Temperature Measurement Products

Impac IS 50-LO/GL

Digital Infrared Thermometer with Fiber Optics, 600 to 1800°C

Advanced Energy's Impac IS 50-LO/GL is a specially designed pyrometer for temperature measurement in glass applications.

  • Adjustable temperature ranges between 600 and 1800°C
  • Robust fiber optic cable (up to 30 m) with a quick-release optical head
  • Ambiance up to 250°C without cooling
  • Overview
  • Technical Specs
  • Documents
  • Accessories
  • Service & Support
  • Distributors


The Impac® IS 50-LO/GL digital pyrometer is primarily used for temperature measurement of glass in tanks, working-end forehearths, and feeder applications. It also can be used for brickwork temperature measurement in regenerators and tanks.

The IS 50-LO/GL uses the two-wire technique. It combines the high accuracy of digital signal processing with the simple connection and operation of two wires.

The instrument includes a robust fiber optic cable (length up to 30 m). This enables the use in ambient temperatures up to 250°C without cooling.


  • Achieve high accuracy due to output digital linearization
  • Select from different sighting tubes (ceramic or Inconel) to optimally adapt to applications
  • Operate the instrument in ambient temperatures up to 250°C without cooling
  • Easily install by separating the optical head and converter from the fiber optic


  • Adjustable emissivity directly on the device
  • Adjustable response time and subrange via interface
  • Optional integrated air purge with Inconel or ceramic sighting tubes
  • Standard fiber optic cable of 5 m with optional lengths available: 10, 15, and 30 m

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

  • Temperature Range

    IS 50-LO/GL

    600 to 1800°C
    Any range adjustable within the measuring range, minimum range 51°C

  • Measurement

    Spectral Range

    0.8 to 1.1 µm

    Measurement Uncertainty

    <1500°C: ±0.3% of measured value in °C +1°C
    >1500°C: ±0.5% of measured value in °C +1°C


    0.1% of measured value in °C +1°C

    Exposure Time t90

    250 ms, adjustable up to 10 s; ex works adjusted to 1 s

    Emissivity ε

    0.05 to 1.00; adjustable

  • Optical


    One fixed optic

    Distance Ratio (FOV)

    110:1 (min. 9 mm)

  • Interface and Communication

    Analog Output

    4 to 20 mA, temperature linear

    Digital Interface

    Service interface RS232


    Emissivity, test signal 12 mA

    Additional Parameters via Interface: Measuring range, response time

  • Environmental

    Protection Class

    IP65 with mounted cable

    Ambient Temperature

    0 to 70°C at the housing
    0 to 250°C at the optical head

    Storage Temperature

    -20 to 70°C

    Relative Humidity

    Non-condensing conditions


    0.6 kg


    Alu die-casting;
    Stainless steel (optical head)

    L x W x H

    125 x 80  x 57 mm ( without plug)
    112 x 22 mm (optical head)

    CE Label

    According to EU directives about electromagnetical immunity

  • Electrical

    Power Supply:

    24 V DC ± 25%, ripple max. 50 mV

    Power Consumption:

    0.6 W


    700 Ohm at 24 V power supply

  • Typical Applications

    Glass temperature measurement in:

    • Forehearths
    • Feeders
    • Tanks

    Brickwork temperature measurement:

    • Tank side walls
    • tank roofs
    • Regenerators

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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