British Gas Smart Meters – Part 1

After quite a bit of pestering and waiting I eventually managed to persuade British Gas to swap out my archaic Electricity and Gas meters for the latest ‘Phase 3’ Smart Meters.

This certainly was not an easy process and, despite constant bombardment of TV adverts on television from British Gas about how smart meters are the latest and greatest thing, you would not believe the hoops I had to jump through to get them installed, and, even after finally getting agreement from British Gas, it then took a number of months to get an installation date. This was followed by another wait between the Electricity and Gas meters due to a problem following the install of the Electricity Meter, there was an “issue with communication with the Head End”, which meant the engineer was forced to abort progressing with the install of the Gas Meter and the remainder of the work had to be rescheduled to a later date… 4 months later! Leaving me for a while with one Smart (Electricity) Meter and one Dumb (Gas) Meter, (this was not an issue for the supply of either utility but it just grated against my OCD / geeky / impatient nature).

To be fair to British Gas I think their initial reluctance to install Smart Meters was partly caused by a temporary stall to the UK Smart Meter roll-out programme [1] imposed partly by the Government changing their mind on the specifications for Smart Meters (or possibly British Gas, in an effort to be ahead of the game, had started rolling out Smart Meters too early [2] before the specifications had been fully finalised by UK Government?). I was also demanding British Gas install the latest ‘Phase 3’ smart meters which, as I understand it, are still really in teething stage, so, although frustrating at the time, I do have to forgive them the delays. I also can not fault their friendly staff putting up with my constant pestering!

Anyhow, a number of months later I am now here with a shiny new pair of meters! The ‘Phase 3’ smart meter setup comprises of 4 components:

  1. Landis+Gyr E470 Electricity Meter
  2. Landis+Gyr G370 Gas Meter
  3. Landis+Gyr P450 ecoMeter In Home Display
  4. Trilliant SEAP-2000-V Hub

Landis+Gyr E470 Electricity Meter

Landis+Gyr E470 Electricity Meter

According to the Landis+Gyr website the E470 is aligned to the UK Smart Metering Equipment Technical Specifications (SMETS). Of particular interest to me is its support for ZigBee Smart Energy Profile (SEP 1.1), it was my hope that I could buy a ZigBee gateway or USB receiver and I would then be able to start monitoring and logging my electricity usage on a computer. I later found out this was not going to be as easy as I thought.

Another feature the meter does have is a flashing LED which pulses a 1000 times for every kWh (or once for every Wh). This does allow me to hook a light sensor up to it to count pulses and therefore calculate Electricity usage but this, to me, seems a bit backwards when I have the state of the art Smart Meter with ZigBee!

The E470 supports both Import and Export electricity usage, so one day in the future I may be able to hook up some Solar PV Panels to it.

More information about the E470 can be found here:

Landis+Gyr G370 Gas Meter


Again aligned to the UK Smart Metering Equipment Technical Specifications (SMETS) the G370 Ultrasonic Gas Meter also supports ZigBee (SEP 1.1). Apparently with no moving parts this new meter is certainly quieter than our old meter.

There is no flashing LED (I assume because it is running on a battery not connected to any electricity power supply and therefore an LED would over time drain its battery).

The G370 and E470 do both have an optical probe (IEC1107) interfaces. A round circle about an inch in diameter with a UV LED and light sensor in the center, I am not an expert but I believe these interfaces are serial ports which use light to exchange information and with the right monitoring equipment can be used to access the smart meters and their data. I think their design is such that these interfaces are non-contact in that no electrical contact is made between the meters and the monitoring device (i.e it is via light) making them safe for Gas [3].

More information about the G370 can be found on the Landis+Gyr website.

Landis+Gyr P450 ecoMeter In Home Display


The P450 IHD, which appears to have been re-skinned with British Gas branding communicates with both the Electricity and Gas Meters and displays current Energy usage for both fuels as well as historic usage. The figures can be toggles between kWh, £s and CO2 values. The IHD can apparently also be used by British Gas to send me messages (there is a little Mail Envelope Icon) but as of yet I have not seen any messaged other than the initial “Welcome to Smart Metering” message.

Design wise the P450 is a quite pleasing shape and size, black with curved corners. However I am not so enamored with the responsiveness of the screen and its menus. You have to prod the screen quite hard or use a sharp object as a stylus to get it to respond, reminiscent of first generation Smart Phones, in this day and age of iPhones and super sensitive touch screens it is, at times, difficult to use. I can’t really grumble as it is better than what I had with the dumb meters but I am not sure how the older generation will get on with it if even I struggle.

On the back on the unit is a badge saying “ZigBee Certified Product” again giving me hope that ZigBee is becoming more mainstream.

There is also a Mini USB port on the back which is used to power the device (supplied with a 240V to USB power supply). I am curious what would happen if I plug the P450 into my computer? Would I be able to access it via USB? Or is this something which Landis+Gyr may later be able to enable?

More information about the P450 can be found on the Landis+Gyr website.

A user guide can also be found on the British Gas website.

Trilliant SEAP-2000-V Hub

Tying the above 3 units together is the Trilliant Hub, acting as a ZigBee coordinator, the hub gathers meter reading (and other information?) from both the Gas and Electricity meters and transmits them to the British Gas mother ship (Head End?) via the mobile phone network (the installation engineer said it contained up to 4 mobile SIM cards, one for each of the 4 main UK mobile providers but I am not 100% sure this is true as I thought British Gas only used Vodafone [4]).

The hub certainly looks busy with 3 little flashing LEDs constantly flickering away. I think British Gas can also push updates and settings, messages and firmware updates downstream towards the meters and IHD via the Trilliant hub as well as initiating remote shut off of energy supply to the homes (where people do not pay their bills!).

More information about the SEAP-2000-V can be found on the Trilliant website.

I am not seeing a massive benefit yet to having smart meters yet, other than no-longer having to manually send meter readings to British Gas and a funky In Home Display in my dining room giving me real-time usage. But over time I hope that more features and benefits may be unveiled.

What I really do not understand is the likes of claiming that utility companies (and the Government) are going to start using smart meters to spy on us and, even more extreme, that smart meters are frying our brains with radio waves, but I appreciate everyone has a right to their own opinion! I am a data geek and love stats, I am therefore happy to have a digital device monitor my energy usage… as long as I am permitted access to said data!

If you found this post of interest you may also like to read the blog of Jason Slater who has also written up a post on his experience getting smart meters installed.

21 thoughts on “British Gas Smart Meters – Part 1

  1. TrystanLea says:

    Hello James, thanks for sharing your blog post and sorry that I must have missed it the first time! its useful to have an overview like that, have you had any luck with getting data out of the system?

  2. James Saunders says:

    Hello Trystan,

    Unfortunately not! Following the above post, I subsequently wrote a second post about my experience after Smart Meter installation and my mission to get energy usage stats out of my smart meters:

    It would seem that at (least for now) the new Smart Meters from British Gas are a bit of a closed system where only British Gas can access ‘my’ stats.

    Access the the smart meters via Zigbee is blocked for “security reasons”, all that is offered to the consumer is the In-home Display device (which to be honest is a 5 min wonder with no way of getting at the real data). There are promises of an iPhone app but even this will only get the stats from British Gas’s servers (rather than directly from the meters in my house).

    I don’t know if the government should put more pressure on British Gas to allow consumers access to their own data.

    Even though I have so called ‘smart meters’ I may have to revert back to older techniques (pulse counting, physically noting readings) to monitor my Electricity and Gas usage (which defeats the point!).


  3. Schism says:


    Last night at the Open Source Awards I spoke to quite a few people who invariably assumed we were part of the Smart Meter Revolution TM … I have to admit I used you as a case study contrasting the open and closed approaches to data!

  4. Hertog says:

    In the Netherlands those smartmeters (electricity & gas)are going to be deployed nationwide (over a period of some 7 or 8 years I believe) starting next year. The gas meter in your pictures looks remarkably the same as the ones here. I opted in for an early placement. However, there seems to be one big difference between the UK and the NL and that is that ‘our’ smartmeters are mandatory equipped with a so called P1-port, which is customer readable. And quite easy so. It is fully documented , and I plan to rewrite my own hacked together perl-script to read it to something EmonCMS can handle.

    Long URL to official documentation: (… )

  5. Liz Bygrave says:

    I’m one of those people who think smart meters are going to ‘fry our brains with radio waves’ and having researched this area, do not consider this an extreme view. These meters emit a huge amount of electromagnetic radiation, and the non-thermal effects of EMR, which has been shown to be unsafe in thousands of independent studies, is not taken into account by the government and the utility companies. I’ve just discovered that a flat I was interested in buying had a gas smart meter installed last year. Unfortunately, this means that I won’t be going for it. My health is non-negotiable.

    • James Saunders says:

      Hi Liz,

      Thanks for your comment, it is good to get another point of view. I personally can’t see how having a smart meter is going to fry our brains any more than the mobile phone we have sitting in our back pocket but I would be interested to hear a little more about your research.

      At the end of the day the smart meter simply has a mobile phone SIM card installed inside it which transmits a tiny amount of data (equivalent to a SMS text message) every now and then.

      The only other radio transmitter inside the smart meter is a Zigbee radio which helps it communicate with the hand held display, this again is no different to your average cordless phone or baby monitor.

      Not buying a house because it has a smart meter seems a little extreme to me but I appreciate this is your view. Could you not simply go with a energy provider (if you are in the UK) who does not do smart meters yet and they would then have to either swap it back for a dumb meter or disable the ‘smart’ (radio) bit?

      Thanks again for your comment, I honestly do appreciate hearing peoples opinions.

      • cathie says:

        you come across as a very reasonable and tolerant person with a slightly inexplicable interest in utilities meters. this makes me smile, which is not usual in a search for installation info (specifically height restrictions) for gas meters … so, just to say thanks for lightening the mood 😉 happy christmas and all that

  6. smartofthehome says:

    Hi Hertog,
    It sounds like you are lucky in that in NL your smart meters have the manditory P1 port, unfortunately in the UK they have opted to remove this port 🙁 are your Gas meters also G470’s or different model number?
    Nevertheless, I would be very interested to see your perl script.
    All the best,

  7. jeremfg says:

    The radio energy sent by a ZigBee radio is 100,000 of times less powerful than a cordless phone… And you don’t keep a smart meter beside your brain like you do with a phone…
    Believe me, your microwave oven is way way way more dangerous than a smart meter, working on the same frequency!
    We conducted experiments in our office, and the only major spike we detected were when someone’s cell phone in his pockets was ringing! Even though we have hundreds of meters and radios currently operating in our labs!
    We don’t feel threaten, and we understand the technology… You shouldn’t feel threaten!

  8. Anita says:

    Hi. I’m thinking of getting smart meters installed but only have limited space for the gas meter.  Does anyone know the dimensions of the Landis + Gyr G370 please?  Thanks

  9. Eric says:

    Has anyone had problems with signal from the meters to the monitor?. BG’s blurb says that it can detect at 30M plus 2 walls. Mine fails at 4m and 2 walls but I cannot get BG to agree that there is a problem or to try a different montor .

    • Eric Millward says:

      BG have arrived to investigate my signal problem. They replaced the monitor and reset the network connection saying taht if the new monitor does not work there must be a network problem. 5 minutes after they left the connection was lost. I live in the Manchester area UK and all mobile networks have excellent signal strength here. My monitor is useless.

  10. Vinnie Grasby says:

    I had a smart meter fitted 18 months ago. Landis+Gyr E470 electric and G370 gas. British Gas monitor. All worked fine until 3 weeks ago. The monitor will not connect to the meters. I get a message “connecting to the meter..” and that’s it. I have a 5 bar signal strength. The trilliant sensor has 3 LEDs. WAN LED does nothing, HAN flashes continuously power LED is steady. There is no display at all on the gas meter. I changed supplier 6 months ago and they do not support smart meters so I am unable to supply readings for gas usage.

  11. Amy says:

    I have recently moved into a property with these meters installed. Does anyone know roughly the energy costs you pay on average either monthly or annually? and if you can switch provider and stop using the smart meters and go to standard meters on a monthly tariff?
    Thank you!

    • James Saunders says:

      Hi Aimee, the cost of electricity with or without Smart Meters is the same, the main difference if that with Smart Meters you don’t have to submit readings, a meter reader does not need to come out and the energy supplier does not estimate. Readings are sent automatically so bills are more accurate.
      As for how much your monthly tariff would be… this is unique to you… I.e it depends on how much electricity you use, TVs, dishwasher, lights, shower etc.

      • Phil Lee says:

        Hi, at one point British Gas, using the ability of knowing when power was being used (what day/time) had a tariff that gave you free electricity on either a Saturday or Sunday each week (only 9-5). I think they have stopped this now.

  12. Terence Seal says:

    I had smart meters fitted 3 years ago by British gas,I have had 3 Trilliant tranceivers fitted and The 4th one has failed,I changed suppliers just before the last one gave up and they do not fit smart meters so do not want to know about my problem.

  13. Reg says:

    had smart meter for few years now model Landis+gyre470 elec meter Landis+gyrg370gas meter elec reads 90000£used a day gas 20p a day rang b\ gas they say meters read normal their end and says monitor will right it self? Thanks reg

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