Tank water level with MS5540-CM

Moderators: Voyager, BertB, rtenklooster, Stuntteam, grovkillen, TD-er

Post Reply
Message
Author
Sejcek1
Normal user
Posts: 2
Joined: 08 Sep 2018, 11:13

Tank water level with MS5540-CM

#1 Post by Sejcek1 » 08 Sep 2018, 16:25

Hi all,

Is there support for sensor MS5540-CM planned? It is quite cheap waterproof pressure sensor.
https://www.ebay.com/sch/i.html?_from=R ... M&_sacat=0

It seems it might be good for projects where you need to monitor the amount of water or other fluid (height / pressure) and, for example, drive the garden irrigation automation. Certainly, such a possibility would apply to many other people. Could anybody will be able to write a plugin for this sensor? I found some script for Arduino, but I can not know how to write it for ESPEasy:
https://gist.github.com/hephaestus9/daf ... 720e0e3431

Best Regards!
Sejcek1

User avatar
grovkillen
Normal user
Posts: 2240
Joined: 19 Jan 2017, 12:56
Location: Hudiksvall, Sweden
Contact:

Re: Tank water level with MS5540-CM

#2 Post by grovkillen » 08 Sep 2018, 16:33

Looks like a good sensor. You should add it as a feature request on GitHub.
ESP Easy Flasher [flash tool and wifi setup at flash time]
ESP Easy Webdumper [easy screendumping of your units]
ESP Easy Netscan [find units]
Official shop: https://firstbyte.shop/
Sponsor ESP Easy, we need you :idea: :idea: :idea:

HomeJCL
Normal user
Posts: 46
Joined: 03 Feb 2018, 10:42

Re: Tank water level with MS5540-CM

#3 Post by HomeJCL » 08 Sep 2018, 19:32

Looks good

But how to implement ? how to rig this to existing piping or water tanks ?

By the way, for level ... a barometer won’t be of much use.
Belgium and land of ESP ... counting :D

Domosapiens
Normal user
Posts: 171
Joined: 06 Nov 2016, 13:45

Re: Tank water level with MS5540-CM

#4 Post by Domosapiens » 09 Sep 2018, 21:11

How about the supported Ultrasonic HC-SR04
https://www.letscontrolit.com/wiki/index.php/HC-SR04

Waterproof:
https://www.aliexpress.com/item/Integra ... 90912.html

(not sure if they have the same interface towards ESPEasy)
25+ ESP units for production and test. Ranging from control of heating equipment, flow sensing, floor temp sensing, energy calculation, floor thermostat, water usage, to an interactive "fun box" for my grandson. Mainly using Wemos D1.

Sejcek1
Normal user
Posts: 2
Joined: 08 Sep 2018, 11:13

Re: Tank water level with MS5540-CM

#5 Post by Sejcek1 » 14 Sep 2018, 02:00

@HomeJCL: Just put it to the lowest place of the tank/pipe. Water/hydrostatic pressure is equal to water height so barometer should be useful (sure, only for atmospheric pressure tanks). It should be easy to convert pressure to water height.

@Domosapiens: You can measure up to 100m water level in narrow borehole within this sensor and sensitivity looks quite good.
https://www.youtube.com/watch?v=g_7txTdy-tg

HomeJCL
Normal user
Posts: 46
Joined: 03 Feb 2018, 10:42

Re: Tank water level with MS5540-CM

#6 Post by HomeJCL » 14 Sep 2018, 04:16

There are several types of this sensor

The link goes to a range of 10 ... 1100 mbar
with 100m waterproof spec ! Means over pressure capability nothing todo with measuring range.

Anyway if you use the linked sensor, (abs press sensor barometer), you need a second one as reference (for measuring atmospheric pressure) to be substracted from the level pressure

Eg Pabs 1023 mbarabs. Measurement of level 1089mbarabs

Level 1089-1023=66mbarabs ~ 660mm level

With sensor max range 1100, this summer where I live, we had max Patm 1037 leaves us a max useful level on that day of 630mm water !!!

Recap :
read carefully spec sheet !
need 2 pces to measure level or anyway you’ll need a Pabs reference to calculate level from vessel. Needs additional “programming” not much but I’m lazy

So you simplify by using same type but looking for a gauge pressure type and not absolute pressure.

But then we are back at square 1, expensive, difficulty of mounting, exposed circuit and risk of leakage !

JSNxxxxx sensor costs around 7 $US works up to 4-5m and does mount in no time and no risk of leakage.

KISS ... that is ESP Easy philosophy
Belgium and land of ESP ... counting :D

Post Reply

Who is online

Users browsing this forum: No registered users and 2 guests