Temperature Measurement Products

Impac IS 50-LO plus and IGA 50-LO plus Series

Digital, Highly Accurate Infrared Thermometers, 50 and 3500°C

Advanced Energy's Impac 50-LO plus and IGA 50-LO plus series include pyrometers with fiber optics for non-contact temperature measurement on metals, ceramics, graphite, etc.

  • Temperature Ranges: Between 250 and 3500°C
  • Extremely short exposure time
  • Very small spot sizes
  • Built-in LCD display
  • Test current output for diagnostics
  • Overview
  • Technical Specs
  • Documents
  • Accessories
  • Service & Support
  • Distributors


The Impac® 50-LO plus and IGA 50-LO plus series include highly accurate, infrared measuring instruments with fiber optics for non-contact measurement on metals, ceramics, graphite, etc. in temperature ranges between 250 and 3500°C.

The Impac IS 50/055-LO plus and IS 50/067-LO plus are special versions with extremely short wavelengths.

The IS 50-Al-LO plus is specially designed for measurements on aluminum parts and profiles.



  • Digitally display and store temperature readings
  • Facilitate the measurement of the fastest heating processes
  • Take advantage of very short response time
  • Utilize two different types of optical heads for different measuring distances
  • Enable the exact alignment onto the measuring object


  • Switchable digital interface RS232/RS485
  • Adjustable settings via the integrated keypad or the interface
  • Optical fiber for high ambient temperatures up to 250°C, unaffected by electromagnetic interferences
  • Laser-targeting light
  • Test current output

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

  • Temperature Ranges

    IS 50-LO plus

    550 to 1400°C (1022 to 2552°F)
    600 to 1600°C (1112 to 2912°F)
    650 to 1800°C (1202 to 3272°F)
    750 to 2500°C (1382 to 4532°F)
    900 to 3300°C (1652 to 5972°F)
    550 to 1800°C (1022 to 3272°F)
    600 to 2000°C (1112 to 3632°F)

    IS 50/055-LO plus

    1000 to 2300°C (1832 to 4172°F)

    IS 50/067-LO plus

    1100 to 3500°C (2012 to 6332°F)

    IS 50-Al-LO plus

    400 to 1000°C (752 to 1832°F)

    IS 50-Si-LO plus

    400 to 1300°C (752 to 2372°F)
    500 to 1600°C (932 to 2912°F)

    IGA 50-LO plus

    300 to 1300°C (572 to 2372°F)
    350 to 1800°C (662 to 3272°F)
    450 to 2500 °C (842 to 4532°F)
    250 to 1350 °C (482 to 2462°F)
    300 to 2000 °C (572 to 3632°F)
    350 to 2500 °C (662 to 4532°F)

  • Measurement

    Spectral Ranges

    IS 50-LO plus: 0.7 to 1.1 μm
    IS 50/055-LO plus: 0.55 μm
    IS 50/067-LO plus: 0.676 μm
    IS 50-Al-LO plus and IS 50-Si-LO plus: Narrow band in the near infrared
    IGA 50-LO plus: 1.45 to 1.8 μm

    Measurement Uncertainty

    Below 1500°C: 0.3% of measured value in °C + 1°C
    Above 1500°C: 0.5% of measured value in °C
    ε = 1, t90 = 1 s, Tamb. = 23°C


    0.1% of reading in °C + 1°C
    ε = 1, t90 = 1 s, Tamb. = 23°C

    Exposure Time t90

    < 1 ms; adjustable to 0.01 s, 0.05 s, 0.25 s, 1 s, 3 s, 10 s

    Emissivity ε:

    20 to 100% adjustable inside the instrument or via interface in steps of 0.1%

  • Optical


    Laser targeting (maximum power level < 1 mW, λ = 630 to 680 nm, CDRH class II)


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

    Distance Ratio (FOV)

    Optics I: 100:1 (1.2 mm)
    Optics II: min. 200:1 (0.45 mm)

  • Interface and Communication


    Illuminated LC display for temperature indication or parameter settings


    Adjustable at the instrument or via serial interface, emissivity ε, exposure time t90, analog output, address, baud rate, waiting time, °C / °F, setting of the maximum value storage, temperature subrange

    Analog Output

    Linear 0 to 20 mA or 4 to 20 mA, DC, switchable; load max. 500 Ohm

    Digital Interface

    Switchable: RS232 or RS485 (addressable), half-duplex
    Baud Rate 1.2 up to 115 kBd

  • Environmental

    Protection Class


    Ambient Temperature

    IS 50-LO plus and IGA 50-LO plus: 0 to 60°C (32 to 140°F) on the converter, up to 250°C (482°F) on side of fiber/optical head

    IS 50-Si-LO plus and IS 50-AI-LO plus: 20 to 30°C (68 to 86°F) on the converter, up to 250°C (482°F) on side of fiber/ optical head

    Storage Temperature

    -20 to 70°C (-4 to 158°F)

    Relative Humidity

    Non-condensing conditions


    Converter: 600 g (~1.32 lb)
    Optical Head II: 140 g (~4.94 oz)
    Fiber (2.5 m): 250 g (~8.82 oz)

    CE Label

    According to EU directives about electromagnetic immunity

  • Electrical

    Power Supply

    24 VAC or DC (12 to 30 VAC or DC) (AC: 48 to 62 Hz)

    Power Consumption

    Max 2 W


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

  • Typical Applications

    • Metal molds
    • Pressing tools
    • Bearings, bearing housings
    • Preheating
    • Annealing
    • Tempering
    • Sintering
    • Soldering
    • Rolling
    • Brazing
    • Normalizing

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
Other Technical Support


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