The Ratiometric level sensor uses a voltage signal to represent the level . 

0.5 to 4.5V Level Sensor – Key Features

✔ 0.5–4.5V level sensor output with ratiometric analogue voltage signal
✔ Submersible water level sensor for tanks, boreholes, and reservoirs
✔ High accuracy measurement for industrial and commercial liquid level applications
✔ Ratiometric voltage output proportional to supply voltage for stable readings
✔ Wide measurement ranges available (up to 30 metres water gauge – mWG)
✔ Stable, low-noise signal for reliable analogue level monitoring
✔ MCU compatible sensor for embedded systems and control applications
✔ Easy integration design without complex signal conditioning
✔ Durable stainless steel probe for harsh environments and long-term use
✔ Customisable options including cable length and pressure range
✔ UK designed and manufactured for reliable performance

View the Ratiometric pressure sensor Article post for examples and further information on Ratiometric output.

Therefore integration is simplified by avoiding complex analogue circuitry.

Ratiometric Level sensor Output Example

for example a Ratiometric pressure sensor with a range of 0-10Bar and the supply

Ratiometric output if supply voltage is 5V

0Bar = 0.5V = 10%

10Bar=4.5V =90%

Ratiometric output if Supply voltage is 3V

0 Bar = 0.3V = 10%

10Bar = 2.7V=90%

Level Range

• 0-30mWG

Ratiometric Level transducer overview