IMPAC Pyrometer
IN 5/9 plus

Digital pyrometer for non-contact temperature measurement of Sapphire and Sapphire Wafers between 0 and 1500 °C.

Pyrometer IMPAC IN 5/9 plus Front View
IMPAC Pyrometer IN 5/9 plus Back View Open
IMPAC Pyrometer IN 5/9 plus Back View Electrical

Key Features

  • Specifically designed for measurement on Sapphire and Sapphire Wafers
  • Pyrometer with analog output 0 or 4 to 20 mA, digital interface RS232 and laser targeting light
  • High accuracy due to digital linearisation of the output
  • Adjustable exposure time
  • Compact housing


The IN 5/9 plus is specially designed for non-contact temperature measurements on Sapphire and Sapphire Wafers.

It is a digital instrument that is equipped with an analog output and a digital interface enabling temperature indication and storage on a PC.

A temperature sub range can also be configured and the instrument parameters can be adjusted remotely.

For optimal match of the instrument to the application (size of the measuring object, distance) different optics are available.

For a precise alignment of the pyrometer to the measuring object, the instrument is equipped with a laser targeting light.

Typical Applications:

  • Sapphire
  • Sapphire Wafers


Technical Specifications

Measurement Specifications
Temperature Range: 0 to 1500 °C
Sub Range: Any range adjustable within the temperature range, minimum span 51 °C
Spectral Ranges: 8 to 9.7 μm
Optics: Zinc-Sulfide (ZnS)
Resolution: 0.1 °C on interface;
< 0.1% of temperature range at analog output
Emissivity ε: 0.2 to 1.2 switchable in the instrument (offline mode adjustable from 0.2 ... 1.0) or with the software InfraWin (online mode) in steps of 0.01
Measurement Uncertainty:
(ε = 1, t90 = 1 s,
TAmb = const.)

0.6% of reading in °C or 3 °C (Tamb= 15...30 °C)
1 % of reading in °C or 5 °C (Tamb
= 0...15 or 30...63 °C) whichever value is greater.

The instrument must be at a constant ambient temperature for a minimum of 60 minutes and has to be connected to the power supply.

(ε = 1, t90 = 1 s,
TAmb =  const.)

0.3 % of reading in °C or 0.6 °C

The instrument must be at a constant ambient temperature for a minimum of 30 minutes

Noise Equivalent
Temperature Difference (NETD):
(at σ=1, ε=1, Tamb.= 23 °C)

Temp      NETD at t90           NETD at t90
               = 180 ms /°C         =1 s/°C
350 °C        0.5                       0.2  
950 °C        0.4                       0.1
Exposure Time t90: 0.18 s; adjustable in the pyrometer: 0.5 s; 1 s; 2 s; 5 s, adjustable via interface: 0.5 s; 1 s; 2 s; 5 s; 10 s; 30 s

Laser targeting light 650 nm

Laser power level < 1 mW

Laser class 2 per IEC60825-1-3-4

Maximum Value Storage:

Built-in single and double store. Clearing with clear time tCL (0.1 s; 0.25 s; 0.5 s; 1 s; 5 s; 25 s), external contact or via interface or also automatically with each new item to be measured

Note: The calibration / adjustment of this pyrometer is carried out in accordance with VDI/ VDE 3511, Part 4.4. See for more information. 
Environmental Specifications
Protection Class: IP65 (DIN 40050)
Operating Position: any
Ambient Temperature: 0 to 63°C
Storage Temperature -20 to 70 °C
Relative Humidity: Non condensating conditions
Connection: 12 pin connector
Weight: 410 g
Housing: Stainless steel
CE Label: According to EU directives about electromagnetic immunity
Communication / Interface
Analog Output: adjustable 0 ... 20 mA or 4 ... 20 mA (linear)
Load: max. 500 Ohm at 24 V (max. 200 Ohm at 18 V)
Digital Interface RS232 (RS485 on request)
Parameters: Adjustable on the pyrometer (in offline mode):
     Emissivity, exposure time, 0/4 to 20       mA analog output range, online- / offline switch
Readable and adjustable via interface / PC (in online mode):
     Emissivity, exposure time, 0/4... 20 mA analog output range, sub temperature range, automatic clearing of the max./min value storage, external clearing of the max./min value storage, clear times of the max/min value storage, address, baud rate, internal temperature °C / °F, max. / min. selection, activation of ambient temperature correction


Power Supply: 24 V DC (18 ... 30V DC) nominal, ripple must be less than 0.5 V
Power Consumption: Max. 70 mA
Isolation: Power supply, analog outputs and digital interfaces are electrically isolated from each other
IMPAC Pyrometer IN 5/9 plus
Optics 1 a=95 mm
Optics 2 a=112 mm
Optics 3 a=160 mm
Optics 4 a=270 mm
Optics 5 a=400 mm
Optics 6 a=620 mm

Display of optical path:

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