External liquid level gauge

External liquid level gauge
Working principle
The high-precision intelligent external liquid level gauge can measure the liquid level in the tank by attaching the measuring sensor to the tank wall. It is also called external measurement. Level gauge. This measurement method is very simple and completely non-contact. It solves many liquid level measurements with special requirements (such as strong acid, strong alkali, strong corrosiveness and high-pressure tanks that are difficult to open holes, etc.). Moreover, the instrument is safe and reliable during use. The calibration sensor takes the liquid level measurement of the spherical tank in the side picture as an example. The calibration sensor installed at the large circle position of the tank emits a beam of sonar signals in real time. When the liquid level exceeds the installation position of the calibration sensor, the host can record the sonar signal from transmission to reception through a timer. time to obtain the propagation speed of the sonar signal in the medium /. Measuring Sensor The measuring sensor installed at the bottom of the tank emits a beam of sonar signals pointing to the liquid level in real time. When the signal reaches the liquid level, the emission occurs. The liquid level height*/ can be obtained by recording the time taken by the measuring sensor from transmitting to receiving.
Four-wire liquid level gauge
The external four-wire liquid level gauge is different from the two-wire liquid level gauge in that the four-wire instrument requires a power supply. The power supply can be / or /. Signal transmission also supports standard signal and communication interfaces.
Summary of features of external liquid level gauge
Widely applicable to highly toxic, acidic, alkali, corrosive and high-pressure environments
Various liquid media can be measured
High measurement accuracy The instrument is responsive
The instrument is easy to install and maintain and can be used without stopping production
The instrument has a self-calibration function
The instrument does not require maintenance and maintenance by the user
The instrument does not require regular calibration, reliable and stable performance Long service life
Parameter specifications
Table
Application scope restrictions
Tank wall thickness
Tank material Hard materials such as carbon steel, stainless steel, fiberglass
Hard Rubber, etc.
Environmental conditions Host operating ambient temperature ℃℃
Sensor operating ambient temperature ℃℃
Medium viscosity Dynamic viscosity There must be no solid precipitation in the medium
Liquid level meter product selection
Normal temperature
High temperature
Two wires
Four wires
Meter range
Meter range
Meter range
Meter range
Meter range
Meter range
Range specifications
Display resolution
Measurement accuracy
Output signal
Output load Standard load ohms Maximum load ohms
Migration
br/> Minimum measurement blind zone
Power supply voltage/
Electrical interface specifications/ / /
Protection level
Explosion-proof mark
Suitable for tank-type spherical tanks and horizontal tanks Vertical tanks, etc.