Jim ‘Slim’ Mimlitz, SCADAmetrics

The Honeywell (Elster) evoQ4 is a very popular magnetic flow meter in use throughout North America.  It is available with an Absolute Encoder Output signal, pulse signal, or both.  At time of purchase, the AMR encoder signal may be specified as either “Elster K-Frame” protocol or “Sensus” protocol.

Honeywell (Elster) evoQ4 Magnetic Flow Meter.

If you would like to connect an evoQ4 to your SCADA, Telemetry, or Building Automation system — the SCADAmetrics EtherMeter® is the perfect tool to help!… as the EtherMeter can translate Elster (or Sensus) protocol meter readings from the evoQ4 into Modbus, Allen-Bradley EtherNet/IP, and Allen-Bradley DF1.

The following diagram illustrates connection of an evoQ4 to an automation system. Please note that the EtherMeter may be connected to the evoQ4 using the AMR encoder signal, the pulse signal, or both encoder and pulse (shown):

Connection of an evoQ4 to an Automation System via SCADAmetrics EtherMeter.


In certain instances, the evoQ4 is already connected to the Water Utility’s AMR/AMI system.  However, with the use of a SCADAmetrics Duplexer, this is not a problem.  The following diagram illustrates how an evoQ4 may be “co-metered” by both the Water Utility and an Automation System. Please note that the EtherMeter may be connected to the evoQ4 using the AMR encoder signal, the pulse signal, or both encoder and pulse (shown):

Connection of an evoQ4 to an Automation System via SCADAmetrics EtherMeter, with Utility Co-Metering.


To assist EtherMeter/evoQ4 users with integration, we have also published an Application Note HERE.

To read about the evoQ4 AMR encoder signal option modules, click HERE.

To review our table of evoQ4 meter reading resolution versus size, click HERE.

To review additional wiring information contained in our 2009 blog article about the evoQ4, click HERE.


Are you interested in how SCADAmetrics technology can help connect your evoQ4 magmeter to your SCADA, Telemetry, or Building Automation System? Give us a call! We’ll be glad to discuss the details!

About Jim 'Slim' Mimlitz

Licensed Professional Electrical Engineer @ SCADAmetrics. Specialties: Connecting Flow Meters with SCADA, Telemetry, and Building Automation Systems. Electronic Circuit Design, Software Development.

3 Thoughts on “Connecting the Honeywell (Elster) evoQ4 MagMeter to your Automation System with an EtherMeter

  1. We are using 10-inch diam. evoQ4 water meter connected to encoded type Itron ERT100W+encoder 1300-403 and, plan to connect SCADA pulse output EtherMeter on the same meter.

    Kindly provide us your with expertise details how to do it.

  2. We are using 10-inch diam. evoQ4 water meter connected to encoded type Itron ERT100W+encoder 1300-403 and, plan to connect SCADA pulse output EtherMeter on the same meter. There is only one cable with three ports coming from the evoQ4, do we have to connect the EtherMeter on the same cable?

    Thank you and lease provide us the details how to do it and the financial requirement that you require?

  3. Hi Adams,

    Thanks for reaching out with your metering project.

    In situations where the evoQ4 has only the 3-wire encoded signal available, and where that encoded signal is already in-use connected to an Itron ERT — we offer a nice solution for your SCADA connectivity:

    You would need to run the evoQ4 signal into one of our Duplexers (either model SDA or model SDAW) to split the encoded signal. One output from the Duplexer would go to the Itron ERT. The other signal from the Duplexer would go to the Model EM.100 EtherMeter.

    Basically, the wiring would be the same as above, except you would not have the extra pulse wire connection to the EtherMeter.

    The evoQ4 encoded signal output (3 wires) can be either “Elster Protocol” or “Sensus Protocol”. The EtherMeter is capable of reading both protocols, so there would be no problem with compatibility.

    And Sorry for the late reply! I should have noticed your blog question earlier!

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