IMPAC Pyrometer
ISR 6 Advanced

Stationary, digital ratio pyrometer for non-contact temperature measurement in ranges between 600 and 3000 °C

IMPAC Pyrometer ISR 6 Advanced
IMPAC Pyrometer ISR 6 Advanced Front Side View
IMPAC Pyrometer ISR 6 Advanced Front View
IMPAC Pyrometer ISR 6 Advanced Top Side View
IMPAC Pyrometer ISR 6 Advanced Top View
IMPAC Pyrometer ISR 6 Advanced Back Top View
IMPAC Pyrometer ISR 6 Advanced Back View
IMPAC Pyrometer ISR 6 Advanced Laser Back View
IMPAC Pyrometer ISR 6 Advanced Through Lens Sighting View

Key Features

  • Widest temperature ranges for most flexible process adaptation
  • Highest accuracy and repeatability in its class
  • “Dirty Window” Warning
  • Fully digital core for sub-ranging and adopted analog output
  • Very fast 2 ms response time for highly dynamic processes
  • Best optics in its class with manual focus capability
  • 4 digit LED display
  • Robust, stainless steel sensor for harsh environments (IP65/NEMA4)


The ISR 6 Advanced is a digital, compact and fast 2-color pyrometer for non-contact temperature measurement. The pyrometer measures in the 2-color method (ratio method) in which two adjacent wavelengths are used for the temperature determination. This technique offers the following advantages compared to standard 1-color pyrometers: the temperature measurement is largely independent of the object’s emissivity and in wide ranges unaffected by dust and other contaminants in the field of view.

The measuring object can be smaller than the spot size, measurements through dirty viewing windows are possible up to a certain contamination. Additionally, the pyrometer can be switched to 1-color mode and used like a conventional pyrometer in a spectral range near 0.9 μm. The response time of only 2 ms facilitates the measurement of fast processes.

The ISR 6 can be connected to a PC through an RS485 to USB connection, enabling parameter adjustments made using the InfraWin software. This can be used for temperature indication, data logging and further analyzing of complete temperature processes.

Optional Integrated Line Optics:

Besides the standard optical heads, the ISR 6 Advanced is also available with integrated line optics, which features a special spot in the shape of a line. This provides additional advantages for some applications such as wire production or pouring stream measurements.

Typical Applications

  • Steel Making
  • Metal Processing - Induction Processes: Hardening, Welding, Forging, Brazing, Soldering, etc.
  • Metal Processing - Noble Metals Melting and Purifying
  • Metal Processing - Wire/Rod Mill Water Box Measurement, Laying Head & Air Cooling Conv.
  • Solar Industry - Silicon Processing Multicrystalline casting in Vacuum Melting Furnace, Polycrystalline Silicon Ingot Growth in CVD Reactors (Siemens Process), Crystal Pulling of Monocrystalline Silicon (Czochralski Process)
  • Glass Industry - Gob Temperature Measurement
  • Cement Industry - Clinker temperature in rotary kilns


Technical Specifications

Measurement Specifications
Temperature Ranges

(MB 14)    600 to 1400 °C
(MB 18)    700 to 1800 °C 
(MB 25)    800 to 2500 °C
(MB 30)   1000 to 3000 °C 

Sub Range: Any range adjustable within the temperature range, minimum span 50 °C
Spectral Ranges: Channel 1: 0.9 μm;
Channel 2: 1.05 μm
Resolution: 0.1 °C or 0.2 °F at interface;
< 0.0015% of selected sub range at analog output, min. 0.1°C, 16 bit; 1°C or 1 °F on display
Emissivity ε:

0.050 to 1.000 in steps of 1/1000

(1-color mode)

Transmittance τ: 0.050 to 1.000 in steps of 1/1000 (1-color mode)
Emissivity Slope K: 0.800 to 1.200 in steps of 1/1000 (2-color mode) 
Measurement Uncertainty:
(ε = 1, t90 = 1 s,
TAmb. = 25 °C)
< 1500 °C: 0.3% of reading in °C + 2 °C
> 1500 °C: 0.6% of reading in °C
(ε = 1, t90 = 1 s,
TAmb. = 25 °C)
0.15% of reading in °C + 1 °C


Optical Specifications
Sighting Built-in laser aiming light (max. power level < 1 mW, λ = 630 to 680 nm, CDRH class II) or through-lens sighting
Optics: Manually focusable from rear cover measuring distance a = 210 to 5000 mm
Distance Ratio:

MB 14                           approx. 100 : 1

MB 18                           approx. 190 : 1

MB 25 and MB 30        approx.  350 : 1

Environmental Specifications
Protection Class: IP 65 IEC 60529 (value in mated condition)
Operating Position: any
Ambient Temperature: 0 to 65°C at housing
Storage Temperature -20 to 80°C
Relative Humidity: Non condensating conditions
Weight: 0.6 kg
Housing: Stainless steel
CE Label: According to EU directives about electromagnetic immunity

Note: MB is a shortcut used for temperature range (in German: Messbereich)

Connection: 12-pin connector
Display (in rear cover): LED, 4 digit matrix, 5 mm high for 2-color or 1-color temperature signal or measuring distance
Parameters: Adjustable via interface:
2-color / 1-color temperature signal, accordingly emissivity slope or emissivity, metal mode, temperature sub range, settings for maximum value storage, address, baud rate, switch off limit, "dirty window" warning, transmittance, response time t90, 0 to 20 mA or 4 to 20 mA analog output range, °C / °F
Readable via interface: measured value, internal temperature of the unit, measuring distance
Analog Output: Adjustable 0 to 20 mA or 4 to
20 mA, linear (via digital interface)
Digital Interface:

RS485 addressable (half-duplex)
Baud rate: 1200 Bd to 115.2 kBd
(on request RS232 (not addressable)

Switch Off Limit: 2% to 50% (adjustable via interface)
"Dirty Window" Warning:  Relay contact, max. continuous current 0.4 A, setting of the warning level: 0 (off) to 99%
Response Time t90: 2 ms (with dynamic adaption 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; 0.01s; 0.05 s; 0.25 s; 1 s; 5 s; 25 s), via interface, automatically with the next measuring object, external contact, hold-function


Power Supply: 24 V DC ± 25%, ripple must be less than 50 mV
Power Consumption: Max. 3 W ( incl. laser)
Load (analog output): 0 to 500 Ω
Isolation: Power supply, analog output and digital interface are galvanically isolated from each other
IMPAC Pyrometer ISR 6 Advanced
MB 14: Focusable Optic a=210 ...5000 mm
MB 18: Focusable Optic a=210 ...5000 mm
MB 25: Focusable Optic a=210 ...5000 mm
MB 30: Focusable Optic a=210 ...5000 mm

Display of optical path:

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