Water & Liquid Sensors

Water and liquid sensors are used to monitor parameters such as liquid level, flow rate, humidity and liquid quality. This category encompasses a wide range of products including float level switches, ultrasonic level sensors, capacitive and optical level detectors, soil moisture sensors, water flow meters, rain sensors, pH and TDS sensors, as well as water leak detectors. Whether for a hobby project or industrial automation, selecting the right liquid sensor is critical to your project's success.

Common Applications

• Industrial automation: Tank level monitoring, coolant tracking, wastewater management
• Agriculture and gardening: Soil moisture measurement, irrigation systems, hydroponic solution control
• Smart home and IoT: Flood alarm, rain-sensing automatic blinds, leak detection
• Environmental monitoring: River level, precipitation, water quality testing

Selection Criteria

When choosing a water or liquid sensor, consider the following factors:

• Measurement principle: Contact (float, conductivity) or non-contact (ultrasonic, capacitive)? Non-contact models are preferred for corrosive or dirty liquids.
• Output type: Analog voltage (0-5V), digital (on/off), pulse (flow meter) or communication interfaces (I2C, RS485) – ensure compatibility with your microcontroller.
• Supply voltage: 3.3V, 5V or 12-24V industrial supplies must match your circuit.
• Ingress protection (IP): Outdoor use requires IP67 or higher waterproof rating; indoor may suffice with lower ratings.
• Measurement range and accuracy: Maximum sensing distance (ultrasonic), flow rate range (l/min) or pH/TDS accuracy should meet your project requirements.

Our category offers reliable solutions from proven brands for both hobbyists and professionals. Detailed technical documentation and sample wiring diagrams can be found on each product page.