Temperature Measurement Products

E²T Quasar 2

Continuous Duty Flare Monitoring and Detection Instruments

Advanced Energy's E2T Quasar 2 instruments provide continuous monitoring and detection of pilot flame and flared gases from flares.

  • Flame detection up to 400 m
  • Detection of hydrocarbon and hydrogen flames
  • Pilot and flaring signal level mA output
  • Modular optoelectronic package for easy access and service
  • Overview
  • Technical Specs
  • Documents
  • Service & Support
  • Distributors


The  E2T Quasar 2 is available in two models, the Quasar 2 M8100-EXP and Quasar 2 M8100-EXP Advanced. The base system provides basic flare pilot monitoring capabilities and the advanced system includes an intensity mA output. The advanced unit's setpoint feature can also be used for staged flares.

Target alignment is accomplished via the targeting port and signal intensity LED bar displays amplitude in combination with a stable heavy-duty, swivel M-4 mount. Custom electronics adapt to target movement, varying luminosity, and most climate conditions.


  • Install a reliable and accurate flare pilot monitoring system without service interruption
  • Use the high-resolution optical system and various spot sizes to position the system up to 1/4 mile (400 m) away from the monitored flare stack
  • Adjust the alarm delay circuit to eliminate false alarms from temporary loss of signal due to intermittent flames, adverse weather, and wind
  • Monitor pilot flame detection and flaring status signals with the intensity mA output (Advanced version only)


  • Configurable product to meet a wide range of client flare types and monitoring requirements
  • Five optics options with targeting port for alignment (available in 37.5:1, 60:1, 75:1, 150:1, and 300:1)
  • Status lights: green (flame) and red (no flame)
  • Housing is stainless steel (316 L), 114 mm tube diameter, IP 66
  • Additional features are available to meet a wide range of  flare types, monitoring requirements, and budgets

Select specifications are shown below. Please see product data sheet for additional specifications.

  • Measurement Specifications

    Working Distance

    400 m (1320')

    Flame Type

    Infrared monitor sensitive to all flame including hydrogen

    Field of View

    Available in 37.5:1, 60:1, 75:1, 150:1, and 300:1
    Targeting port for target alignment

    Response Time

    10 ms

    Sensitivity Adjustment

    Automatic climate compensation and manual gain for easy system setup

    Safety Integrity Level (SIL)

    Level 1

    Status Lights

    Green (Flame) and red (No Flame)

  • Communication

    Output Signal

    Quasar 2: 4 or 20 mA switched output (4 mA = flame and 20 mA = no flame)
    Quasar 2 Advanced: Additional 4 to 20 mA

    Alarm Setpoint

    Mechanical relay (Quasar 2 Advanced only)

    Alarm Output Delay

    2 s to 2 min (Std)

    Intensity Indicator

    20 LEDs bar

  • Environmental

    Protection Class

    NEMA 4X IP 66

    Hazardous Classification

    IECEx Ex db IIB T4
    ATEX II 2 G Ex db IIB T4
    Canada and US certified explosion-proof housing

    Ambient Temperature

    -40 to 60°C with no cooling


    12 x 33 x 12 cm (4.7 x 12.8 x 4.7 in)


    12 kg (26.5 lb)


    M-4 heavy duty 360° swivel mount


    Stainless steel (316 L), tube dia. 114 mm, IP 66

  • Electrical

    Power Requirements

    5 Watts, 24 VDC and 115 VAC / 230 VAC

  • Typical Applications

    • Elevated flares - e.g. steam assisted, air assisted, and gas assisted
    • Ground flares - e.g. burn pit flares and ground flare arrays
    • Off-shore flares
    • Staged flares

Specifications are subject to change without notice. Not all options and accessories are available for all models and configurations. Dimensions listed generally refer to standard configurations and module bodies only. Please confirm technical specifications and customizations with a sales representative. Advanced Energy is not responsible for errors or omissions.

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Product Support

U.S.: +1 800 446 9167
Asia: +86 29 8874 1895
China: 400 8899 130
EMEA: +44 800 032 1546
U.K.: 08000 321 546

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