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Last modified by Edwin Chen on 2025/06/26 11:53
From version 6.1
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 +**~ Table of Contents：**
2 +
3 +{{toc/}}
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6 +
1 1  = Overview =
2 2  
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 8  == How it works ==
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32 32  
33 33  
34 34  
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/]]
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51 +[[image:image-20221217170756-1.png||height="465" width="539"]]
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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.
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image-20221217170756-1.png
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1 +XWiki.Edwin
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