My galaxy heart sensor got moisture in it's one of it's parts and I even don't put in any water now it's heartrate sensor giving me error to clean the sensor :
Temperature sensor and more: How Galaxy Watch 5 elevates Samsung's Health platform - SamMobile
Samsung Galaxy Watch 4 - The Official Samsung Galaxy Site
This is exactly what the redesigned "better contact" bio sensor looks like : r/GalaxyWatch
Samsung Galaxy Watch review: Hardware and battery life
Amazon.com: SAMSUNG Galaxy Watch 5 [2022] Latin Specs (44mm) Bluetooth Aluminum Case BioActive Sensor Sleep Tracking Heart (44 mm, Silver/White + 15W Wall Charger) : Cell Phones & Accessories
Explained: All Kinds Of Sensors In Smartwatch, Pros and Cons | Cashify Smartwatches Blog
Apple Watch 7 vs. Samsung Galaxy Watch 4: Which smartwatch is for you? | CNN Underscored
Amazon.com: Samsung Galaxy Watch 5 [2022] Latin Specs Bluetooth Aluminum Case BioActive Sensor Sleep Tracking Heart (40mm, Silver / Violet + 15W Wall Charger) : Cell Phones & Accessories
Samsung Galaxy Watch 5 review: if it only had a better battery - The Verge
Samsung Leads Holistic Health Innovation with the launch of Galaxy Watch5 and Galaxy Watch5 Pro – Samsung Newsroom Canada