Product Introduction
The KH.YLS submersible pressure water level gauge is a high-precision and fully sealed liquid level sensor designed for long-term monitoring of water levels in rivers, reservoirs, groundwater wells, and industrial applications. Made of corrosion-resistant stainless steel, the device integrates a highly stable piezoresistive pressure sensor with an intelligent transmitter circuit, digital temperature compensation, and nonlinear correction technology.
This advanced design ensures exceptional measurement accuracy, stability, and durability, even under harsh environmental conditions such as sewage treatment plants, chemical factories, or high-humidity outdoor monitoring sites. Compact and easy to install, the KH.YLS is IoT-ready and supports multiple communication interfaces, making it widely used in hydrology, water resources management, urban drainage systems, and smart city monitoring projects.

Key Features

• High accuracy and stability — Measurement accuracy up to ±0.075%FS, yearly stability within ±0.2%FS, ensuring long-term reliable liquid level monitoring.

• Fully sealed stainless steel design — IP68-rated protection with waterproof and anti-corrosion housing, suitable for continuous submersion in rivers, reservoirs, groundwater wells, and sewage systems.

• Compact and easy installation — Lightweight and small-sized, the KH.YLS is simple to deploy and supports seamless integration with existing IoT water monitoring platforms.

• Flexible communication options — Supports 4–20mA analog output, RS485 Modbus, and HART® protocol, compatible with real-time remote monitoring systems.

• Wide measuring range — Available from 3.5 m to 200 m, covering shallow water bodies to deep groundwater wells.

• Energy-efficient two-wire design — Directly replaces traditional transmitters, reducing wiring costs and simplifying system upgrades.

Application Scenarios
The KH.YLS intelligent submersible water level sensor is widely used in both environmental and industrial monitoring projects:

• Rivers and streams — Real-time continuous monitoring for flood warning, water resource allocation, and hydrological studies.

• Reservoirs and dams — Accurate water level measurement for flood control, storage management, and smart irrigation scheduling.

• Groundwater monitoring — Long-term aquifer observation for agriculture, irrigation, and sustainable water use management.

• Chemical and industrial plants — Compatible with special liquids, ideal for monitoring water tanks, chemical solutions, and industrial wastewater.

• Sewage treatment and drainage systems — Provides reliable sewage level data for pumping station automation and urban drainage management.

• IoT-based environmental monitoring — Fully compatible with cloud platforms, telemetry systems, and RS485-based IoT water management networks.

Technical Specifications

• Measuring range: 3.5 m, 7 m, 10 m, 20 m, 35 m, 70 m, 100 m, 200 m (expandable)

• Overpressure range: 5 mH2O to 300 mH2O depending on model

• Accuracy: ±0.075%FS (minimum), ±0.1%FS (typical), ±0.25%FS (maximum)

• Long-term stability: ±0.2%FS/year

• Output signal: 4–20 mA DC; RS485 (custom protocol) or HART® protocol

• Power supply: 10–28 VDC depending on model

• Load capacity: 4–20 mA output, RS485 bus supports up to 99 transmitters

• Operating temperature: −10℃ to +70℃ (standard); −20℃ to +60℃ (intrinsically safe type)

• Storage temperature: −20℃ to +85℃

• Protection level: IP68 (transmitter), IP65 (junction box)

• Housing material: Stainless steel 316L diaphragm, stainless steel 1Cr18Ni9Ti shell, fluororubber O-ring

• Weight: Approx. 250 g