Oct 22, 20152 min read

Reliable and cost-effective liquid level sensor from Daviteq

There are many kinds of liquid-level sensors on the market. Each kind of technology for liquid level measurement will have its pro and cons. To select the optimum liquid continuous-level measurement sensor, the user needs to consider the following factors:

Process conditions: what is the medium to measure (water, wastewater, oil…), working pressure, working temperature…
Environment conditions: indoor or outdoor, direct sunshine or with sunroof, rain, air humidity and temperature…
Output signal: 4-20mA, RS485/ Modbus, I2C…
Power supply: battery operated, external power supply…

For applications of detecting the level like:

River water level monitoring;
Lake water level monitoring;
Dam water level monitoring;
City drainage level monitoring;
Water tank level monitoring;
Water treatment level monitoring;
Water well level monitoring;
…

We suggest using the submersible level transmitter, instead of the ultrasonic level transmitter radar level transmitter or point level wireless sensors (float level sensor)…because of the following advantages of submersible level transmitter:

It uses the hydrostatic pressure sensor to measure directly the liquid column pressure, then can be transferred to the liquid level by multiplying the liquid density. This pressure measuring technique will be not affected by environmental conditions like air humidity, rain… as ultrasonic level sensors and radar level sensors are easily affected;
The installation is also very simple, as it is not affected by obstruction (tank wall, steel structure, bridge…) as the method of time of light measured as ultrasonic and radar;
It delivers continuous output instead of some points of level as point level measurement sensor;
It has 02 kinds of output: 4-20mA and RS485/ Modbus RTU is easily connected to any controller, PLC, IoT Gateway, or wireless sensor…on the market;
Better price/ performance ratio compared to ultrasonic and radar;
It has a very wide range, and can measure up to 200m water level of a deep water well. Normally, the ultrasonic or radar is limited by a 10m level;
There is no moving part, compare to float type point level sensor. Therefore submersible level transmitter has a longer life than the float-type level sensor.

Daviteq would like to propose to the customer a good price/performance ratio submersible level transmitter LEET-M for the above applications. LEET-M is a continuous-level measurement sensor that has the following features: