LG01 Datasheet, PDF (1/4 Pages) List of Unclassifed Manufacturers – Liquid Flow Switch and Bubble Detector

LG01-2000Axxx
Liquid Flow Switch and Bubble Detector
 Detection of low liquid flow in the ml/min Range
 Totally non-invasive
 Ultra-fast response time of 100 ms
Product Summary
The LG01 Liquid Flow Switch enables detection of
flow of liquid in the range of ml/min. The output signal
is 5V when the flow rate is higher than the specified
flow switch point and 0V below this limit or when air
or bubbles are found inside the sensor’s flow channel
instead of liquid.
Excellent chemical resistance and bio-compatibility
are ensured: The flow path of the LG01 Liquid Flow
Switch is formed by a simple, straight glass capillary.
For more information on communication, please refer
to section 2 of this document.
1 Sensing Performance
Table 1: Model specific performance of LG01 (all data for medium H2O, 23°C)
Parameter
LG01-2000A090 LG01-2000A005
H2O flow switching point
H2O maximum flow rate
4.5
0.25
50
220
Accuracy^a of switching point
±10
±10
Switching hysteresis
±5
±5
Mounting orientation sensitivity^b
+2
+14
Flow detection response time 63
50
Response time on power-up
120
Operating temperature
+10…+50
Ambient storage temperature^c
-10…+60
Operating pressure
3
Proof pressure
5
a_{Better available on request}
b_{Maximum shift of switching point if mounted vertically}
c_{Non-condensing, flow path empty}
Unit
ml/min
ml/min
% of switching point
% of switching point
% of switching point
ms
ms
°C
°C
bar
bar
1.1 Operation with Other Liquids than Water
Due to the measurement principle the LG01 flow switch characteristics is changing with the thermal properties of the
liquid. For aqueous solutions the data for H2O as stated above is a good approximation.
For hydrocarbon liquids such as oil, fuel, or organic solvents, the flow switch point shifts towards higher flow rates.
For indicative purpose, data is provided for isopropyl alcohol (IPA) below.
Table 2: Approximate switch levels of the LG01 liquid flow switch with hydrocarbon liquids
Parameter
LG01-2000A090 LG01-2000A005
Approximate flow switching point with IPA
9
1.4
Maximum flow rate with IPA
>250
>250
Unit
ml/min
ml/min
www.sensirion.com
February 2015 V2
1/4