YoLink Water Level Sensor YS7904-UC 1320ft Range Battery Powered

Description

Product Overview

The YoLink YS7904-UC water level sensor is a compact, battery‑powered device designed to give you continuous insight into the water level of any container up to 1,000 feet in open‑air range. Housed in a durable plastic enclosure measuring just 2.44 x 2.44 x 0.8 inches, the sensor combines a high‑sensitivity sound sensor with a robust LoRa‑based wireless module that can transmit data up to 1,320 feet, far beyond the reach of typical Wi‑Fi or Bluetooth solutions. The unit runs on two AAA alkaline batteries, included in the package, delivering up to two years of maintenance‑free operation. A built‑in 105 dB sounder provides an immediate audible alert, while the companion YoLink app delivers real‑time notifications, historical logs, and customizable thresholds for high‑ and low‑level warnings. The sensor is wall‑mountable, with an optional rugged bracket for added protection, and it integrates seamlessly with popular smart‑home ecosystems such as Alexa, IFTTT, and Home Assistant, allowing you to automate pumps, valves, or other devices based on water level data.

Usage

This sensor excels in a wide variety of environments where water level monitoring is critical. Homeowners can place it in basement sump pits to receive early warnings of rising water before a flood occurs, protecting valuable possessions and reducing cleanup costs. In commercial settings, the sensor can be installed in water storage tanks, cooling tower basins, or irrigation reservoirs to ensure optimal levels are maintained, preventing equipment damage or water waste. Aquarists and pond enthusiasts benefit from the sensor’s ability to detect subtle changes in tank or pond depth, enabling timely adjustments to filtration or aeration systems. Because the device communicates via LoRa, it can be positioned in remote locations where Wi‑Fi coverage is unavailable, such as outdoor rain barrels, cisterns, or even large fish farms. The intuitive app interface lets users set high‑level and low‑level thresholds, receive push notifications, and view a graphical history of water level trends, making it easy to spot patterns and plan maintenance activities.

Why Choose Us

Choosing the YoLink water level sensor means investing in a solution that blends reliability, flexibility, and long‑term support. The sensor’s plastic housing is engineered to resist corrosion and impact, ensuring a lifespan that matches the two‑year battery warranty. Our LoRa technology provides a proven, low‑power communication protocol that outperforms traditional RF and Bluetooth in both range and battery efficiency. The product is backed by a dedicated customer support team that offers installation guidance, firmware updates, and troubleshooting assistance, all accessible through the YoLink app or our online portal. Additionally, the sensor is part of a broader YoLink ecosystem, meaning you can expand your smart‑home or industrial monitoring setup with compatible devices such as remote sirens, smart plugs, or additional environmental sensors, all managed from a single hub. This modular approach reduces overall system cost while delivering a cohesive, scalable monitoring platform.

Key Features

• Long‑range LoRa communication up to 1,320 ft ensures reliable alerts even in remote locations.
• High‑volume 105 dB sound alarm provides immediate on‑site warning without relying on a phone.
• Battery‑powered design with two AAA alkaline cells offers up to two years of maintenance‑free operation.
• Easy wall‑mount installation with optional rugged bracket for added protection against impact and tampering.
• Comprehensive after‑sales support, including firmware updates and dedicated technical assistance.

FAQ

How does the YoLink water level sensor detect water level changes?

The sensor uses a built‑in sound detection module that picks up the acoustic signature of water hitting the float switch. When the water reaches a predefined height, the float triggers the sensor, which then sends a wireless signal via LoRa to the YoLink hub and ultimately to your smartphone app. This method allows the device to work without direct contact with the water, reducing corrosion risk and extending battery life.

Can the sensor be used without a YoLink hub?

No. The sensor requires a YoLink hub to translate the LoRa signal into Wi‑Fi or Ethernet for internet connectivity. The hub acts as a bridge between the sensor and the YoLink app, enabling remote notifications, data logging, and integration with third‑party services like Alexa or IFTTT. A hub is sold separately, and we recommend the SpeakerHub model for voice‑enabled alerts.

What maintenance is required for the sensor?

Maintenance is minimal. The sensor’s batteries should be checked annually, although the two‑year warranty covers battery depletion. The float switch may need occasional cleaning to remove debris that could affect its buoyancy. The plastic housing can be wiped with a damp cloth; avoid harsh chemicals that could degrade the material. Firmware updates are delivered automatically through the YoLink app, ensuring the device stays up‑to‑date without manual intervention.

Is the sensor compatible with other smart‑home platforms?

Yes. In addition to YoLink’s native app, the sensor can be linked to Alexa, Google Assistant, IFTTT, and Home Assistant via the YoLink hub. This enables voice commands, automated routines, and cross‑platform alerts, giving you flexibility to integrate the sensor into existing smart‑home workflows.

What is the warranty coverage for the YoLink water level sensor?

The product comes with a two‑year limited warranty that covers defects in materials and workmanship. If the sensor fails within the warranty period, YoLink will repair or replace it at no cost to the customer. The warranty does not cover damage caused by misuse, exposure to extreme temperatures beyond the specified operating range, or unauthorized modifications.