Temperature Measurement Products

E²T Pulsar 4

Infrared Thermometry for Sulfur Reactors and High Temperature Furnaces

Advanced Energy's E2T Pulsar 4 instruments provide infrared thermometry for sulfur reactors and other high-temperature furnaces in temperatures between 350 to 2000°C.

  • Single-channel standard model programmable for gas or refractory measurement
  • Two-channel advanced model with simultaneous measurement of refractory and gas temperatures
  • Explosion-Proof Certification II 2G Ex db IIB +H2 T4, IECEx, ATEX, FM (US and CDN) plus additional regional certifications
  • Smart FMA™ Flame Measurement Algorithm (Pulsar 4 Advanced Only)
  • RS485 Interface, HART protocol (Pulsar 4 Advanced Only)
  • Overview
  • Technical Specs
  • Documents
  • Service & Support
  • Distributors


The E2T PulsarTM 4 is a single channel model for gas or refractory measurement and the E2T Pulsar 4 Advanced is designed to measure two wavelengths for continuous and instantaneous measurement of Refractory temperature  and gas temperature simultaneously.

The innovative Advanced Energy Smart FMA Flame Measurement Algorithm allows for accurate real-time flame transparency compensation and correction. Applying the flame transparency calculation with FMA removes the flame transparency errors due to the gas (flame) temperature.


  • Prevent damage to the furnace refractory with high temperature alarms
  • Install a single system with two independent infrared filtered detectors for gas (flame) and refractory measurements
  • Quickly react to control the furnace process temperatures with instant readings
  • Gain higher operational safety with accurate refractory measurement and high temperature alarms
  • Use Smart FMA to remove flame transparency errors that typical pyrometers experience (Advanced version only)


  • Explosion-proof certification II 2G EX d IIB +H2 T4, IECEx, ATEX, FM (US and CDN) plus additional regional certifications
  • Integrated power supply, capable of operating with 24VDC/120/230VAC
  • Flexible power options (24 VDC/120/230 VAC)
  • RS485 interface and HART protocol (Advanced version only)

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

  • Temperature Range

    Pulsar 4 / Pulsar 4 Advanced

    350 to 2000°C (662 to 3632°F)

  • Measurement

    Emissivity Adjustment

    0.100 to 1.000 digital on both channels when in standard mode

    Transmittance Adjustment

    0.100 to 1.000 digital on both channels when in standard mode

    Alpha Adjustment

    Pulsar 4 Advanced: 0.050 to 1.000 aLP when in FMA mode on GT channel (when in FMA mode)

    Measurement Uncertainty

    ±0.3% of reading or 3°C + 1 digit, whatever is greater
    ε = 1, t90 = 1 s, Tamb. = 25°C


    0.1% of full scale span
    ε = 1, t90 = 1 s, Tamb. = 25°C

    Response Time t90

    Pulsar 4: Programmable from 0.05 to 120 seconds
    Pulsar 4 Advanced: Programmable from 0.05 to 120 seconds When FMA mode is on: 0.5 to 120 seconds

    Focusing Range

    500 mm to infinity

    Distance Ratio (Target Size)

    160:1 standard resolution, (distance/target size)

  • Communication

    Analog Output

    Digital Interface

    RS485 addressable (half-duplex)
    Baud rate: 1.2 to 115.2 kBd
    HART Rev. 7 interface (Pulsar 4 Advanced only)

    Relay Alarm

    30 VDC / 1A max; Resistive
    Configuration of alarm: no alarm; alarm, if temperature > setpoint; alarm, if temperature < setpoint

  • Environmental Specifications

    Protection Class

    CE 2809, EX II 2G, Ex db IIB +H2 T4 Gb
    FM14ATEX0004X IECEx FME 14.0001X
    Class I, Div. 1, Groups B, C & D, T4
    Ta = -40 to 60°C IP66
    NEMA “Type 4X” classification

    Ambient Temperature

    -40 to 60°C (-40 to 140°F)

    Torque Spec, Lid Bolts

    5.5 nm


    View port purge: 1.4 bar min, 1.7 m3/h (at standard conditions)
    Combustion purge: 1.4 bar min, 17 m3/h (at standard conditions)

  • Electrical

    Power Supply

    24 V (18 to 30 VDC), 0.2 A maximum; 3.5 A with heater
    115 VAC ±10%, 47 to 63 Hz; 230 VAC ±10%, 47 to 63 Hz

    Power Consumption

    Maximum 90 W (with heater)


    Pulsar 4: 0 to 600 Ω (mA output)
    Pulsar 4 Advanced: 0 to 600 Ω (mA output); 230 to 600 Ω (mA output with HART)

  • Typical Applications

    • Sulfur recovery unit (SRU) monitoring
    • Thermal oxidizer monitoring
    • Petrochemical emissions monitoring

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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