Wiki source code of Different methods to detect water and liquid level
Last modified by Xiaoling on 2022/12/29 17:35
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| 1 | **~ Table of Contents：** | ||
| 2 | |||
| 3 | {{toc/}} | ||
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| 5 | |||
| 6 | |||
| 7 | = 1. Overview = | ||
| 8 | |||
| 9 | |||
| 10 | This URL introduce different methods to detect the water / liquid level. | ||
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| 12 | |||
| 13 | = 2. Flow switch = | ||
| 14 | |||
| 15 | == 2.1 How it works == | ||
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| 17 | |||
| 18 | Below is an example of flow switch. and product link: | ||
| 19 | |||
| 20 | [[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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| 22 | [[image:image-20221217164157-1.png||height="329" width="486"]] | ||
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| 25 | [[image:image-20221217164432-3.png||height="282" width="501"]][[image:image-20221217164337-2.png||height="279" width="431"]] | ||
| 26 | |||
| 27 | The switch will switch on/off to show if the water / liquid has dedicate level. | ||
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| 29 | |||
| 30 | To use such switch with Dragino Products, use can connect it to LSN50v2 use the same way as a door switch. See reference link: | ||
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| 32 | [[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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| 34 | |||
| 35 | == 2.2 Advantage & Disadvantage == | ||
| 36 | |||
| 37 | |||
| 38 | (% style="color:blue" %)**Advantage**(%%) : Reliable , Easy to install & Immue to different environment. | ||
| 39 | |||
| 40 | (% style="color:red" %)**Disadvantage**(%%): Only be able to detect one speicify level. Not able to detect full range of water. | ||
| 41 | |||
| 42 | |||
| 43 | = 3. Ultrasonic Sensor = | ||
| 44 | |||
| 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/]] | ||
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| 54 | [[image:image-20221217170756-1.png||height="465" width="539"]] | ||
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| 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. | ||
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| 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: | ||
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| 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 **(%%): | ||
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