Single Phase, Pass-Through kWh Meter, 2 or 3-Wire, 120V up to 120/240V, 100A, 60Hz, EKM-25XDSE
Voltage: 120 volts 2-wire, 240 volts 2-wire, 120/240 volts 3-wire
Amperage: Up to 100 amps
Type: Pass-Through, Single-Phase, 60Hz
Data: Pulse Output - 800 pulses per kWh
This new meter model has been designed to replace both of our legacy single phase pass-though kWh meters (EKM-25IDS and EKM-15IDS). The EKM-25XDSE replaces the functionality of both of these legacy meters and offers a number of additional improvements to their designs.
Compact and very easy to install. Simple DIN-Rail Mounting. Wires pass through 13.7mm (0.5 inch) diameter tubes in the meter body -- Will accept 22 AWG – 1 AWG wire. There are two piercing screws that pierce the wires that pass through the meter. The meter comes with two sets of bushings for medium and small wire diameter wires, which keep the wires centered so the piercing screws have no trouble engaging the conductor. The upside-down teardrop shape of the tubes also serves to keep the wires centered.
Single Phase 120/240V 3-Wire (2 hots, 1 neutral):
In this configuration both hot wires pass through the body of the meter. The piercing screws are used to pierce the wire insulation to provide the meter with a voltage reference for each line. There is also a port on the meter for a neutral reference. The meter will function without this connection (at ~1% accuracy) but it will be 0.5% accurate with the neutral connection.
Single Phase 120V or 208-240V 2-Wire (2 hots):
As described above, the meter is designed to meter single phase electrical systems that don't have a neutral available. Both hot wires pass though the body of the meter and the piercing screws are used to pierce the wire insulation to provide voltage references to the meter.
Single Phase 120V or 208-240V 2-Wire (1 hot, 1 neutral):
In this case Line 1 passes though the tube marked L1. The piercing screw is used to pierce the wire insulation for L1 to provide the voltage reference to the meter. The Neutral reference can either pass through the Tube marked L2 or it can be connected to the port marked N. If the neutral passes though the L2 tube then the piercing screw is used to pierce the wire insulation for to provide the neutral reference to the meter.
State-of-the-art, fully solid-state kWh meter with 800 pulse per kWh pulse output.
0.5–1% accuracy dependent on setup (see above), LCD readout in hundredths of a kWh, to 99999.99 kWh. No conversion factor or multiplier.
Non-resettable LCD display. kWh data is maintained through power outages, and for up to 10 years without power.
For more information about our products and services, we encourage you to visit our online Knowledge Base, which provides spec sheets, videos, tutorials, FAQs, diagrams, and more.
QUESTIONS & ANSWERSAsk a Question
Is it ok to use on stranded copper wire ?
Yes, you should always use stranded wire (including stranded copper wire) with the EKM-25XDSE. This is because when you pierce the insulation with the voltage pickup screws of the EKM-25XDSE, the piercing tap will embedd itself into the stranded wire. If you used the EKM-25XDSE on a solid wire, it could dimple the wire and cause a weak spot in the solid wire.
I have a full phase (two hot, 240V) with neutral, does that mean I can’t use the pass-through wattmeter?
If you have 2 hot wires and a neutral
If you have 2 hot wires and a neutral and a ground
If you have 2 hot wires only
Your voltages are anywhere between 100V minimum, and 250V maximum
Your amperage does not exceed 100A
Your wires are not thicker than 0.5 inches diameter
- then you should generally be fine using this meter.
If you do not have easy access to your hot wires and want to use CTs
Or if you want to read the meter on a computer
Or if any of the above specs do not match your system
- then you will likely need one of our Omnimeter models.
For more specifics, contact us directly: https://www.ekmmetering.com/pages/contact-us
Thanks, Seth - EKM Metering
Do you guys make a meter like this with a memory to log power usage at certain dates?
The best for this, is any of our EKM Omnimeters coupled with the EKM Push system:
EKM Push: https://www.ekmmetering.com/collections/meter-reading-solutions/products/ekm-push3-bundle-cloud-data-control-system
The Push reads your meters and both logs the data to the cloud as well as logs the data locally on the gateway. You can then use this data to see exactly what happened on any given date and time (or time range) that you specify with a variety of tools: www.encompass.io, the EKM Widget, the EKM Dash software, or the open APIs.
Will this hold usage so I can keep monthly records?The EKM-25XDSE meter simply displays your latest, Total kWh. Your Total kWh is a cumulative read - the same way that a classic electric meter would read, and this is what you are billed on. Just read this each month, for instance, and subtract last month’s read from this month’s read to get your total for this month.
Even if power goes out and then later comes back on, this meter will continue from where it left off. It is not resettable.Note the decimal point on the display of the EKM-25XDSE: 00000.00 -- the two digits to the right of the decimal are tenths and hundredths of a kWh, respectively.You can then multiply your total for the month by the rate per kWh your utility charges you -- you will find this info on your utility bill. This will give you your charges for the month for the electricity used through this meter.Also, this assumes a flat fee schedule - that you are not charged different rates at different times. For a more advanced metering system that can be set up to take different rates into account, check out the Omnimeter I v.3 here:
Can this meter be used to monitor an individual (traditional double) outlet? Can one install it themselves to do so?
Yes, the EKM 25XDSE is able to meter any load from 0 amps to 100amps. So it will work on your wall outlet. The issue will be whether or not you have good access to the wires that lead to the outlet and are able to pass these wires through the body of the meter. If not, it will probably be easier to use an external CT meter. If your socket is 120 volts, then our EKM 15E might work for you, or if your socket is 120/240 volts or you want more capabilities from your meter, then one of our EKM Omnimeters may be a better solution.
Yes, a handy person who knows their way around electricity should be able to install any of these meters on their own. We have good installation instructions on our website in the form of documents, videos, etc. Many handymen, electricians, and competent homeowners have installed all of these meter models themselves.
Are there 2 CT's (current Transformers) in this model?
Yes, the EKM-25XDSE has 2 current transformers internally that go around the tubes that pass through the meter, you need 2 CT in order to be accurate on a North American 120/240 volt 3-wire residential system (the most common system in North America). Many other cheap pass through meters only have 1 internal CT, they seem to work, but will never be accurate on a 120/240 volt 3-wire system.
can i use this meter to monitor a public utility meter for accuracy?
You can use any of our electric meters to measure the incoming electrical service to your building right after the utility meter (as long as the meters meet the specs). In this case you would be metering the cables right before they go into your main panel. If you suspect that your utlity meter is not accurate and you want to prove this, then I would probably recommend one of our Omnimeter models instead (because they are certified to be accurate, which will be harder to argue with the results, if our Omnimeters are more accurate than the utility meter, submeters are held to a higher accuacy standard than utility meters in most cases). The other reason to use an Omnimeter is that they use external CTs, and so will probably be easier to install on the cables that feed into your main electrical panel.
Can I use this to Monitor the output of my solar array
Yes, you can use the EKM 25XDSE to monitor the output of your solar electricity system. You would install this meter on the output of your solar inverter (on the AC side). It will tell you how many kWh are produced over time. It would work well if you just need a simple read on the face meter that only tells you the Total kWh over time.
If you want to have more features or the ability to see the usage with a computer, I would recommend one of our EKM Omnimeters instead. When connected to a computer or the EKM Push system, you get a lot more data from an Omnimeter and can better track your solar energy system over time. For example you can see Net Watts in real-time (with the Omnimeter Pulse v.4) when installed as a net meter, or Total kWh or Reverse kWh over time.
Viendo de frente este medidor , La entrada de los cables es por arriba o mide igual si entra por abajo
Translation (Google Translate):
Looking at this meter from the front, the cable entry is from the top or measures the same if it enters from the bottom
Answer (Google Translate):
El EKM 25XDSE es un contador eléctrico de paso. Los cables que está midiendo pasan por todo el cuerpo del medidor. Los cables no se detienen ni terminan en el medidor. Consulte las imágenes de esta página para obtener más información.
The EKM 25XDSE is a pass-through electric meter. The wires that you are measuring pass all the way through the body of the meter. The wires do not stop or terminate at the meter. Please see the images on this page for more information.
I need to monitor a single phase 120 volt circuit that gets as low 110 volts. Will this meter function at this low voltage. If not what is the lowest voltage it will function?
Yes this meter has no problem functioning at 110V AC and will function at as low as 84V AC without a problem.
Do you sale a outdoor enclosure kit to complement this ? Thanks
Yes, here is the outdoor enclosure kit for this meter:
All our enclosures:
Are your product The EKM-25XDSE has approved by the Canadian Safety Association? until to MAY 23 2021, I really need this model now.
The EKM 25XDSE is not CSA or cUL approved. We do have 2 models of electric meter that are cUL (Canadian UL, which is exactly the same certification as CSA that you mentioned) listed. These are the Omnimeter II v.3 UL and the Omnimeter Pulse v.4 UL
Here are the cerfitications our meters have
Do I need an enclosure for an inside installation next to the electric panel?
We recommed this enclosure, which can be installed on the wall or flush mounted in the wall, to protect the meter:
My solar is feeding the utilities grid. Their meters bill you if you are back feeding their grid or pulling from the grid. It just senses current flow regardless of direction and bills you. Does your meters read the same or only one direction. Need to prove to 3rd world utility the situation with data.
Yes, any of our Omnimeter models of electric meters will keep track of Total kWh and Reverse kWh (we use these to derive both Forward kWh and Net kWh). So they can tell you exatly how much energy has been imported from the grid and exported to the grid.
The EKM-25XDSE would not be an appropriat meter for this though.
Here is a link to all of our Omnimeter models: https://www.ekmmetering.com/collections/smart-meters
You can use any Omnimeter model, but for solar net metering I would recommend a v4 meter because in addition to Total kWh and Reverse kWh, it will tell to the direction of current on each line in real-time. This is nice for showing you how many watts you are producing or consuming in real-time. Here is a widget that shows this from an Omnimeter Pulse v.4: Net Metering Solar Widget
Can you reset the meterBecause our meters are made to be revenue grade they cannot be reset. This prevents someone who is being billed with our meters from resetting the data and so not being charged for their full usage. The meters just work like a classic meter - the reading is cumulative.We do carry the OmniMeter Pulse v.4 meter, however, which has the non-resettable kWh reading but also a separate resettable kWh reading as well.More info here: https://help.ekmmetering.com/support/solutions/articles/6000058136-ekm-omnimeter-pulse-v-4
Will it work with stranded copper wires?
Yes, the EKM 25XDSE will work well with stranded copper or stranded aluminum wire. In fact we only recommend using it with stranded. We do not recommend using it with solid wire, because the piercing tap can sometimes kink the solid wire, which creates a weak point in the wire. So yes, plesae use stranded wire.
Does this meter work well with the waveform produced by typical backup generators?
Yes, the EKM-25XDSE will work well to meter your backup generator output.
I have 2 RV's connected to one electrical meter. What product can I use to know how much kilowatts have been used by each individually?
If you are good with a basic meter that you can just read on the face, then the EKM 25XDSE could be a really good fit for you. You can use these meters to separate the usage of each RV. It would be a good idea to get one meter for each RV.
If you want to have a more advanced system with meter data being sent to your computer or to the internet, then I would consider an EKM Omnimeter with the EKM Push system.
EKM-25XDSE How does the pulse output monitoring work? How/what do you install for the pulse monitoring?
The Basic Pulse Output of all of our electric meters is a non-powered open/close switch (though solid state - not a mechanical relay). Electrically the Pulse Output is very similar to the closing of a dry contact switch, such as a Reed switch.
Pulse width: 90msCompatible voltage (the meter itself does not put out a voltage): up to 27V maxCurrent range the meter's pulse output can handle: ≤27mAThe EKM-25XDSE pulses 800 times per kWh. Or: one pulse per 1.25 Watt hours (its little red LED will flash as well with each pulse).
You could potentially wire this pulse output to some kind of basic pulse counter that would put that low voltage on the line and count how many pulses were created, and you could then translate that into total kWh metered. However we generally recommend our Omnimeter line of meters instead if you need data output, as you can take advantage of our Push system, for instance, to get all kinds of great data delivered to your computer.
Thanks - Seth, EKM Metering
What are dimensions
Here is a link to the spec sheet for this meter.
The dimensions of the EKM-25XDSE are:
Are your products approved by the Canadian Safety Association?
Our Omnimeter II v.3 UL and our Omnimeter Pulse v.4 UL are both UL and cUL (Canadian UL) listed. These are tested and certified to the exact same 61010-1 safety standards as CSA (Canadian Safety Association) and can be used in Canada without issues. We have a lot of customers in Canada that use these meters. Here is more information about our certifications.
The EKM-25XDSE is not UL listed or CSA approved.
I would like to install a submeter to determine how much electricity teh suite in my house is using. Would I use a 120V meter or a 240v. Or does it make any difference. Someone else said I should use a 240v but I am concerned that since we use 120v here that the meter will only show 1/2 of the actual electricity used. I am in canada.
For this install, the EKM 25XDSE would work well for you. I assume you have 2 hot wires and a neutral wire, what we call 120/240 volt 3-wire. The voltages you measure depend on which wires you measure between. If you measure between the 2 hot wires you will get ~240 volts, if you measure between either hot wire and neutral, you will get ~120 volts. This is the most common residential system in the USA. Is this what you are seeing in your electrical system? The EKM 25XDSE will work for you because it has 2 internal CTs and can accurately meter an USA residential unbalanced load.
I am planning to install this unit in an area where the temperature can fall well below freezing. Can the LED screen handle the low temperatures?
Yes, I dont think you should have any trouble at all, we have never had trouble with the LCD screens or our electric meters in general due to the cold. We have them installed all over the world, including very cold environments (particularly in Canada and Alaska). They are rated to -30°C to 70°C (which is -22°F to 158°F). Here is the spec sheet for this meter.
Can I use it to run a 240 v laundry dryer
Yes, you can use the EKM 25XDSE to meter a 240 volt dryer. Your dryer will either have just 2 hot wires or 2 hot wires and a neutral wire. This meter will work in both situations. Here is the spec sheet for the 25XDSE.
Does this item show thru current, or only the total of kwh's? I would like to bee able to see the flow of current. Thanks
The EKM-25XDSE only shows the total kWh. Our Omnimeter models, however, do cycle through various display values - including Amps (current).
What is the voltage of each pulse?The Pulse Output of all of our electric meters is a non-powered open/close switch (though solid state - not a mechanical relay). Electrically the Pulse Output is very similar to the closing of a dry contact switch, such as a Reed switch.Pulse Output Specs:Impulse width: 90msCompatible voltage (the meter itself does not put out a voltage): 27V maxCurrent range the meter's pulse output can handle: ≤27mAThese pulse 800 pulses per kWh, so this means that for every 1.25 Watt hours there will be a pulse from the meter (its little red LED will flash as well with each pulse).
I need a rain tight enclosure for this meter or is it men’s 3R?
Both of our watertight Enclosures will work well for this meter model.
I would like to install the meter below a panel box before the wires exit the building, so the hot wires from the breaker would need to enter thru the top of the meter. I see arrows on the meter that are pointing bottom to top. Can the two hot wires be installed in either direction, as long as the current in both is flowing in the same direction?
Yes, in the case of the 25XDSE and the EKM 15E, you can install the wires in either direction. With the 25XDSE, as long as the wires are going in the same direction through the meter, you should be good. This is not true for our Omnimeters where the direction does matter.
Do you make a meter like this that is resettable?
Hello, the EKM-25XDSE does not have a resettable kWh. You would just manually read the kWh value at the beginning of the billing period and subtract it from the kWh value at the end of the billing period. One alternative would be to connect the EKM-25XDSE to an 8 digit pulse counter, the 8 digit pulse counter has a way to reset the count to zero.
Is this unit CSA approved for Canada
No this electric meter is not CSA Approved for Canada, it also does not have a UL Listing or a cUL listing (which are the same as CSA approved). For this we have these 2 electric meter models which are both UL and cUL (Canadian UL) listed: EKM Omnimeter II v.3 UL and the Omnimeter Pulse v.4 UL
Do they make a box to install this in
This meter will fit in any of our enclsoures:
Are these certified to be used in Canada?
These meters do not have any Canada-specific certifications. If you need Canada-specific certifications, check out our Omnimeter II UL v.3 meter instead, which has CUL/CSA certification. It uses external CTs (sold separately).
Is this meter a Certified California type meter?
This meter does not have any California-specific certifications. It sounds like you may want to check out our Omnimeter I v.3 or the Omnimeter II UL v.3 for meters with California Type Approval for Revenue Grade Metering:
What is the size of the biggest conductor it will take?
This meter can accept wire with up to a 13.5mm outside diameter. Generally this means it can accept up to size 1AWG, though some 1/0 wire may possibly work if you can measure and confirm it is thin enough to pass through.