IGA 140/23-PB

Pyrometer with Profibus interface and focusable optics for non-contact temperature measurements on metals, ceramics, graphite etc. between 50 and 1800 °C

IMPAC Pyrometer IGA 140/23-PB
IMPAC Pyrometer IGA 140/23-PB with laser
IMPAC Pyrometer IGA 140/23-PB with laser

Key Features

  • Temperature ranges between 50 and 1800 °C
  • Short response times < 1.5 ms
  • Very small spot sizes, min 0.5 mm
  • Built in digital display
  • Parameter adjustments via integrated key pad or interface
  • Optimized thru-lens view finder or laser targeting light
  • Test current output
  • Housing with precision mounting rail for safe mounting and accurate alignment
  • Built-in Profibus interface
  • Focusable optics


The pyrometer IGA 140/23-PB is a digital, highly accurate pyrometers for non-contact temperature measurement on metals, ceramics, graphite etc.

The PB types are equipped with a Profibus-DP interface. They can easily be integrated in existing Profibus systems. As part of standard delivery, the GSD file offers a selection of 5 different module configurations for varying requirements. The project planning can be done with any project tool.

For optimal match of the instrument to the application, 3 different focusable optics with extremely small spot sizes are available.

The pyrometer parameters can be selected via the integrated key pad, the settings are indicated on the built-in LC-Display. In measuring mode the actual temperature is indicated.

A laser targeting light, a thrulens view finder or a color camera module (for standard versions only) for exact alignment of the pyrometer is available.

Typical Applications

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


Technical Specifications

Measurement Specifications
Temperature Range:

MB 7:    50 to 700 °C 

MB 9:    75 to 900 °C 

MB 13:  100 to 1300 °C 

MB 18:  150 to 1800 °C 

Sub Range: Any range adjustable within the temperature range, minimum span 51 °C
Spectral Ranges 2.0 to 2.6 µm
IR Detector: Indium Gallium Arsenide photodiode (extended InGaAs)
Signal processing: Photoelectric current, digitized immediately

Measurement Uncertainty:

(ε = 1, t90 = 1 s, Tamb. = 23 °C)

Up to 400 °C: 2 °C

400 to 1500 °C: 0.3% of reading in °C + 2 °C

Above 1500 °C: 0.5% of reading in °C


(ε = 1, t90 = 1 s, Tamb. = 23 °C)

0.1% of reading in °C + 1 °C
Resolution: 0.1 °C on interface and display; 16 bit D/A converter for analog output
Emissivity ε: 10.0 to 100.0% adjustable via interface in steps of 0.1%
Sighting:  Laser targeting  light (max. power level < 1 mW, λ =  630-680 nm, CDRH  class II) or thru-lens view finder
Operation signal: Green LED
LC display: Illuminated LC display for temperature indication or parameter settings 

Adjustable at the device  or via interface: Emissivity, Transmittance τ, exposure time t90, 0 to 20 or 4 to 20 mA, sub range, clear times for maximum value storage, automatically or external deletion of maximum value storage, address, baud rate, wait time tW

Readable at the device or via interface: Measuring temperature, internal instrument temperature.

Analog Output: 0 to 20 mA or 4 to 20 mA (linear), switchable; Test current 10 mA or 12 mA by pressing test key
Digital Interface: RS232 or RS485 addressable (half duplex), switchable; Baud rate 1200 up to 115200 Bd Alternatively: Profibus, Profinet, or Ethernet
Exposure Time t90: < 1.5 ms;  with dynamical adaption at low signal levels
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), extern, via interface or automatically with the next measuring object
Power Supply: 24 V AC/DC (12 to 30 V AC/DC)  (AC: 48 to 62 Hz) 
Power Consumption: max. 7.5 W
Load:  0 ... 500 Ω 
Switch Contact: Max. 0.15 A (only active with automatic clear mode or tCL ≥ 0.25 s) 
Isolation: Power supply, digital interface, analog output are galvanically isolated against each other and housing
Environmental Specifications 
Protection Class: IP65 (DIN 40 050)
Ambient Temperature: 0 to 70 °C  at housing
Storage Temperature: -20 to 80 °C
Weight:  Approx. 550 g 
CE Label:  According to EU directives about electromagnetical immunity
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 测温仪 IGA 140/23-PB
MB 7: Foc. Optics 1 a=105...150 mm
MB 7: Foc. Optics 2 a=190...440 mm
MB 7: Foc. Optics 3 a=320...4300 mm
MB 9: Foc. Optics 1 a=105...150 mm
MB 9: Foc. Optics 2 a=190...440 mm
MB 9: Foc. Optics 3 a=320...4300 mm
MB 13: Foc. Optics 1 a=105...150 mm
MB 13: Foc. Optics 2 a=190...440 mm
MB 13: Foc. Optics 3 a=320...4300 mm
MB 18: Foc. Optics 1 a=105...150 mm
MB 18: Foc. Optics 2 a=190...440 mm
MB 18: Foc. Optics 3 a=320...4300 mm