cp\u003e\u003cbr\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cbr\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eOther Search Terms:\u003c\/strong\u003e CA72, TS01, TS08, 1131013, 1131024, CA74, HWG2G025-BK-C15, HWG21402-BK-C50, HWG2G025-BK-C50, Dontek CA72, Dontek TS01, Dontek TS08, Dontek hot roof sensor, Dontek roof sensor 15m, Dontek roof sensor 20m, Dontek roof sensor 50m, solar pool heating roof sensor, solar controller roof sensor, Dontek hot RS 20M digital, Dontek hot RS 50M digital, Dontek V7 roof sensor, Dontek AS2 roof sensor, Dontek AS3 roof sensor, Aquasun roof sensor\u003c\/p\u003e","brand":"Dontek","offers":[{"title":"15 m","offer_id":52916921860394,"sku":"CA72","price":115.0,"currency_code":"AUD","in_stock":true},{"title":"20 m","offer_id":52916834271530,"sku":"1131013 \/ TS01","price":129.0,"currency_code":"AUD","in_stock":true},{"title":"50 m","offer_id":36316748644513,"sku":"1131024 \/ TS08","price":195.0,"currency_code":"AUD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0361\/8819\/2900\/products\/dontek-sensor-hot_dd022eed-91f5-4817-adc3-4c9abe2a2f75.jpg?v=1600636280","url":"https:\/\/aquafirst.com.au\/products\/dontek-solar-roof-hot-sensor-digital","provider":"Pools Online","version":"1.0","type":"link"}