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Last modified by Edwin Chen on 2025/06/26 11:53
From version 4.1
edited by Edwin Chen
on 2022/12/17 16:45
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To version 12.1
edited by Edwin Chen
on 2022/12/28 14:42
Change comment: Uploaded new attachment "image-20221228144206-2.png", version {1}

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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  
14 +== How it works ==
15 +
8 8  Below is an example of flow switch. and product link:
9 9  
10 10  [[https:~~/~~/www.amazon.com/Float-Switch-Septic-System-Sump/dp/B0064BHEVM/ref=sr_1_5?crid=2PCMSD63FBP42&keywords=float%2Bswitch&qid=1671230997&refinements=p_72%3A1248909011&rnid=1248907011&s=hi&sprefix=float%2Bswitch%2Caps%2C155&sr=1-5&th=1 >>https://www.amazon.com/Float-Switch-Septic-System-Sump/dp/B0064BHEVM/ref=sr_1_5?crid=2PCMSD63FBP42&keywords=float%2Bswitch&qid=1671230997&refinements=p_72%3A1248909011&rnid=1248907011&s=hi&sprefix=float%2Bswitch%2Caps%2C155&sr=1-5&th=1]]
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11 11  
12 12  [[image:image-20221217164157-1.png||height="329" width="486"]]
13 13  
14 -[[image:image-20221217164432-3.png||height="282" width="501"]][[image:image-20221217164337-2.png||height="327" width="505"]]
22 +[[image:image-20221217164432-3.png||height="282" width="501"]][[image:image-20221217164337-2.png||height="279" width="431"]]
15 15  
24 +The switch will switch on/off to show if the water / liquid has dedicate level.
16 16  
17 -Such switch has NC and NO which will action when
26 +
27 +To use such switch with Dragino Products, use can connect it to LSN50v2 use the same way as a door switch. See reference link:
28 +
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 +
31 +
32 +== Advantage & Disadvantage ==
33 +
34 +**Advantage** : Reliable , Easy to install & Immue to different environment.
35 +
36 +**Disadvantage**: Only be able to detect one speicify level. Not able to detect full range of water.
37 +
38 +
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 +
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