IMPAC пирометр

Digital 2-color pyrometer with fibre optic for non-contact temperature measurement on metals, ceramics, graphite etc. between 300 and 2200 °C 

Pyrometer IMPAC IGAR 12-LO View
Pyrometer IMPAC IGAR 12-LO Inside View
Pyrometer IMPAC IGAR 12-LO Cover View
Pyrometer IMPAC IGAR 12-LO Cover Inside View
Pyrometer IMPAC IGAR 12-LO With Protection View

Key Features

  • Temperature ranges between 300 and 2200 °C
  • Highest accuracy, min. 0.5% of reading + 1 °C
  • Extremly fast, response time = 2 ms
  • Very small spot sizes, min 0.45 mm
  • 2-color- / mono- / metal mode (switchable)
  • Built-in laser targeting light
  • All parameters adjustable at the instrument
  • Output 0 ... 20 mA or 4 ... 20 mA (switchable)
  • Interface RS232 / RS485 (switchable)
  • Diagnostics function
  • Fibre optic and optical head withstand up to 250 °C


The pyrometer IGAR 12-LO is an digital, highly accurate 2-color pyrometers with fibre optic for non-contact temperature measurement. The pyrometer measures in the 2-color principle (ratio principle) in which two adjacent wavelength are used to calculate the temperature.

This technique offers the following advantages compared with the standard one-color pyrometers: The temperature measurement is independent of the emissivity of the object in wide ranges, it is unaffected by dust and other contaminants in the field of view, it is unaffected by dirty viewing windows, the measuring object can be smaller than the spot size. Additionally the pyrometer can be switched to 1-color mode and used like a conventional pyrometer. The metal mode allows measurements of metals and alloys with unknown k-factor (emissivity slope). The instrument is equipped with an optical fibre (length up to 30 m), which can be used in very high ambient temperatures up to 250 °C without cooling and it is unaffected by electromagnetical interferences.

Two different optical heads for different measuring distances and very small spot sizes are available. The very short response time of only 2 ms facilitates the measurement of fastest heating processes. All settings can be done directly at the instrument. The parametrizing can also be done with the PC and the standard operating software InfraWin. Additionally the software offers online temperature display and data storage. The diagnostics function allows to check pyrometer and wiring.

Typical Applications:

  • Induction heating
  • Welding
  • Casting
  • Forging
  • Annealing
  • Sintering
  • Rolling mill
  • Rotary kilns
  • Pouring stream
  • Research and development
  • Laser application


Technical Specifications

Temperature Ranges

MB 10          300...1000 °C 

MB 13          350...1300 °C 

MB 17          450...1700 °C 

MB 22          500...2200 °C 

MB 25          550...2500 °C 

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

1.52 to 1.64 μm

MB 22: 1.28 ... 1.65 µm


Display: 1 °C,     Interface: 0.1 °C

Analog output: < 0.025 % of adjusted temperature range


(ε=1, T90=1 s)

0.5% of reading in °C + 1 °C (< 1500 °C)

0.7% of reading in °C + 1 °C (> 1500 °C)


0.3% of reading in °C + 1 °C

Signal Processing: Photo current, digitized immediately
Emissivity slope K: ε1 2 : 0.800 to 1.200 adjustable in steps of 0.001
Emissivity ε: 0.1 to 1 adjustable in steps of 0.001
Measuring modes: Adjustable: ratio- (2-color-) / mono- / metal mode, switchable
Switch-off limit: 2% - 50% in 1% steps
Exposure Time t90: 2 ms (with dynamical adaption at low signal levels), adjustable up to 10 s
Maximum Value Storage:

Built-in single or double storage.

cleared by preselected time interval tclear (off; 0.01 s; 0.05 s; 0.25 s; 1 s; 5 s; 25 s) or extern or automatically with the next measuring object

Sighting system: Laser targeting (max. power level < 1 mW, λ = 630-680 nm, CDRH class II)

Note: The calibration / adjustment of this pyrometer is carried out in accordance with VDI/ VDE 3511, Part 4.4. See for more information. 


Analog Output:


0 to 20 or 4 to 20 mA switchable, load 0 to 500 Ohm test current 10 mA for inspection of wiring and connected instruments

Interfaces: Switchable: RS232 or RS485 addressable, half duplex; baud rate 2.4 up to 115.2 kBd
Display: Built-in 4-digit 7-segment-LED, height 13 mm; LED for °C / °F, clear mode „auto“, „ext“, ratio- (2-color-) / mono- / metal mode
Control Panel: 4 keys, switch for interface, key for test current

Adjustable at the instrument or via serial interface:

Emissivity ε, Emissivity slope K, response time t90, clear times tclear for maximum value storage, automatic or external deletion of the maximum value storage, setting of ratio- / mono- / metal mode, switch-off limit, analog output 0 to 20 or 4 to 20 mA, Temperature sub range, address, baud rate, Temperature display in °C / °F.

Power Supply: 24 V DC (15 to 40 V DC) or 24 V AC (12 to 30 V AC), 48 to 62 Hz
Power Consumption: Max. 600 mA
Isolation: Power supply, analog output and digital interface are galvanically isolated against each other
Switch contact: max. 0.15 A
Operating Temperature: At the converter housing: 0 to 50 °C 
Storage Temperature: -20 to 70 °C
Relative humidity: Non condensing conditions
Weight: Converter: 2.2 kg; optical head II: 140 g; fiber (2.5 m): 250 g
Protection Class: IP65 (according to DIN 40 050)
  2.2 kg
CE-Label: According to EU directives about electromagnetic immunity

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