With a rapid 2 second response, this sensors monitors real time water temperature changes for immediate adjustments Tracks surfaces, air, and solar temperatures simultaneously for comprehensive pool environment management The 520272 water / air / solar temperature sensors features advanced sensing technology with ±0.5℃ accuracy, ensuring optimal pool and spa water conditions For touch systems and various automation controls for versatile use Equipped with high precisions 10KΩ thermistor and 20inch cable for stable signals transmission Perfectly suitable for various heaters Ideal for residential / commercial pools and spas, providing consistent temperature control Also optimizes solar heating systems by improving energy efficiency and reducing operational costs Designed with superior IP68 waterproof rating, this probe withstands extreme and exposure Features moderate cable length and simple installation structure for easy setup without professional skills