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Last modified by Edwin Chen on 2025/06/26 11:53
From version 5.1
edited by Edwin Chen
on 2022/12/17 16:54
Change comment: There is no comment for this version
To version 10.1
edited by Edwin Chen
on 2022/12/17 17:13
Change comment: There is no comment for this version

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1 -~= Overview =
1 +**~ Table of Contents：**
2 2  
3 +{{toc/}}
4 +
5 +
6 +
7 += Overview =
8 +
3 3  This URL introduce different methods to detect the water / liquid level.
4 4  
5 5  
6 -~= Use a flow switch =
12 += Flow switch =
7 7  
8 -~==How it works==
14 +== How it works ==
9 9  
10 10  Below is an example of flow switch. and product link:
11 11  
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23 23  [[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]]
24 24  
25 25  
26 -~==Advantage & Disadvantage==
32 +== Advantage & Disadvantage ==
27 27  
28 28  **Advantage** : Reliable , Easy to install & Immue to different environment.
29 29  
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31 31  
32 32  
33 33  
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 +
34 34  
image-20221217170756-1.png
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1 +XWiki.Edwin
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