Basic Single Phase 120 Volt kWh Meter, Pass-Through, 2-Wire (1 hot, 1 neutral), 50A, 60Hz, EKM-15IDS

120 Volt Pass-Through kWh Meter, 2-Wire (1 hot, 1 neutral), 50A, 60Hz, EKM-15IDS - EKM Metering Inc.

Basic Single Phase 120 Volt kWh Meter, Pass-Through, 2-Wire (1 hot, 1 neutral), 50A, 60Hz, EKM-15IDS


Qty Price
1 - 9 $90.00
10 - 19 $84.15
20 - 49 $75.15
50 - 99 $66.15
100 - + $57.15
Basic 120V, 2-Wire, 50A, kWh Meter.Read locally on the LCD display or via pulse output.  

Voltage: 120 volts

Amperage: up to 50 amps

Type: Pass-Through, Single-Phase, 60Hz

Data: Pulse Output - 800 pulses per kWh

Model: EKM-15IDS

Our EKM-15IDS is a revenue grade kWh submeter. It is great for metering any 120 volt load to a high accuracy required for billing purposes or just for tracking usage. This meter provides an excellent value if you are looking for a simple, read-off-the-face meter. Very reliable and easy to install. This is the 120-volt-only version of our EKM-25XDSE.

State-of-the-art, fully solid-state kWh meter with 800 pulses per kWh pulse output

Accurate to within 1%, LCD readout in hundredths of a kWh, to 99999.99 kWh. No conversion factor or multiplier needed.

Compact, very easy to install design. Simple DIN-rail mounts. Wires pass through 3/8+" diameter tubes in the meter body--Will accept some (but not all) #2AWG insulated wire. The only electrical connection is made by 2 small screws which penetrate the wire insulation and pick up power for the meter and give the meter its voltage reference. This meter draws less than 1 watt.

Non-resettable LCD display. Usage data is stored even if the meter loses power for 10 years. Tamper-proof and meter sealable.

Single-phase energy meter, 50A 120-volt 2-wire 60Hz

Most commonly a white neutral and a black or red hot wire, 110V to 126V between them.

Perfect for knowing how many kWh your apartment, office, RV park, industrial space, etc., uses from their 120 volt electrical system (2 wire – 1 hot, 1 neutral).

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.

Spec Sheet: EKM-15IDS Spec Sheet


Ask a Question
  • can the EKM Push work with this model?

    The EKM Push can only work with our line of Omnimeters (smart meters).  The EKM 15IDS is a basic meter and does not have communications to the EKM Push.  The EKM Push is designed to support all of our Omnimeter models.

  • The electrical connection is made by 2 small screws which penetrate the wire. What needs to be done to the wire when the unit is removed? Does the wire have to be replaced so there are no holes in the insulation?

    First make sure to use stranded copper wire for the wire that passes though the meter.  Second, when you remove the meter from the wires, inspect the wires to make sure that they are intact and have not been compromised by the meter piercing screws.   Then wrap the affected area where the piecing screws pierced this insulation with several layers of quality electrical tape.

  • How can i prove the local utility dept. Is stealing money from our household.

    If your utility company meter is inaccurate, you can use our meters to prove their meter wrong.  If it were me, I would use one of our EKM Omnimeter models to prove this.  Our Omnimeters are 0.5% accurate, whereas many utilities are only required to have meters that are 2% accurate.  We have had customers use our meters to fight their utility companies and win.  There was even a case of a customer who took his evidence that he collected using our meters, to his local radio station (I think it was in Costa Rica).  He proved that he had been getting scammed, 3 utility executives went to jail as a result.

  • I need to meter the 110VAC in 15 RV storage garages. Is this the right unit for that project?

    Yes, the EKM 15IDS will work for your project if:
    1. Your wires are under 3/8" in diameter
    2. The amperage is less than 50 amps
    3. You have easy access to your wires and can pass them through the holes in the body of the meter
    4.  You are happy with reading the kWh on the face of the meter (rather than with a computer or over the internet)
    5.  The wires you are measuring are stranded (not solid) core

  • Will the meter turnover to zero after it reaches 99999.99 kWh?

    If the meter records more than 99999.99 kWh, which is the maximum that will display on the LCD screen, it will roll back to 0 and continue metering like a new meter. The meter will continue to work without any problem.

  • will the EKM-15IDS do it's job if i wire it to the load side of a square D contactor relay? What if the load side has multiple terminals that could be all live at once?

    Whatever wire that you pass though, and pierce with the voltage tap screw, will be the what the meter measures. In the case that you mentioned I would put the meter on the supply side of the contactor relay so the meter is not constantly turning off and on depending on the state of the relay. Provided that the meter has the voltage reference connection, it will increment kWh but only when current is flowing through the wire.


    The wires that pass through this meter need to be 9.5mm in diameter or less, in order to fit. 2/0 wires are commonly 15mm in diameter so they will not work with this meter. You would need to use our Omnimeter I v.3 with an external Current Transformer in order to meter your 2-wire single phase system.

  • Used last night to charge golf cart. Meter reads 7.02 is that 7 kilowatt hours?

    Yes, this meter model only displays kWh. There is no multiplier needed so if the LCD screen shows 7.02 it means 7.02 kWh.

  • Good day, I like to use this in a small shed. What is the temperature operation range. We get around -40 degree Celsius in Winter and +40 degree Celsius in summer. If you wonder where that is. It is a city call "Winnipeg" in Canada. Thanks

    The rated temperature range for this meter is -30ºC to 70ºC. That said, it should be fine in a -40ºC ambient temperature environment, provided that it is insulated and remains moisture free. You could also run a small lightbulb in the meter's enclosure, as a heat source, just to be sure.

  • The circuit I want to install this to has a black (hot) wire, white (neutral) wire and a ground wire. Do I need the 2 wire or 3 wire device?

    The meter (the EKM-15IDS) or the EKM-15E are suitable meters for the system you've described. These are 2 wire devices. Ground is not necessary for these meters to function.

  • I have a client that needs to monitor a load to a 120V EV Charger. I assume this would work just fine?

    This meter will work well, provided that:
    1.) your client's charger is 120v, 2-wire (one hot, one neutral)
    2.) the charger draws less than 50 amps
    2.) their wire diameter is less than 3/8" in diameter
    3.) their wire are able to route through the body of the meter
    3.) all they want is a Total kWh reading on the meters LCD screen

  • How many circuits can it be hook too?

    This meter is designed to meter one 120V circuit.

  • Here's an idea: Add Bluetooth to this unit to send info to my smartphone to let me know when something turns "on" or "off". I have wifi that will accept the signal. I installed a new ejector pump in my basement and I would like to know (on my cell phone because I'm not in the basement all the time) when it turns on or off. I need a certain comfort that the new unit is working or not working. If I could plug the ejector pump into this Bluetooth unit and plug this unit into the electric service, it could send me a signal that the ejector pump is working.

    We like the idea of bluetooth and have been considering it for a future meter model. However, this would be significantly more complex meter than the 15IDS or 25XDSE models we offer now. Our best solution for doing what you want at this point would be our Omnimeter I v.3 and EKM Push metering system. This system combines the meter (Omnimeter) with our cloud based data system (EKM Push) to send meter data to the cloud. This would allow you to check your phone to see if your injector pump is on. Our Widget provides one way to view data on a mobile device like your cell phone. So you may be able to accomplish what you want without bluetooth.

    That being said, this system doesn't currently have a way to alert you when your injector pump turns on or off, although we are working on adding this functionality to the system. In other words, if you checked your cell phone it would tell you if your injector was on or off but it would not prompt to do so.

  • Can this meter cause a high reading > some variable amp load, cause one or more CBs to disconnect by throwing a switch between the CB and the path to all or just one spot on it?

    If I'm understanding you correctly, it sounds like you would like a meter that will flip a breaker based on a specific load profile. Is this the case?

    If so, this is not the meter you would use. Our Omnimeter Pulse v.4 has 2 controllable outputs that can be triggered remotely to turn on/off a relay. That being said, we don't currently have a complete software and hardware solution to accomplish this, although we hope to have something better soon. We need to add this capability to the triggering functionality of our EKM Dash software. Stay tuned.

  • The city installed AMR meters through out the area, our bills have doubled since then, I had a newer meter which was a digital read and we read our own meters, can this be hooked up in line with a 100 amp breaker coming out of the meter box to track Kilo hrs?

    If the system you are trying to meter is 120v 2-wire (1 hot, 1 neutral), then this meter is a good option up to 50A. However, it sounds like the circuit you want to meter is 100A, so it may not be appropriate.  Wires also must pass through the body of the meter so you need good access to the appropriate wires, which may or may not be tough in your breaker panel. Be aware that most North American residential electrical systems are 120/240v (2 hots, 1 neutral), so if you're trying to meter the whole system this may not be the meter you need. EKM's basic 120/240v meter is the EKM-25XDSE.

    If you do need a meter for a 120v, 100A system, then I would recommend the Omnimeter I v.3 and one appropriately sized Current Transformer (CT) (1 CT for a 120v system, 2 CTs for a 120/240v system). In general, using an external CT meter also allows for easier installations because you only need to install the CT around the wire, not the entire meter.

  • Will this work outside?

    This meter will work "outside" provided that it is installed in a watertight enclosure of some kind. Enclosures are available here but any watertight enclosure should work. The meters are mounted on 35mm DIN rail which is included with the enclosures available on EKM's website.

    It is important to point out that none of the electric meters or communication devices that EKM offers are natively water resistant. They all need to be installed indoors or in some type of enclosure that will protect them from the elements.

  • In a shared neutral situation.. does the device read the neutral leg , along with the one side ? Or does the neutral just provide the circuit completion for the device to operate ?

    This particular meter model only has 1 internal CT on the hot wire.  It will only meter the current in the hot wire, it will not meter the current in the neutral wire.

    In 120 volt 2 wire electrical system, you do not need to meter the current in the neutral wire for the meter to be accurate.

  • I need to keep 3 batteries in an RV on trickle chargers when stored for extended times. Can the male end of an extension cord be separated to pass through this devise, then plug it into a receptacle and then plug the chargers into the female end of the extension cord?

      Yes, you could install the meter inline on an extension cord. Install it on the individual hot and neutral wires. You would have to cut these wires and then reconnect them after passing them through the meter, if you use the 15IDS. We recommend putting it inside one of our watertight enclosures.    

  • Can I connect the ekm-15ids meter to any wall socket and measure the energy used there?

    Yes, the EKM-15IDS can be used to meter an individual 120V (1 hot, 1 neutral) socket if you are able to pass the hot and neutral wires though the body of the meter, and if the socket draws 50A or less. In order for the wires to pass through the meter they need to be 3/8" in diameter or less.


    Thanks for the inquiry.  The EKM-15IDS meter simply displays your latest, Total kWh. This is your Total kWh, which is a cumulative read - the same way that a classic electric meter would read. 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.

  • Can you use this on a 30 amp?

    Yes. This meter designed to work on systems up to 50 amps, so it will work well on a 30 amp system.