Ikea has introduced three new Zigbee sensors for doors and windows, motion, and water leaks, priced under $10 each. The sensors are designed to be affordable and easy to use, and can be paired directly with Ikea smart bulbs without the need for a hub. The sensors will be available globally in the first half of next year, with staggered releases in different countries. Ikea's goal is to democratize the smart home market with affordable and accessible products.