Possibility of reading gas meter

Others (MiLight, Hue, Toon etc...)

Moderator: leecollings

Post Reply
rednas
Posts: 132
Joined: Tuesday 20 October 2015 12:23
Target OS: Raspberry Pi / ODroid
Domoticz version:
Location: Netherlands
Contact:

Possibility of reading gas meter

Post by rednas »

Hello,

I would like to read my gas meter. I've seen meters measured with reed switches or with photo diodes, however my gas meter seems not to have these possibilities. I actually cannot find anything to read it.
See the pictures for a similar gas meter (pictures are from Tweakers user Raven):
Image
Image

Does someone know if it is possible to read the meter?

Thanks in advance.
AirbusRichie
Posts: 5
Joined: Wednesday 17 February 2016 14:52
Target OS: Raspberry Pi / ODroid
Domoticz version:
Contact:

Re: Possibility of reading gas meter

Post by AirbusRichie »

I have a similar meter and I just finish building a sensor for this based on an arduino nano with a hmc5883l magnetometer. Google is your friend, there are a few well documented projects like this.

I didn't post anything on this yet, since its still a work in progress. What I am doing is converting the "top" and the "bottom" of a wave that is the output of the magnetometer to a "pulse". I then use this to output over USB (serial) an emulated S0PCM. One pulse is exacly 0.001 m3.
rednas
Posts: 132
Joined: Tuesday 20 October 2015 12:23
Target OS: Raspberry Pi / ODroid
Domoticz version:
Location: Netherlands
Contact:

Re: Possibility of reading gas meter

Post by rednas »

I know Google is my friend and know many people use a reed switch for reading it but there is no magnet present in my meter. I tried a reed switch in front of the last digit, but it didn't work.
AirbusRichie
Posts: 5
Joined: Wednesday 17 February 2016 14:52
Target OS: Raspberry Pi / ODroid
Domoticz version:
Contact:

Re: Possibility of reading gas meter

Post by AirbusRichie »

This is why I am using an magentometer and not a reed switch. That didn't work for me either.
Attachments
IMG-20160324-WA0001.jpg
IMG-20160324-WA0001.jpg (139.98 KiB) Viewed 4316 times
RidingTheFlow
Posts: 72
Joined: Friday 11 March 2016 18:23
Target OS: Raspberry Pi / ODroid
Domoticz version:
Location: Essex, UK
Contact:

Re: Possibility of reading gas meter

Post by RidingTheFlow »

rednas wrote:I know Google is my friend and know many people use a reed switch for reading it but there is no magnet present in my meter. I tried a reed switch in front of the last digit, but it didn't work.
Are you sure there is no magnet? Your reed switch may be not sensitive enough - a lot of them have pretty high activation requirement. Also magnet sometimes is not on digit, but actually _after_ it (it actually makes sense since disk with digits has no space around it).

I have a meter which other people said they cant read using reed switches, but I just went on Farnell and bought specific reed switch with low AT activation force, and it did work perfectly.

Try using your phone with Sensors app and check phone's magnetometer output when meter rotates - magnetometer will pick it for sure if there is a magnet here.

Also this round hole near "m3" is suspicious - there may be something optical-related in here.
dpcreel
Posts: 44
Joined: Friday 25 November 2016 14:30
Target OS: Raspberry Pi / ODroid
Domoticz version:
Contact:

Re: Possibility of reading gas meter

Post by dpcreel »

AirbusRichie - any update on using the magnetometer to measure the gas meter? I was able to get it to read the meter but am stuck at converting the data to a useful pulse.
JERO79
Posts: 1
Joined: Wednesday 15 February 2017 14:07
Target OS: Raspberry Pi / ODroid
Domoticz version:
Contact:

Re: Possibility of reading gas meter

Post by JERO79 »

I have the same gas meter and wish to import the data into Domoticz. Has anybody succeeded in this?
User avatar
emme
Posts: 909
Joined: Monday 27 June 2016 11:02
Target OS: Raspberry Pi / ODroid
Domoticz version: latest
Location: Milano, Italy
Contact:

Re: Possibility of reading gas meter

Post by emme »

I'm using northQ gas reader...
but with such meter you can use try to give a look to ESP8266 with magnets (reed) which can be somthing like:
https://www.mysensors.org/build/binary
The most dangerous phrase in any language is:
"We always done this way"
bjacobse
Posts: 85
Joined: Tuesday 06 September 2016 9:08
Target OS: Raspberry Pi / ODroid
Domoticz version:
Location: Sorø, DK
Contact:

Re: Possibility of reading gas meter

Post by bjacobse »

Have you tried the TRCT5000? it is maybe working for you to sense the white lines on black background on the last dial
https://www.google.dk/search?q=tcrt5000 ... TWAbg48ZeM:

viewtopic.php?t=2157&start=20#p29305
dpcreel
Posts: 44
Joined: Friday 25 November 2016 14:30
Target OS: Raspberry Pi / ODroid
Domoticz version:
Contact:

Re: Possibility of reading gas meter

Post by dpcreel »

I was able to get a gas meter reading using a magnetometer. I had to use a magnetometer because my gas meter is outside and there are no viable magnets to use for a reed switch or hall sensor. The gas company would not let me cover up the dials with anything. So I resorted to using a magnetometer to measure the minute variations in the magnetic field caused by the movement of the bellows in the meter. So far so good.

https://forum.mysensors.org/topic/6125/ ... gnetometer
zboblamont
Posts: 2
Joined: Saturday 13 May 2017 10:56
Target OS: Windows
Domoticz version:
Contact:

Re: Possibility of reading gas meter

Post by zboblamont »

No idea if it works as not yet got nodes and controller set up. There seem to be many variants of the G4 meter, the Elster version (branded by local supplier) I have uses this type http://store.meterprovida.com/store/cat ... ur002.aspx
This meter has a rebate into which the reed switch fits, the lug on the right links with an eye flange to which the gas utility usually fit a seal
Post Reply

Who is online

Users browsing this forum: No registered users and 0 guests