IMPAC Pyrometer
IGA 320

Small, short wavelength digital infrared thermometer for non-contact temperature measurement of metallic surfaces, graphite or ceramics between 300 and 2500 °C.

Pyrometer IMPAC IGA 320 View
Pyrometer IMPAC IGA 320 With Built-in LED Targeting Light View

Key Features

  • Small housing dimensions for easy installation in confined spaces
  • RS485 interface for connection to a PC in long transmission networks
  • Analog output adjustable to 0 or 4 to 20 mA for connection to standard analyzing instruments
  • Internal digital signal processing for high accuracy and long temperature ranges
  • High quality optics for measurement of small objects
  • Built-in LED targeting light for easy alignment to the measuring object


The IMPAC IGA 320 is a short wavelength infrared measuring instrument with internal digital signal processing. It is used for measurements of metallic surfaces, graphite and ceramics, etc.

The very small housing dimensions enable the integration of the pyrometer into compact production machines and the solid and robust design guarantees reliability even in harsh industrial environments.

The instruments are equipped with a choice of optics for small spot sizes. The LED targeting light enables precise alignment on the measurement object. It is automatically active and can be used during measurement.

In additional to the analog output the pyrometer is equipped with a digital RS485 interface, which enables secure data transmission to a PC or a PLC, over long distances. The included InfraWin software enables the graphical display and storage of measurement values; plus easy-set up of all instrument parameters.

Typical Applications

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


Technical Data

Measurement Specifications
Temperature Ranges:

MB 13: 300 ... 1300 °C 

MB 16.5: 350 ... 1650 °C 

MB 18: 400 ... 1800 °C

MB 25: 500 ... 2500 °C

Sub Range: Any range adjustable within the temperature range, minimum span: 51 °C

Spectral Ranges:

1.45 - 1.8 µm 

IR Detector:

Indium Gallium Arsenide photo diode (InGaAs)

Resolution: 0.1 °C on interface; < 0.025% of the adjusted temperature sub range at the analog output
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%
Measurement Uncertainty:
(κ = 1, t90 = 1 s, Tamb. = 23 °C)
up to 1500 °C: 0.3% of reading in °C + 1 °C
Above 1500 °C: 0.5% of reading in °C
(κ = 1, t90 = 1 s, Tamb. = 23 °C)
0.2% of reading in °C + 1°C
Environmental Specifications
Protection Class: IP 65 (IEC 60529)
Mounting Position: Any
Ambient Temperature: 0 to 70 °C
Storage Temperature: -20 to 70 °C
Relative Humidity: Non condensating conditions
Weight: 0.3 kg
Housing: Stainless steel
CE Label: According to EU directives about electro-magnetical immunity
Connection: 8-pin connector
Sighting: Built-in LED targeting light
Parameters: Adjustable via interface: Emissivity ε, transmittance τ, 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
Analog Output: 0 to 20 mA or 4 to 20 mA (linear) swtichable
Digital Interface: RS485 addressable (half-duplex), baud rate 1200 up to 38400 Bd
Hysteresis: 2 ... 20 °C, adjustable
Exposure Time t90: 2 ms (with dynamical adaptation at low signal levels); adjustable to 0.01 s; 0.05 s; 0.25 s; 1 s; 3 s; 10 s
Maximum Value Storage: Built-in single or double storage. Clearing with adjusted time tclear (off; 0.01 s; 0.05 s; 0.25 s; 1 s; 5 s; 25 s), via interface, automatically with the next measuring object
Power Supply: 24 V DC (10 to 30 V DC), ripple must be less than .5 V.
Power Consumption: Max. 1 W 
Load: 0 to 500 Ω
Switch Contact: Opto relays; max. 50 V DC, 0.2 A; Pmax = 300 mW
Isolation: Power supply, analog output and digital interface are galvanically isolated from each other

Note: The determination of the technical data of this pyrometer is carried out in accordance with VDI/VDE IEC TS 62942-2, the calibration / adjustment in accordance with VDI/VDE 3511, Part 4.4. See for more information.  

IMPAC Pyrometer IGA 320
MB 13 Optics 4
MB 13 Optics 5
MB 13 Optics 6
MB 16.5 Optics 5
MB 18 Optics 4
MB 18 Optics 5
MB 18 Optics 6
MB 25 Optics 4

Display of optical path:

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