Non - Invasive Ultrasonic Fluid Level Sensor Temperature Integrated Sensor

1. Principle of Operation

External liquid lever sensor with sonar ranging principle,

using the temperature integrate sensor to process the sonar

signal. the sensor is pasted in the outerwall of the tank. Using the

patented algorithm to calculate the height of the liquid in the

tank and output to a remote control system(eg.DCS) through

(4-20)mA,HART, RS-485, Modbus.

According the figure right, the time is taken for the signal to

be transmitted and then received from the liquid surface. Signals

from the transducer are fed into the processor and then

processed by patented algorithm to calculate the height of the

liquid according to the formula:

H=αV(t-t1)/2

H: height of the liquid

v: velocity of sound in the liquid

t: time between transmitted and received signal

t g : propagation time in the tank wall

α :liquid compensation factor

2. Applications

LPG tanks

liquid ammonia tanks

liquid propane tanks

Fuel tanks

Acids/solvents tanks

Concentrated sulfuric acid(98%) tanks

Nitric acid tanks

Hydrochloric acid tanks

3. Features

True non-invasive sensing technology

The sensor sticks to the outside of the tank bottom

Suitable for most shapes and sizes of cans

Output to telemetry system - various options

CNEX approved for use in hazardous areas

(processor and sensor)

Temperature integrated sensor

Low cost, reliable & accurate tank gauging

Not affected by pressure

Easy installation - no tank break-in

Simple retroft to existing tanks

No down-time during installation

No moving parts – no maintenance

3. Parameter