Two Wire External Liquid Level Sensor use for the oil tank and
A: No need contact the liquid, no need drilling the tank, Safe for
any harmful liquid and suitable for any sealed tank.
B: Global First Externl Two-Wire System, can save the wire cost.
C: Easy installation without flanges, save the installation cost.
D: Easy Trial run and Maintenance no need stop the work.
E: Auto-diagnosed and collation.
F: Video display and remote on the measuring value.
External liquid lever sensor with sonar ranging principle, using
the special probe gets the sonar signal; the probe has been pasted
in the bottom of the tank. Main system is special sonar wave
processing technology, using the SK Method to calculate the level
value and output of remote signal. Instrument can through the
(4-20)mA analog signal, HART, RS-485, Ethernet, transfers the
measurements to the control center, meanwhile can through the
wi-fi,Bluetooth,HART,RS-485, infrared, Ethernet debug the
Like the picture, Measure the liquid level, the sonar wave signal
from the probe to launch out, after liquid level reflected, the
probe detects echo signal. Echo signal by proprietary algorithm to
calculate the time (t), system can calculate the liquid level value
according to the formula.
3. Performance Index
|External liquid level sensor||Two-wire type|
|Max Measuring range||30M|
|Max Thank Thickness||30mm|
|Repeatability in short time||1mm|
|Signal output||(4~20 )mA, HART,MAX 500Ω|
|Environment temperature in using lever gauge||-20℃~+70℃,-40℃~+70℃|
|Environment temperature in using probe||-50℃~+100℃,60℃~330℃|
|Explosion-proof sign||Exd II CT6,Intrinsic safety|
|Enclosure protection grade||IP67|
|Dead zone||It will show “Dead” when liquid level in dead zone, the output will
be 4mA in signal|
|Power supply||DC 24V|
|The cable length from probe to main engine||5m,10m,15m,20m,25m,30m|
|Weight of mainframe||2.5KG|
|Size of mainframe||217mm(length)*160mm(width)*185mm(height)|
|The diameter of the base hole in mainframe||6mm|
4 Application liquid Material
4.1 Liquid Purity:
Liquid without much sediment, crystal, auto polymer, suspended
solid, some bubbles. A little is ok.
4.2 Liquid viscosity:
Dynamic viscosity of liquid medium＜30mPa.s
Note: The viscosity always reducing with the temperature’s upping,
so please take about the liquid temperature.
Tank material:need to use the hard steel, the material have to
transfer the signal well. Such as carbon steel, stainless steel,
glass fiber reinforced plastics, epoxy resins, ceramic, 16MnR,
304,316, FRP, hard rubber. The tank wall’s inside and outside
should even. If the tank wall have more layers materials, the space
between layers should touching closely, without babbles and air.
For Examples:Sulfide hard rubber lining, lining of epoxy resin,
stainless steel lining, titanium lining.
|Tank type||Q:spherical tank W:horizontal tank L:Vertical tank|
|C||The magnetic pen debugging module|