A Working Google Gas Meter !

03Aug10

I am now getting gas usage data through to Google Power Meter.

I did mention a while back that a connection was established to the gas meter and being logged, but the data never up until now never made it through to Google Power Meter.  Here is the old article link
https://albacontrols.wordpress.com/2009/08/17/gas-metering-result/

So those clever people at Brultech have now added a little more functionality to get the gas/counter displayed on the very useful Google Power Meter, here is a snap.

It is great to manage both energy utilities, though both work best once some history is collected.  Not sure if anyone else has done the Google Power meter for gas yet ?

Okay, it works and is useable though not perfect.  My display says kWh but it is actually m3 and Google only provides one costing rate so the financial figures are for generation.  I do wonder how much effort the Google people put in on this topic as it sounds spookily quiet on the help/forum.

Recap, how is it done ?
In summary, the Brultech ECM 1240 device channel 7 can be configured as a counter which is interfaced to the 0.01m3 pulses output from the domestic gas meter.  The Brultech EngineG software will then work out a rate measurement and post it off to Google every 15 minutes. Easy !

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3 Responses to “A Working Google Gas Meter !”

  1. 1 Steven Harbauer

    Good job and thanks for posting the update to the group. I started looking around some more since I realized that there are lower cost options that include contact-closure or pulse-in channels. And on top it, I am seeing that very little data is really being collected – everything seems to be kwH as opposed to V,I and calculated parameters like PF. I guess no one wants the liability or deal with the expense of a PT (potential or voltage measurement) for true energy measurements. Collecting data with CT’s is simple stuff.

  2. 2 Paul

    With regards to true energy measurement, I just wanted to point out that our ECM-1240 does take true power readings. We use a specific wall transformer for voltage sampling and a special techinique to use the same transformer as a power source to the ECM. We also use CTs with very low phase shift to provide an accurate reading at lower PF.

    I see more and more low-cost energy monitors which simply use a CT to make assumptions about energy use. I agree, to convert the output of a cheap CT into assumed power value is very simple to do. Using high speed sampling of voltage and current to derive true power is another story…. We want to represent what the power company charges for!

  3. 3 Chris

    I am starting a business that sends emails / text messages based on electrical / gas deviations from normal consumption. One of the ways I do this is through leveraging information from google power meter. Is anyone on this blog interested in a service like this? I am just getting started and need a few guinea pigs 🙂

    An example would be an alert that would come to you if your energy usage today (Wednesday) is 50% higher than your energy usage the previous Wednesday… We do much more, but this is a very useful example. Thanks.


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