8-channel monitor/logger for pulse, current loop, and voltage output meters/sensors




The Z3 controls NetMeter-OMNI is a sophisticated and yet simple to use module intended for monitoring and measuring sensors, pulse meters, and other devices that produce a voltage (from 0 up to 24V), a current (0-20mA, 4-20mA), or a pulse (such as KYZ contacts or a voltage or current pulse).

This includes sensors such as:

  • Temperature
  • Pressure
  • Flow, Flow rate (water, air, gas, etc)
  • Proximity
  • Light

The hardware provides 8 independently programmable channels that can be configured for either voltage or current mode. Furthermore, the function of each channel can be selected as analog, digital, or pulse:

NetMeter-OMNI Input Functional Diagram (1 of 8 Channels)
  • Programmable threshold/hysteresis voltage/current for digital and pulse mode
  • High resolution analog-to-digital conversion
    • 1mV resolution in voltage mode
    • 1uA resolution in current mode
    • 48 Bit pulse counter
  • Input over current protection
  • Can be field upgraded
  • DIN mounted module


Since the NetMeter-OMNI is accessible using a standard web browser, it requires NO software to be installed on your computer!  Instead, the integrated Gateway has a built-in web server that utilizes Web 2.0 techniques enabling a highly interactive, real-time user experience. This eliminates the headaches of installing special software and drivers to be able to use the device. 

The following capabilities are provided using the built-in web server:

  • Real-time sensor data updated every second
  • Flexible channel configuration:
    • Display name and units as desired
    • Convert voltage, current, or pulse count into engineering units
    • Display pulse accumulation as absolute or as a flow rate
  • Graphical display of historical data with dynamic pan/zoom control
  • Download data as text file for external processing
  • Ability to query data using a published API
  • Easy integration with BAS/SCADA via Modbus TCP or API
  • In-field firmware update
  • Contextual links to online help

NetMeter-OMNI ilog.html Widget

Open Platform

Z3 provides a documented Application Programming Interface (API) and HTML "widgets" based on a cost-free license. It allows users and 3rd party developers to easily integrate the Z3 data into their custom application:

  • Generate reports that consolidate enterprise-wide energy assets
  • Combine energy data into integrated displays of information important to business operations (dashboards)

With the Z3 API, real-time and historical energy data is available to almost any modern programming language and using standard Web 2.0 programming techniques such as HTML, Javascript, and AJAX.


System Diagram

Example System Diagram for Commercial/Industrial Applications




Product Briefs
Title Type Size Date Note
NetMeter-OMNI-8C Product Brief 2.4MB 2014-02-02
User Manuals
Title Type Size Date Note
NetMeter-OMNI-8C Installation Manual 3.4MB 2014-02-19
NetMeter-OMNI-8C Modbus Manual 263.7KB 2013-12-02
User Guides
Title Type Size Date Note
NetMeter-OMNI NEMA1 10"x10" QuickGuide 2.7MB 2014-09-24
Online Help for the NetMeter-OMNI - -
NetMeter-OMNI API Specification 1.0.0 1023.9KB 2014-03-22 TLA
NetMeter-OMNI Data Push API Guide 1.0.3 1.1MB 2014-12-16 TLA
Title Type Size Date Note
NetMeter-OMNI Firmware Update: Notes and Instructions - -
NetMeter-OMNI Firmware Update (V1 Build:0459) 638.5KB 2016-04-06 TLA
NetMeter-OMNI Firmware Update (V1 Build:0405) 638KB 2014-08-29 TLA
Z3 Device Discoverer 1.00 207.3KB 2012-08-14 TLA
Z3 Device Discoverer Installation Instructions - -
Online Tools
Title Type Size Date Note
Online Datalog Viewer (view a previously saved JSON file) - -




NetMeter-OMNI applications include:

  • Monitor almost anything:
    • Can be used with most sensors that output a voltage, current, or pulse
  • Energy auditing
    • Quickly measure the effectiveness of energy reduction strategies
  • ISO 50001
    • Monitor and measure processes as required by ISO 50001
  • Air:
    • Monitor leakage
    • Spot opportunities for improvements: partial shutdown during low demand periods, rightsizing of compressors, etc.
    • Optimize maintenance cycles to prevent costly shutdowns, better predict machine failure
  • Water:
    • Detect leakage
    • Accurately determine water input costs
  • Steam: A Z3 Controls NetMeter-OMNI can simultaneously measure and log all the important parameters coming from the mechanical meter:
    • Pressure
    • Temperature
    • Cumulative Flow
    • Flow rate





For complete specifications, see the Installation Manual in the Documents section

Parameter Value
Hardware Form Factor DIN mount
Dimensions 4.183" x 3.55" x 2.26"
Inputs (Voltage Mode)
(I0, I1, I2, I3, I4, I5, I6, I7)
Input Measurement Voltage Range 0-24V
Voltage Accuracy ±1% of full scale
Voltage Resolution 1mV (0.000V – 24.000V)
Inputs (Current Mode)
(I0, I1, I2, I3, I4, I5, I6, I7)
Input Measurement Current Range 0-20mA
Current Accuracy ±1% of full scale
Current Resolution 1µA (0.000mA – 20.000mA)
Pulse Accumulation Channels Pulse counting available on each channel. Can be used with the input mode set to either voltage or current.
Counter Range 48 Bit
Power Supply Minimum Voltage 18VDC
Maximum Voltage 28VDC
Power Consumption 2VA typical (no ZCAN accessories attached)
Network Communication Ethernet

RJ45 connector, compatible with 10Mb/100Mb/1Gb switches and routers.

Web Server Protocols   HTTP/HTTPS server, DHCP client, NetBIOS, ICMP server
SCADA/BAS Integration   Modbus TCP, built-in electronic Modbus map for easy setup
User Interface   Standard Web browser interface with pages for real-time data, historical data, network and sensor setup
Non-volatile Data Storage Log capacity Between about 400,000 and 2,000,000 entries for the 8 channels using lossless data compression
Log capture rate Programmable: 5s, 10s, 15s, 30s, 1m, 5m, 10m, 15m
Firmware Operating system Can be field upgraded
TCP Protocols HTTP/HTTPS server/client, DHCP client, NetBIOS, ICMP server, SSL, SMTP client, Modbus TCP
User Interface Standard Web browser interface with pages for realtime data, historical data, interactive plotting, network and sensor setup. Web content can be field upgraded.
Developer API

Standard HTTP query (POST and GET) returning JSON or CSV formatted data

Queries for: gateway configuration, sensor configuration, and sensor data (real-time and historical)

Security   User (local and/or remote) and Administrator passwords, SSL capable
Operating Conditions   -20°C to 60°C, 85% relative humidity

Browser Compatibility

Compatible with all major modern web browsers including:

  • Firefox
  • Internet Explorer (Version 9 or above)
  • Google Chrome
  • Opera
  • Safari

Follow this link to test your browser for compatibility: Browser Compatibility Check



Further Reading

The Online Help provides further details and documentation.