QDY30A Hydrostatic Level Transmitter for Water

Submersible Hydrostatic Level Measurement

The QDY30A submersible level transmitter offers a dependable method for measuring liquid depth by sensing the hydrostatic pressure at the bottom of the submerged probe. As the water or liquid level fluctuates, the pressure exerted on the sensitive internal measuring element changes proportionally. This physical variation is instantly converted into a stable electrical signal, providing continuous and accurate level data.

This measurement approach is highly beneficial for industrial tanks, deep wells, and large-scale reservoirs. Unlike traditional mechanical floats or external sight gauges, the hydrostatic method involves no moving parts, which significantly reduces the risk of mechanical jamming or wear over time. Facility operators can rely on this continuous data feed to monitor storage volumes, optimize pump activation cycles, and prevent dry-running or overflow conditions.

Drop-in Installation for Simpler Deployment

One of the primary advantages of the QDY30A water level sensor is its straightforward, drop-in deployment design. Installing this transmitter simply requires lowering the weighted probe directly into the liquid using its attached heavy-duty cable. Once the cable is securely anchored at the top of the vessel or wellhead, the sensor hangs vertically at the desired measurement depth, ready to operate.

This streamlined process eliminates the need for complex site modifications. There is no requirement to drain the tank, drill side openings, weld custom mounting brackets, or assemble complicated mechanical structures. For existing tanks, underground wells, and older civil water infrastructure where physical access is limited or modifications are costly, this drop-in method provides a practical and immediate solution

Multiple Outputs for Flexible System Integration

To accommodate a wide variety of industrial automation and municipal monitoring systems, the QDY30A liquid level transmitter is available with multiple signal output options. Buyers can select standard analog outputs, such as 4–20mA or voltage signals, which are ideal for direct wiring into traditional Programmable Logic Controllers (PLCs), local display meters, and standard industrial control panels. The 4–20mA output is particularly advantageous for long-distance signal transmission, as it resists electrical noise and prevents data loss across extensive plant layouts.

For modern, data-driven facilities, the RS485 output option provides direct digital communication. This allows the transmitter to interface directly with SCADA systems, remote telemetry units (RTUs), and IoT monitoring networks.

Working Principle Diagram