IMPAC Pyrometer
IS 140-ET

Highly accurate, fully digital, fast Pyrometer with Ethernet interface and focusable optics for non-contact temperature measurements on metals, ceramics, graphite etc. between 550 and 3500 °C.

Pyrometer IMPAC IS140-ET

Key Features

  • Temperature ranges between 550 and 3500 °C
  • Short response times < 1 ms optional 500 μs
  • Extremely small spot sizes, min 0.35 mm
  • Built-in digital display
  • Optimized thru-lens view finder, laser targeting light or video module
  • Test current output
  • Housing with precision mounting rail for safe mounting and accurate alignment
  • Built-in Ethernet interface
  • Focusable optics


The pyrometers IS 140-ET is a digital, highly accurate pyrometer for non-contact temperature measurement on metals, ceramics, graphite etc.

ET types are equipped with an Ethernet interface.

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. The color camera module enables the optical alignment of the pyrometer to the measuring object via video screen or monitor.

Typical Applications

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


Technical Specifications

Measurement Specifications
Temperature Range:

MB 14:  550 ...1400 °C

MB 16:  600 ... 1600 °C 

MB 18:  650 ... 1800 °C

MB 25:  750 ... 2500 °C

MB 33:  900 ... 3300 °C

MB 18L: 550 ...1800 °C

MB 35L: 1100 ... 3500 °C

other temperature ranges on request

Sub Range: Any range adjustable within the temperature range, minimum span 51 °C
Spectral Ranges 0.7 - 1.1 µm
Signal processing: Photoelectric current, digitized immediately

Measurement Uncertainty:

(ε = 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


(ε = 1, t90 = 1 s, Tamb. = 23 °C)

0.1% of reading in °C + 1 °C
Resolution: 0.1 °C on interface; <0.1% of the adjusted temperature sub range at the analog output
Response time t90: < 1 ms, adjustable up to 10 s (“L” temperature ranges: with dynamical adaption at low signal levels)
Emissivity ε: 10.0 to 100.0% adjustable via interface in steps of 0.1%
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
Sighting: Laser targeting light (max. power level < 1 mW, λ = 630-680 nm, CDRH class II) or thru-lens view finder
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
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 http://info. for more information. 
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)
Serial Interface: Switchable inside the pyrometer: RS232 or RS485 addressable, half duplex; baud rate up to 115 kBd Alternatively: Profibus, Profinet, or Ethernet
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: Single or double storage; cleared by: preselected time interval; external deletion contact or via digital interface; 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. 2 VA
Isolation: Power supply, digital interface, analog output are galvanically isolated against each other and housing
Video Module (TV Version only)
Video signal: FBAS-Signal approx. 1 Vpp at 75 Ohm, PAL (B), 50Hz (optional NTSC (M), 60 Hz)
Resolution: 628 x 582 Pixel (510 x 492 at NTSC)
Illumination control: Automatic or adjustable (via keyboard or software)
Field of view: Approx. 6.3% x 4.6% (3.6° x 2.6°) of the adjusted measuring distance (5.1% x 3.9% (2.9° x 2.2°) for NTSC)
Connection video signal: SCART- or Cinch plug (monitor’s side); separate round plug (at the pyrometer); connections galvanically isolated; video signal selectable when more than one pyrometer with TV output is used
Date / time: Real time clock with about 3 days buffer (GoldCap capacitor, free of harmful substances)
Screen display: Circular target marker; instrument’s number or text to your choice (max. 12 characters); time and / or date (switchable); measured temperature, emissivity
IMPAC Pyrometer IS 140-ET
Focusable Optics 1 a=130...200 mm
Focusable Optics 2 a=190...420 mm
Focusable Optics 3 a=340...4000 mm

Display of optical path:

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