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CNG & RNG Optima Series fuelling dispenser

CNG & RNG Optima™ Series

The most advanced CNG & RNG fuelling dispenser on the market.

Optima™ is the result of three decades of CNG focused experience and feedback from the field. A newly designed MICON NEXTGEN 1.0® aids station operators with additional communication capabilities, including remote access to gather data, download error code reporting, and complete software updates. Optima™ offers a new level of fuel dispensing performance while maintaining the reputation for high standards Kraus is known for.

With an array of standard customizable options, Optima™ can easily adapt to your standard or unique station design requirements. Because each dispenser is made to order this level of customization is possible at a cost comparable to an out of the box dispenser.

Station Operators will appreciate more control over operating parameters through superior data acquisition capabilities, analysis tools, and the expanded set of configurable variables. Enhanced diagnostics identify dispenser performance enabling faster trouble shooting and root cause analysis on site or remotely minimizing down time.

Grow your fleet base by providing Fleet Managers historical and real time filling data they will come to rely on. Save valuable Technical Support time while servicing the dispenser using enhanced diagnostics and the purpose built cabinet providing easier accessibility to internal components.

Uptime and Reliability

  • Save time and money with remote software upgrades, advanced monitoring , and troubleshooting tools
  • Easier serviceability with purpose built CNG cabinet

Fill Data & Reporting Capabilities for Each Hose

  • Real time data via PULSE™ display provides dispenser and station data to the user
  • Store data for larger analysis of overall station performance

Accuracy and Completeness of Fill

  • Kraus has engineered a new, more powerful MICON™ controller
  • Faster data acquisition and sensing of key process variables
  • Direct connection between MICON NEXTGEN 1.0® and the mass flow meter
  • Enhanced filling algorithm leverages the computing power of the MICON NEXTGEN 1.0® to reduce look backs (filling pauses)
  • Expanded filling variables allow more control to dial-in the dispenser for site conditions and vehicle types
  • Superior data acquisition capabilities and analysis tools allow for more intelligent fact base filling variable adjustments in order to optimize fills

Standard Features

  • Single and Dual Sided Units
  • Service Pressure: 3,600 psi (250 BAR) Working Pressure: up to 5,000 psi (345 BAR)
  • Temperature Compensated to 70°F
  • Flow rates: Up to 5,000 SCFM with high-flow configuration. Actuals vary based on site conditions, gas density, atmospheric pressure, temperature, and type of vehicle. Up to eight inlets per dispenser depending on tubing size and valve configuration
  • Internal Piping Stainless Steel, available in sizes from 3/8″ up to 1″depending on flow characteristics desired and to best match station configuration
  • Meter technology: Coriolis Mass Flow, 1 per hose, up to two per dispenser Primary Displays: Large backlit LCD Main display for Total Sale, GGE Volume and Price per Unit.
  • Panels and doors painted black (standard)
  • In-Cabinet or Remote Coalescing Filters

Purge System

  • NFPA 496 Compliant Type X purge system designed to fully declassify the upper cabinet enclosure
  • See Controls and Register section
  • Handle lever to start/stop fill located on holster

Computing and Controls

  • MICON NEXTGEN 1.0® Controller and Register
  • 100 MB Fiber Optic Isolated Ethernet connection allows for safe high-speed connection to the dispenser
  • Communication Interfaces: Standard 2-wire POS/Credit Card Protocols Remote configuration of dispenser(s) from a computer, tablet, or phone
  • Direct connection to mass flow meter. Error codes, gas temperature, and other meter data can be accessed via MODBUS
  • Multiple POS/FMS/PLC communications interfaces
  • MicroSD card data logging 24/7 of every transaction.

Operating Environment

  • -40°C to +50°C
  • Humidity = 10-95% Rh
  • 120 VAC heater available for temps <-20°C


  • +/- 10% 120 VAC standard
  • 240 VAC available, 60 Hz

Mechanical Controls and Valves

  • Manual external shut-off valves, 1 per side
  • Internal solenoid valves or high-flow actuated ball valves
  • One Internal Liquid filled pressure gauge per hose
  • Check valve between sequencing valves
  • Internal Piping Connections, available in sizes from 1/4″ up to 1″ depending on flow characteristics desired and to best match station configuration
  • Pressure relief valve, opens at 4,500 psi (310 BAR) 1″ Vent line.

Available Options

  • Full color 10.4″ TFT high-resolution display
  • Encrypted PIN Pad for retail debit and EMV credit card application (pending completion)
  • Secure Card reader
  • High Speed USB Printer for retail application Customized, Brand-centric graphic panels
  • Multimedia capable – video and audio with customer interaction capability via display softkeys.
  • Large over-canopy for customer branding purposes is available
  • Type 1 and Type 2 hanging hardware components

Regulatory – Dispenser

  • (Compliant. Pending Completion.)
  • NCWM Certificate of Conformance
  • MC (Measurement Canada)
  • PCI and EMV Credit/Debit Card Compliant
  • ETL Intertek Certification
  • NFPA 52 Compressed NGV Fuel Systems
  • NFPA 70, ASME B31.3
  • NTEP and Measurement Canada certified register (pending completion)

Regulatory – Register/Controller

  • ETL Certified Intrinsically Safe Inputs and Outputs for Class I, Division I environments
  • NCWM Certification of Conformance
  • MC (Measurement Canada) (pending completion)


  • Height: 93″
  • Width: 46″ at base, 47.5″ at canopy
  • Depth: 23.75″ at base, 29″ at canopy