Optical Level Sensor

The optical liquid level switch uses the principle of total reflection in a prism. Reflection or penetration, is the basis of the level alarm output.

Stop fumbling for switches. Stop wasting electricity. Just reach.

You know that feeling. Standing at the sink with soapy hands, needing to turn on the under-sink light. Opening a dark closet at 6 AM, squinting for the pull chain. Wandering into the laundry room at night, feeling along the wall for a switch that isn't there.

The HojellyTek IR Proximity Sensor + WiFi Smart Outlet changes that.

Mount the sensor where you need it — inside a cabinet, under a sink, beside the bed. Plug your lamp, LED strip, or small appliance into the smart outlet. Then just reach. When your hand comes within 5–7 cm of the sensor, the power turns on. Move away, and it turns off after a few seconds.

No voice commands. No phone app needed (though you can use it if you want). Just simple, reliable, hands‑free control for the places that matter most.

Water evaporation is a constant challenge in any aquarium. Every day, your tank loses water, and in saltwater setups, that means salinity rises—stressing fish and corals. The HojellyTek Fish Tank Smart Refill is an automatic top‑off (ATO) system that senses exactly when your tank needs water and adds it back, keeping your water level perfectly stable at all times.

It works with an optical sensor—no floats, no moving parts, no jamming. Just a precise, reliable system that lets you focus on enjoying your aquarium, not babysitting it.

The optical liquid level switch uses the principle of total reflection in a prism. Reflection or penetration, is the basis of the level alarm output.

The optical liquid level switch uses the principle of total reflection in a prism. Reflection or penetration, is the basis of the level alarm output.

The optical liquid level switch uses the principle of total reflection in a prism. Reflection or penetration, is the basis of level alarm output.

The optical liquid level switch uses the principle of total reflection in a prism. Reflection or penetration, is the basis of level alarm output.

An IR proximity sensor (Infrared Proximity Sensor) is an electronic component that non‑contactly detects whether an object is approaching or present by emitting and receiving infrared light.

The optical liquid level switch uses the principle of total reflection in a prism. Reflection or penetration, is the basis of level alarm output.

This product is a smart touch switch specifically designed for home use. It combines convenient operation, safety, durability, and global compatibility. Relying on a mature smart system and high-quality materials, it brings technological convenience to household living and adapts to multi-regional usage scenarios, making it a practical choice for modern smart homes.

This US-standard smart socket, positioned as a neutral brand, focuses on smart home scenarios and offers intelligent control, safety, durability, and regulatory compliance. Designed specifically for export, it perfectly aligns with the core demands of overseas markets for smart electrical products. It delivers a convenient, safe, and efficient smart power experience, serving as the essential link between traditional appliances and a smart home lifestyle.

Have you ever found yourself in these awkward situations? You’re a thousand miles from home when you suddenly remember you forgot to turn off the electric heater. You’ve just settled into bed late at night only to realize the lamp is still on. Or you’re away on a business trip, worrying about whether the fish tank in your home is running out of oxygen or if your plants need watering. No need to panic! This Wi-Fi smart socket (often affectionately mispronounced as “wife smart socket”) combines minimalist design with powerful functionality, turning ordinary appliances into smart devices and putting you in full control of your electricity usage. It effortlessly unlocks a new, smarter way of living that’s convenient, safe, and energy-efficient ✨

This product belongs to the remote control switch series and is an intelligent wireless control device suitable for electric lights. With its convenient operation mode and stable performance, it is widely used in various scenarios, bringing users an efficient and worry-free electricity control experience.