IMPAC Pyromètre
IGA 740

High-speed pyrometer for non-contact temperature measurement of metallic surfaces, graphite or ceramics between 160°C and 2500 °C.

Pyrometer IMPAC series 740 Front View
Pyrometer IMPAC IGA 740 View 2

Key Features

  • Extremely fast response time of only 6 µs for measurements of fast moving objects or fast temperature changes
  • High quality optics for detection of small measuring objects
  • Built-in LED targeting light for easy alignment to the measuring object; IGA 740 also available with view finder
  • Laser protection filter (optional) to shield the laser wavelength for laser applications


The series 740 pyrometers are stationary instruments for non-contact temperature measurement of metallic surfaces, graphite, ceramics, etc. With the extremely fast response time of only 6 µs they are suitable for use in high speed applications.

2 types are available, the compact instrument IGA 740 with integrated optics and the IGA 740-LO with fiber and optical head.

For the IGA 740 an alternative focusable optics or macro optics is available. With the focusable optics a measuring distance between 450 and 3000 mm can be adjusted to achieve the smallest spot sizes. The macro optics provides at a fixed distance a spot size of only 0.7 or 1 mm, depending on the temperature range.

For easy alignment to the measuring object the instruments are equipped with an LED targeting light that shows the size of the spot. Alternatively the IGA 740 can be delivered with a view finder.

Typical Applications:

  • Laser applications (laser cutting, laser welding, soldering, etc.)
  • Material development / -testing
  • Combustion engines
  • Airbag testing
  • Wafer control
  • Turbines
  • Plasma measurements
  • Explosion processes



Technical Data

Temperature range:

MB 10   160 - 1000°C        

MB 14   300 - 1400°C  

MB 23   300 - 2300°C        

MB 25   500 - 2500°C 

Spectral range: 1.58 - 1.8 µm (MB 14 + 25);  1.58 - 2.2 µm (MB 10);   2.0 - 2.2 µm (MB 23)
Detector: Ge photo diode (MB 14 + 25);   InGaAs photo diode (MB 10 + 23)


0 or 4 - 20 mA (specify when ordering), temperature linear, max. load 500 ?

and 0 - 10 V linear voltage output (via BNC connector)

Emissivity ε: 0.1 ... 1; continuously adjustable

Response time t95:

9 µs via current output, 6 µs via voltage output 

Uncertainty: 0.75% of reading (ε = 1, Tamb.= 25°C, t95=1s)


< 0.3% of reading (ε = 1, Tamb.= 25°C, t95=1s)

Power supply: 24 V DC or AC; max. current consumption 0.2 A
Sighting: LED targeting light or view finder
Ambient temperature: 0 to 40°C
Storage temperature:  -20 to 70°C
Rel. humidity: No condensing conditions
Dimensions: 235 mm x 70 mm x 70 mm (L x W x H)
Protection class:  IP54 (according to DIN 40 050)
Weight: ~1.2 kg
CE label: According to EU directives about electromagnetic immunity

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