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Last modified by Edwin Chen on 2025/06/26 11:53
From version 9.1
edited by Edwin Chen
on 2022/12/17 17:07
Change comment: Uploaded new attachment "image-20221217170756-1.png", version {1}
To version 13.2
edited by Xiaoling
on 2022/12/29 17:35
Change comment: There is no comment for this version

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1 -XWiki.Edwin
1 +XWiki.Xiaoling
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2 2  
3 3  {{toc/}}
4 4  
5 -= Overview =
6 6  
6 +
7 += 1. Overview =
8 +
9 +
7 7  This URL introduce different methods to detect the water / liquid level.
8 8  
9 9  
10 -= Flow switch =
13 += 2. Flow switch =
11 11  
12 -== How it works ==
15 +== 2.1 How it works ==
13 13  
17 +
14 14  Below is an example of flow switch. and product link:
15 15  
16 16  [[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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17 17  
18 18  [[image:image-20221217164157-1.png||height="329" width="486"]]
19 19  
24 +
20 20  [[image:image-20221217164432-3.png||height="282" width="501"]][[image:image-20221217164337-2.png||height="279" width="431"]]
21 21  
22 22  The switch will switch on/off to show if the water / liquid has dedicate level.
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27 27  [[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]]
28 28  
29 29  
30 -== Advantage & Disadvantage ==
35 +== 2.2 Advantage & Disadvantage ==
31 31  
32 -**Advantage** : Reliable , Easy to install & Immue to different environment.
33 33  
34 -**Disadvantage**: Only be able to detect one speicify level. Not able to detect full range of water.
38 +(% style="color:blue" %)**Advantage**(%%) : Reliable , Easy to install & Immue to different environment.
35 35  
40 +(% style="color:red" %)**Disadvantage**(%%): Only be able to detect one speicify level. Not able to detect full range of water.
36 36  
37 37  
43 += 3. Ultrasonic Sensor =
38 38  
45 +== 3.1 How it works? ==
46 +
47 +
48 +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.
49 +
50 +Below is photo and URL shows how Ultrasonic Sensor works to detect Water Level
51 +
52 +[[https:~~/~~/www.electricalvolt.com/2022/06/ultrasonic-level-transmitter-working/ >>https://www.electricalvolt.com/2022/06/ultrasonic-level-transmitter-working/]]
53 +
54 +[[image:image-20221217170756-1.png||height="465" width="539"]]
55 +
56 +
57 +When choose the ultrasonic sensor, we need to check the measure range , blind spot and angel to fit the tank.
58 +
59 +An important notice, if there are moisture accumulated in the sense area of Ultrasonic Probe of LDDS75/LDDS45. the reading will become invalid.
60 +
61 +
62 +== 3.2 Advantage & Disadvantage ==
63 +
64 +
65 +(% style="color:blue" %)**Advantage**(%%) :  Able to detect the level. Good Accurancy.
66 +
67 +(% style="color:red" %)**Disadvanage**(%%): Wrong reading when probe is block by moisture or other stuff. Affect by temperature.
68 +
69 +
70 += 4. Pressure Sensor =
71 +
72 +== 4.1 How it works? ==
73 +
74 +
75 +Pressure Sensor such as [[PS-LB>>https://www.dropbox.com/sh/eshhuk347xi1ce4/AAA4LUmYc2ITayfJUVsqK3wya?dl=0]] measures the pressure of the air / gas / liquid so can calcualte the liquid level.
76 +
77 +there are two types , (% style="color:blue" %)**Thread type** (%%)and (% style="color:blue" %)**Immersion type**(%%). as below:
78 +
79 +
80 +[[image:image-20221228143643-1.png||height="223" width="312"]] [[image:image-20221228144206-2.png||height="256" width="335"]]
81 +
82 +
83 +== 4.2 Advantage & Disadvantage ==
84 +
85 +
86 +(% style="color:blue" %)**Advantage**(%%) :  Able to detect air / gas / liquid pressure level. Immue to factors such as moisture / blocking. etc. Flexible for installation for
87 +
88 +(% style="color:red" %)**Disadvanage **(%%):
89 +
90 +
91 +
39 39  
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