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Author

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1		-XWiki.Edwin
	1	+XWiki.Xiaoling

Content

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7		-= Overview =
	7	+= 1. Overview =
8	8
	9	+
9	9	This URL introduce different methods to detect the water / liquid level.
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11	11
12		-= Flow switch =
	13	+= 2. Flow switch =
13	13
14		-== How it works ==
	15	+== 2.1 How it works ==
15	15
	17	+
16	16	Below is an example of flow switch. and product link:
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18	18	[[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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19	19
20	20	[[image:image-20221217164157-1.png||height="329" width="486"]]
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	24	+
22	22	[[image:image-20221217164432-3.png||height="282" width="501"]][[image:image-20221217164337-2.png||height="279" width="431"]]
23	23
24	24	The switch will switch on/off to show if the water / liquid has dedicate level.
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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]]
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31	31
32		-== Advantage & Disadvantage ==
	35	+== 2.2 Advantage & Disadvantage ==
33	33
34		-**Advantage** : Reliable , Easy to install & Immue to different environment.
35	35
36		-**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.
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	40	+(% style="color:red" %)**Disadvantage**(%%): Only be able to detect one speicify level. Not able to detect full range of water.
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	43	+= 3. Ultrasonic Sensor =
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41		-= Ultrasonic Sensor =
	45	+== 3.1 How it works? ==
42	42
43		-== How it works? ==
44	44
45	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.
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56	56	An important notice, if there are moisture accumulated in the sense area of Ultrasonic Probe of LDDS75/LDDS45. the reading will become invalid.
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58	58
59		-== Advantage & Disadvantage ==
	62	+== 3.2 Advantage & Disadvantage ==
60	60
61		-**Advantage** : Able to detect the level. Good Accurancy.
62	62
63		-**Disadvanage**: Wrong reading when probe is block by moisture or other stuff. Affect by temperature.
	65	+(% style="color:blue" %)**Advantage**(%%) :  Able to detect the level. Good Accurancy.
64	64
	67	+(% style="color:red" %)**Disadvanage**(%%): Wrong reading when probe is block by moisture or other stuff. Affect by temperature.
65	65
66		-= Pressure Sensor =
67	67
68		-== How it works? ==
	70	+= 4. Pressure Sensor =
69	69
	72	+== 4.1 How it works? ==
	73	+
	74	+
70	70	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.
71	71
72		-there are two types , **Thread type** and **Immersion type**. as below:
	77	+there are two types , (% style="color:blue" %)**Thread type** (%%)and (% style="color:blue" %)**Immersion type**(%%). as below:
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75	75	[[image:image-20221228143643-1.png||height="223" width="312"]] [[image:image-20221228144206-2.png||height="256" width="335"]]
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77	77
78		-== Advantage & Disadvantage ==
	83	+== 4.2 Advantage & Disadvantage ==
79	79
80		-**Advantage** : Able to detect air / gas / liquid pressure level. Immue to factors such as moisture / blocking. etc. Flexible for installation for
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82		-**Disadvanage**:
	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
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	88	+(% style="color:red" %)**Disadvanage **(%%):
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