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volume converters

EC250 Gas Volume Corrector

A flexible, direct-mount PTZ gas volume corrector for rotary meter installations—built to improve billing confidence, simplify field work, and keep operations connected.

Overview
The EC250 Electronic Volume Corrector (EVC) is built for gas distribution companies and commercial and industrial operators who need confidence in every cubic foot measured. Designed for direct mounting on rotary gas meters, the EC250 delivers accurate, repeatable volume correction using pressure and temperature inputs, helping improve fair billing, reliable custody transfer, and clear operational visibility.
By combining a compact footprint, universal compatibility with leading rotary meters, and secure connectivity options, the EC250 helps operators protect revenue and reduce lost or unaccounted for gas. At the same time, it simplifies installation, commissioning, and ongoing maintenance—so teams can spend less time in the field and more time focused on safer and efficient network operation.
Key Benefits
  • Accurate, Reliable Volume Correction
Corrects measured gas volume using pressure and temperature inputs, with redundant volume sensing to reduce the risk of lost and unaccounted for gas and support reliable billing and custody transfer.
  • Universal Direct Mounting
Designed for direct installation on rotary gas meters, enabling fast deployment across mixed installed bases with minimal installation effort.
  • Built-In Meter Health Monitoring
Integrated differential pressure measurement and logging provide continuous insight into meter performance, eliminating the need for frequent site visits and manual DP testing.
  • 24/7 Connectivity
AMR ready and compatible with leading systems such as Itron, Aclara, and Sensus, with optional Honeywell CloudLink 5G cellular connectivity for secure, automated data transmission.
  • Cybersecurity by Design
Developed to meet modern security requirements, including ANSI/ISA 62443 and IEC 62443 compliance, ISASecure® SDLA certification, and TLS encryption to protect critical measurement data.
Who It’s For
  • Commercial and industrial metering stations
  • Gas distribution networks
  • Custody transfer and billing applications
  • Sites requiring compact, direct-mounted volume correction
  • Operators seeking remote visibility and reduced site visits
Common Use Cases
  • Gas Distribution Billing & Custody Transfer
Used at distribution metering points where accurate volume correction is required for billing and custody transfer.
  • Commercial & Industrial Metering Stations
Ideal for C&I sites that require reliable gas volume measurement for operational monitoring and billing accuracy, with compact direct mounting to rotary meters and minimal installation complexity.
  • Rotary Meter Health Monitoring
Applied in installations where continuous insight into rotary meter performance is critical.
  • Remote Monitoring & Automated Data Collection
Deployed at sites requiring automated volume data transmission to meter data management or monitoring systems.
  • Standardization Across Mixed Rotary Meter Fleets
Used by operators managing rotary meters from multiple manufacturers who need a standardized, universal direct-mount solution across their installed base.

Certifications and Compliance
  • CSA and IECEx hazardous location approvals (pending)
  • Class I, Div. 1 / Zone 0 and Class I, Div. 2 / Zone 2 ratings (pending)
  • Designed to support regulatory and custody transfer requirements
  • (Metrological approvals pending)
Why Choose Honeywell
Honeywell brings decades of experience in gas measurement and control, delivering solutions trusted by utilities and operators worldwide. The EC250 reflects Honeywell’s commitment to accuracy, cybersecurity, and future ready‑connectivity—helping customers protect revenue, improve operational efficiency, and maintain compliance in an evolving energy landscape.
Specifications

I/O Capabilities

  • Inputs
    • Redundant high frequency Wiegand sensor input
  • Compatible Meter Types
    • Dresser LMMA and B3
    • Elster RABO
    • Romet RM and RMT
  • Mounting Options
    • Integrated Rotary mount for leading brand rotary gas meters
  • Outputs
    • 4 Digital outputs (volume pulse + alarm), AMR-Ready and compatible with Itron, Aclara & Sensus AMR Devices

Environmental Conditions

  • Ambient Temperature Effects
    • -40 to 149 deg F (-40 to 65 deg C)
  • Temperature Sensors
    • RTD Temperature Sensor
  • Long Term Stability
    • Long-term drift - Pressure
    • Pressure Range = 15 PSI +/- 0.67% of full scale over 10 years
    • Pressure Range > 30PSI +/- 0.4% of full scale over 10 years
  • Compressibility
    • Corrected volume calculation according to AGA-8 Gross (Methods 1&2) & AGA8 Detail, and NX-19
  • Battery Life
    • Alkaline receptacle: up to 5 years
    • Lithium batteries: up to 15 years
  • Battery
    • Alkaline, Lithium

Communication & Protocols

  • Communication Protocols
    • Mercury Instruments
  • Communication
    • Optional class I Div. 1 cellular radio modem CloudLink 5G

Standards & Certifications

  • Metrological Approvals
    • Measurement Canada (pending)
  • Explosion Protection
    • Ambient Temperature: -40 to +65 deg C
    • CSA IECx (in progress)
    • Class I, Zone 0 AEx ia IIB T4 Ga
    • Class I, Zone 2 AEx ic IIB Gc
    • Intrinsically Safe, Class I, Division 1 Groups B, C, D T4

Software & Interface

  • Configuration Software
    • MasterLink
  • Display
    • Multi-line Display with Single push button operation

Processing & Performance Metrics

  • Temperature Accuracy
    • Maximum error at reference conditions: ±0.1% of reading
  • Pressure Accuracy
    • Maximum error at reference conditions: ±0.04% of full scale
  • Accuracy
    • Maximum error over the full temperature range -40 to 149 deg F (-40to 65 deg C) Including linearity, repeatability, and hysteresis - Pressure: 0.1% of full scale - Temperature: ±0.1% of reading

Functional & Control Features

  • Integrated Sensors
    • Optional differential pressure transmitter for rotary meter health insight
  • Remote Upgrade
    • via Firmware-over-the-air (FOTA)
  • Audit Trail
    • Single, configurable and flexible audit trail with up to 10 items with configurable interval: 1,5,10,15,30 minutes, hourly, daily, monthly, Year plus capacity hourly logging

Electrical Specifications

  • Power Supply
    • Battery powered
    • No external power supply

Applications & Compatibility

  • Applications
    • Commercial and Industrial Gas Distribution
    • Custody transfer Measurements
    • Supports AMR (Automatic Meter Reading) connections

I/O Capabilities

  • Inputs
    • Redundant high frequency Wiegand sensor input
  • Compatible Meter Types
    • Dresser LMMA and B3
    • Elster RABO
    • Romet RM and RMT
  • Mounting Options
    • Integrated Rotary mount for leading brand rotary gas meters
  • Outputs
    • 4 Digital outputs (volume pulse + alarm), AMR-Ready and compatible with Itron, Aclara & Sensus AMR Devices

Environmental Conditions

  • Ambient Temperature Effects
    • -40 to 149 deg F (-40 to 65 deg C)
  • Temperature Sensors
    • RTD Temperature Sensor
  • Long Term Stability
    • Long-term drift - Pressure
    • Pressure Range = 15 PSI +/- 0.67% of full scale over 10 years
    • Pressure Range > 30PSI +/- 0.4% of full scale over 10 years
  • Compressibility
    • Corrected volume calculation according to AGA-8 Gross (Methods 1&2) & AGA8 Detail, and NX-19
  • Battery Life
    • Alkaline receptacle: up to 5 years
    • Lithium batteries: up to 15 years
  • Battery
    • Alkaline, Lithium

Communication & Protocols

  • Communication Protocols
    • Mercury Instruments
  • Communication
    • Optional class I Div. 1 cellular radio modem CloudLink 5G

Standards & Certifications

  • Metrological Approvals
    • Measurement Canada (pending)
  • Explosion Protection
    • Ambient Temperature: -40 to +65 deg C
    • CSA IECx (in progress)
    • Class I, Zone 0 AEx ia IIB T4 Ga
    • Class I, Zone 2 AEx ic IIB Gc
    • Intrinsically Safe, Class I, Division 1 Groups B, C, D T4

Software & Interface

  • Configuration Software
    • MasterLink
  • Display
    • Multi-line Display with Single push button operation

Processing & Performance Metrics

  • Temperature Accuracy
    • Maximum error at reference conditions: ±0.1% of reading
  • Pressure Accuracy
    • Maximum error at reference conditions: ±0.04% of full scale
  • Accuracy
    • Maximum error over the full temperature range -40 to 149 deg F (-40to 65 deg C) Including linearity, repeatability, and hysteresis - Pressure: 0.1% of full scale - Temperature: ±0.1% of reading

Functional & Control Features

  • Integrated Sensors
    • Optional differential pressure transmitter for rotary meter health insight
  • Remote Upgrade
    • via Firmware-over-the-air (FOTA)
  • Audit Trail
    • Single, configurable and flexible audit trail with up to 10 items with configurable interval: 1,5,10,15,30 minutes, hourly, daily, monthly, Year plus capacity hourly logging

Electrical Specifications

  • Power Supply
    • Battery powered
    • No external power supply

Applications & Compatibility

  • Applications
    • Commercial and Industrial Gas Distribution
    • Custody transfer Measurements
    • Supports AMR (Automatic Meter Reading) connections
  • Inputs : Redundant high frequency Wiegand sensor input
  • Ambient Temperature Effects : -40 to 149 deg F (-40 to 65 deg C)
  • Communication Protocols : Mercury Instruments
  • Metrological Approvals : Measurement Canada (pending)
  • Configuration Software : MasterLink
  • Compatible Meter Types : Dresser LMMA and B3|Elster RABO|Romet RM and RMT
  • Temperature Accuracy : Maximum error at reference conditions: ±0.1% of reading
  • Explosion Protection : Ambient Temperature: -40 to +65 deg C|CSA IECx (in progress)|Class I, Zone 0 AEx ia IIB T4 Ga|Class I, Zone 2 AEx ic IIB Gc|Intrinsically Safe, Class I, Division 1 Groups B, C, D T4
  • Temperature Sensors : RTD Temperature Sensor
  • Long Term Stability : Long-term drift - Pressure|Pressure Range = 15 PSI +/- 0.67% of full scale over 10 years|Pressure Range > 30PSI +/- 0.4% of full scale over 10 years
  • Integrated Sensors : Optional differential pressure transmitter for rotary meter health insight
  • Pressure Accuracy : Maximum error at reference conditions: ±0.04% of full scale
  • Mounting Options : Integrated Rotary mount for leading brand rotary gas meters
  • Compressibility : Corrected volume calculation according to AGA-8 Gross (Methods 1&2) & AGA8 Detail, and NX-19
  • Remote Upgrade : via Firmware-over-the-air (FOTA)
  • Communication : Optional class I Div. 1 cellular radio modem CloudLink 5G
  • Power Supply : Battery powered|No external power supply
  • Battery Life : Alkaline receptacle: up to 5 years|Lithium batteries: up to 15 years
  • Applications : Commercial and Industrial Gas Distribution|Custody transfer Measurements|Supports AMR (Automatic Meter Reading) connections
  • Audit Trail : Single, configurable and flexible audit trail with up to 10 items with configurable interval: 1,5,10,15,30 minutes, hourly, daily, monthly, Year plus capacity hourly logging
  • Accuracy : Maximum error over the full temperature range -40 to 149 deg F (-40to 65 deg C) Including linearity, repeatability, and hysteresis - Pressure: 0.1% of full scale - Temperature: ±0.1% of reading
  • Outputs : 4 Digital outputs (volume pulse + alarm), AMR-Ready and compatible with Itron, Aclara & Sensus AMR Devices
  • Display : Multi-line Display with Single push button operation
  • Battery : Alkaline, Lithium
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