Liquid Level Sensor

A: Hydrostatic level sensors offer exceptional reliability because they measure liquid level based on the continuous physical weight of the fluid column. Unlike radar or ultrasonic sensors, hydrostatic sensors are completely unaffected by surface foam, dense vapor, steam, dust, or tank internal obstructions, making them the most stable choice for deep wells and sealed tanks.

A: Material selection depends entirely on chemical concentration and temperature. While SS316L is ideal for water and light oils, highly aggressive acids (like sulfuric, nitric, or hydrochloric acid) require an upgrade to Hastelloy C-276 or Tantalum diaphragms, accompanied by a solid PTFE or PVDF sensor outer housing.

A: Yes, but they require a specific setup. For vented/open tanks, a standard submersible gauge pressure sensor is used. For pressurized tanks, a sealed gauge or absolute pressure sensor variant, or a dual differential pressure configuration, is utilized to cancel out the head pressure inside the tank, ensuring only the true liquid level is calculated.

A: Our IP68 submersible cables feature a built-in, heavy-duty atmospheric vent tube running internally from the sensor capsule to the termination end. This allows the sensor's internal reference side to continuously adapt to ambient barometric pressure fluctuations, preventing zero-point drift and maintaining an accuracy class of up to ±0.1% FS.

A: In clean water applications, they require virtually zero maintenance. In wastewater, slurry, or heavy oil environments with high sediment or buildup, we equip our sensors with an open-face non-clogging ceramic diaphragm or a flush cage, which can be periodically rinsed to remove organic scaling.

A: Our smart digital level transmitters support standard analog 4-20mA loops (with HART 7 integration optional), as well as digital fieldbuses including Modbus RS485 (RTU) and ultra-low-power SDI-12 for remote environmental monitoring and telemetry.

A: Yes. For oil repositories, chemical plants, and volatile gas environments, we provide certified intrinsically safe configurations rated up to Ex ia IIC T6 Ga. These configurations restrict electrical energy levels to eliminate ignition risks.

A: Every single level sensor undergoes an exhaustive 100% factory inspection matrix: Positive Material Identification (PMI) material verification via XRF, automated multi-point thermal compensation cycling (-20°C to +85°C), 5-point pressure calibration tracking, and helium leak testing to guarantee permanent IP68 waterproof seal integrity.