Temperature Measurement Products

Impac IGA 320/23-LO

Short Wavelength Digital Pyrometer with Fiber Optics for Non-Contact Temperature Measurement, 85 to 1200°C

Advanced Energy's IGA 320/23-LO is a short wavelength infrared measuring instrument with fiber optics and internal digital signal processing capabilities. This pyrometer is used for measurements of metallic surfaces, graphite, and ceramics, etc.

  • Fiber optics
  • Internal digital processing capabilities
  • High-quality optics
  • LED target light
  • Overview
  • Technical Specs
  • Documents
  • Accessories
  • Service & Support
  • Distributors


The Impac® IGA 320/23-LO is a compact, short-wavelength pyrometer that easily integrates into production machines and offers two different optics.

It is equipped with a fiber and an exchangeable optical head. The fiber and optical head are unaffected by electromagnetic interferences (e.g., induction) and can be used in high ambient temperatures up to 200°C without additional cooling.

The included InfraWin software enables the graphical display and measurement-value storage. You can also easily set up pyrometer parameters.


  • Use fiber and optical head in high ambient temperatures up to 200°C without additional cooling
  • Easily integrate into compact production machines
  • Enable precise alignment via the LED target light
  • Store measurement values
  • Easily set up all instrument parameters


  • RS485 interface for long transmission networks for connection to a PC via USB converter or machine control (PLC)
  • Analog output adjustable to 0 or 4 to 20 mA for connection to standard analyzing instruments
  • Two different optics are available
  • InfraWin software include

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

  • Temperature Ranges

    IGA 320/23-LO

    85 to 600°C (185 to 1112°F)
    100 to 700°C (212 to 1292°F)
    150 to 1200°C (302 to 2192°F)
    Any range adjustable within the temperature range, min span 51°C

  • Measurement

    Spectral Range

    2 to 2.6 μm (main wavelength 2.3 μm)

    Measurement Uncertainty


    0.1% of measured value in °C + 1°C
    ε = 1, t90 = 1 s, Tamb. = 23°C
    The temperature of fiber and optical head must be at least 30°C lower than the measuring temperature to get a correct temperature reading.

    Exposure Time t90

    2 ms (with dynamic adaptation at low signal levels);
    adjustable to 0.01 s, 0.05 s, 0.25 s, 1 s, 3 s, 10 s

    Emissivity ε

    10.0 to 100.0%, adjustable via interface in steps of 0.1%

    Transmittance τ

    10.0 to 100.0%, adjustable via interface in steps of 0.1%

  • Optical


    Built-in LED targeting light


    Optics I: Three fixed distances
    Optics II: Four fixed distances
    Optics II: Six focusable optics

    Distance Ratio (FOV)

    Optics I: 90:1 (1.3 mm)
    Optics II: 180:1 (0.5 mm)

  • Interface and Communication


    8-pin connector


    Adjustable via interface: emissivity ε, transmittance t, exposure time t90, max/min value storage, analog output, sub temperature range, ambient temperature compensation, pyrometer address, switch contact, hysteresis, baud rate, wait time tW, targeting light

    Analog Output

    0 to 20 or 4 to 20 mA (linear), switchable

    Digital Interface

    RS485 addressable (half duplex); baud rate 1200 up to 38,400 Bd or RS232; baud rate 1200 up to 115,200 Bd

  • Environmental

    Protection Class

    IP 54 (IEC 60529)

    Operating Position


    Ambient Temperature

    0 to 70°C (32 to 158°F) at housing
    Up to 200°C (392°F) on side of fiber and optical head

    Storage Temperature

    -20 to 70°C (-4 to 158°F)

    Relative Humidity

    Non-condensing conditions


    0.53 kg (~1.17 lb) including optical fiber and lens assembly


    Stainless steel

    CE Label

    According to EN 61326-1:2006-10

  • Electrical

    Power Supply

    24 VDC (10 to 30 VDC), ripple must be less than 0.5 V

    Power Consumption

    Max 1 W

    Load (analog output)

    0 to 500 Ω


    2 to 20°C


    Power supply, analog output, and digital interface are galvanically isolated against each other

  • Typical Applications

    • Preheating
    • Annealing
    • Tempering
    • Welding
    • Forging
    • Hardening
    • Sintering
    • Melting
    • Soldering
    • Brazing
    • Rolling

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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Global Support & Services

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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

Thin Film Support
Thermal Product Support
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