Raytek RAYMI3 High Temperature Sensing Heads
Starting at $1,012.00

Usually ships in 3-4 weeks [?]

Need Help? Call 1-800-884-4967 8:00am to 5:30pm ET


  • Response times of 10 mSec
  • Temperature range:
    • 1M; 932 to 3,272°F (500 to 1,800°C)
    • 2M; 482 to 2,552°F (250 to 1,400°C)
  • 1.0 or 1.6 µm spectral response sensors
  • Standard laser target sighting
  • IP65 rated sensing heads
  • high resolution LCD display for easy set-up
  • high resolution 100:1 optics
  • User configurable analog outputs
  • Standard USB 2.0 digital interface for remote set-up
  • Datatemp multi-drop & field calibration software included
  • Automatic sensing head detection–plug and play
  • ATEX & IECEx-proof version optional

The Raytek RAYMI3 High Temperature Sensing Heads are for use with the Raytek MI3 two-piece infrared temperature measurement system. The temperature ranges available are 932 to 3,272°F (500 to 1,800°C) and 482 to 2,552°F (250 to 1,400°C). The units have a distance to spot ratio of 100:1.

The Raytek MI3 is a powerful two-piece infrared temperature measurement system with miniature sensing head and separate communications electronics. The sensor is small enough to be installed just about anywhere, yet it outperforms much larger systems. Available in either a rugged cast metal electronics enclosure, an innovative multichannel DIN mountable enclosure, or low cost OEM configurations, the MI3 offers a host of advanced signal processing features you won't normally find in sensors costing much more.

The MI3 features a variety of sensing head options. High temperature sensors with a measurement range of 250°C to 1800°C (482°F to 3272°F), fast response (10 mSec), 1.0, 1.6 µm spectral response sensors and laser sighted 100:1 optics provide an impressive solution for your process needs. The rugged stainless steel sensing head ensures reliable long term performance in the harshest industrial environments. Although the MI3 sensor is small in size, it has all the performance you need for the most demanding applications.

Standard features include adjustable Emissivity, Peak Hold, Valley Hold, and Averaging functions. All sensor parameters are easily adjustable on the built-in user interface keypad, or remotely with the Windows 7 compatible DataTemp software via the built-in USB interface. Advanced features further extend the power of the MI3 and include user configurable alarm output, digital "recipe" table inputs that can be easily interfaced to an external control system, an external reset input for signal processing, and external inputs for analog emissivity adjustment or reflected energy compensation. Optional RS485, Modbus®, Profibus or Analog output network interfaces simplify intergration with a factory or machine control system.

The MI3's miniature size and low cost per measurement point make it ideal for installation at multiple points in your process. The MI3 is accurate, rugged, affordable, easy-to-install and operate. With the MI3, precision infrared temperature measurement is now an economical alternative.

Required Components

These additional components are required for the operation of your product. We strongly advise you to purchase these components unless you already own them or own a suitable alternative.

Raytek MI3 Electronics Modules
Electronics module with communications, output and LDC display for use with the Raytek MI3 sensor head
In Stock
Raytek MI3 & MI3M Series Interface Box
Multi-channel sensor interface box for Raytek MI3 and MI3M Series instruments
Raytek Ex-Power Supply
ATEX Ex power supply box, with 16.4ft (5m) long cable, that supports up to 2 intrinsically safe MI3 heads


Raytek XXXUSBCABLE USB Cable Assembly
USB cable assembly, 4 COND, USB-A(M), USB-MINI-B(M), Shielded, 2M

Power Supplies

Raytek XXXSYSPS Power Supply
24 VDC 1.2 A Industrial power supply, DIN rail mount (110/220VAC input)

Mounting Bracket

Raytek Stainless Steel Bracket
Stainless steel fixed or adjustable bracket


Please consider these optional accessories.

Raytek XXXMI3CERT Calibration Certificate
Calibration Certificate with NIST/DKD traceability
Raytek MI3 & MI3M Series Interface Box
Multi-channel sensor interface box for Raytek MI3 and MI3M Series instruments
Raytek XXXUSB485 USB Converter
USB to RS232/422/485 converter
Raytek Stainless Steel Mounting Nuts
Stainless steel mounting nuts (2), metric threads
Raytek Metric Air Purge Collar
Metric air purge collar
Raytek Right Angle Mirror
Right angle mirror, metric thread