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Last modified by Edwin Chen on 2025/06/26 11:53
From version 11.1
edited by Edwin Chen
on 2022/12/28 14:36
Change comment: Uploaded new attachment "image-20221228143643-1.png", version {1}
To version 5.1
edited by Edwin Chen
on 2022/12/17 16:54
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1 -**~ Table of Contents：**
1 +~= Overview =
2 2  
3 -{{toc/}}
4 -
5 -
6 -
7 -= Overview =
8 -
9 9  This URL introduce different methods to detect the water / liquid level.
10 10  
11 11  
12 -= Flow switch =
6 +~= Use a flow switch =
13 13  
14 -== How it works ==
8 +~==How it works==
15 15  
16 16  Below is an example of flow switch. and product link:
17 17  
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29 29  [[http:~~/~~/wiki.dragino.com/xwiki/bin/view/Main/User%20Manual%20for%20LoRaWAN%20End%20Nodes/LSN50%20%26%20LSN50-V2%20-%20LoRaWAN%20Sensor%20Node%20User%20Manual/#H2.4.5DigitalInterrupt >>http://wiki.dragino.com/xwiki/bin/view/Main/User%20Manual%20for%20LoRaWAN%20End%20Nodes/LSN50%20%26%20LSN50-V2%20-%20LoRaWAN%20Sensor%20Node%20User%20Manual/#H2.4.5DigitalInterrupt]]
30 30  
31 31  
32 -== Advantage & Disadvantage ==
26 +~==Advantage & Disadvantage==
33 33  
34 34  **Advantage** : Reliable , Easy to install & Immue to different environment.
35 35  
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37 37  
38 38  
39 39  
40 -
41 -= Ultrasonic Sensor =
42 -
43 -== How it works? ==
44 -
45 -Such as [[LDDS75>>https://www.dragino.com/products/distance-level-sensor/item/161-ldds75.html]] / [[LDDS45>>https://www.dragino.com/products/distance-level-sensor/item/191-ldds45.html]]. They are using ultrasonic technologic to detect the distance between the probe and a flat object such as water level.
46 -
47 -Below is photo and URL shows how Ultrasonic Sensor works to detect Water Level
48 -
49 -[[https:~~/~~/www.electricalvolt.com/2022/06/ultrasonic-level-transmitter-working/ >>https://www.electricalvolt.com/2022/06/ultrasonic-level-transmitter-working/]]
50 -
51 -[[image:image-20221217170756-1.png||height="465" width="539"]]
52 -
53 -
54 -When choose the ultrasonic sensor, we need to check the measure range , blind spot and angel to fit the tank.
55 -
56 -An important notice, if there are moisture accumulated in the sense area of Ultrasonic Probe of LDDS75/LDDS45. the reading will become invalid.
57 -
58 -
59 -== Advantage & Disadvantage ==
60 -
61 -**Advantage** : Able to detect the level. Good Accurancy.
62 -
63 -**Disadvanage**: Wrong reading when probe is block by moisture or other stuff. Affect by temperature.
64 -
65 -
66 -
67 -
68 68  
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