IMPAC Pyrometer
IPE 140/34

Special version of IPE 140 with a spectral range of 3.43 µm for measurements of plastic films in a temperature range of 50 to 500 °C. 

Pyrometer IMPAC Series 140 View

Key Features

  • Measurement of plastic films, especially extremely thin PE and PP films with a thickness from 30 µm
  • Temperature range 50 to 500 °C
  • Spectral range 3.43 µm


The IPE 140/34 is a special pyrometer for non-contact temperature measurement of plastic films, especially extremely thin Polyethylen- or Polypropylen films with a minimum material thickness of only 30 µm.

Like the basic IPE 140, the IPE 140/34 is a highly accurate digital pyrometer. It is operating in an extremely narrow spectral range of 3.43 µm. This enables the precise measurement of plastic films.

3 different focusable optics are available for optimal match of the instrument to the application.


Technical Data

Temperature ranges:

MB 4    50 ... 400°C 

MB 5    75 ... 500°C 

Subrange: any range adjustable within the temperature range, minimum span 51°C

Spectral ranges:

3.43 µm

Signal processing: photoelectric current, digitized immediately


(ε = 1, t90 = 1 s, Tamb. = 23°C)

MB 3.5:      below 250°C:   1°C

                   above 250°C:   0.4% of reading in °C +1°C

All others:  below 400°C:   2.5°C

                   above 400°C: 0.4% of reading in °C +1°C


MB 3.5:       0.1% of reading in °C + 0.2°C

All others:   0.1% of reading in °C + 1°C 

Resolution: interface and display: 0.1°C, analog output: < 0.03 % of temperature range
Exposure time t90: 1.5 ms, with dynamical adaption at low signal levels; adjustable up to 10 s
Emissivity ε: 10 to 100% adjustable in steps of 0.1%
Analog output: linear 0 to 20 mA or 4 to 20 mA, DC, switchable; load max. 500 Ohm
Test current output: fixed 10 mA (for 0 to 20 mA analog output) or fixed 12 mA (for 4 to 20 mA analog output)
Power supply: 24 V AC/DC (12 to 30 V AC/DC) (AC: 48 to 62 Hz)
Power consumption: max. 6 VA
Serial interface: switchable inside the pyrometer: RS232 or RS485 addressable, half duplex; baud rate up to 115 kBd
Parameters: adjustable at the instrument or via serial interface: emissivity; response time; analog output; address; baud rate; waiting period tW; temperature unit °C or °F; setting of the maximum value storage; temperature sub range

Maximum value storage:


single or double storage; cleared by: preselected time interval; external deletion contact or via digital interface;

automatically with the next measuring object

Isolation: power supply, digital interface, analog output are galvanically isolated against each other and housing
Protection class: IP65 (DIN 40 050)  
Sighting: laser targeting light (max. power level < 1 mW, λ = 630-680 nm, CDRH class II) or thru-lens view finder
Ambient temperature: 0 to 53°C at housing
Storage temperature: -20 to 60°C
Weight:  approx. 550 g
Dimensions [mm]: 195 x 56 x 62.5 (l x W x D)
Mechanical tests: vibration proof corresponding DIN EN 60068-2-6, shock proof corresponding DIN EN 60068-2-27
Relative humidity: Non condensing conditions
CE-label: according to EU directives about electromagnetic immunity




IMPAC Pyrometer IPE 140/34
Focusable Optics 1-PE a=100...142 mm
Focusable Optics 2-PE a=185...390 mm
Focusable Optics 3-PE a=305...1900 mm

Display of optical path:

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