DIASYS netmation

Net IR-S Infrared Flame Detector


The proven IR-S type infrared flame detector that has been successfully installed in many power plants is combined with the Mitsubishi Power's latest control system, DIASYS Netmation, to create a product called Net IR-S type infrared flame detector. This flame detector product functions as a burner control system and meets the needs of thermal power plants for modern monitoring and control systems.

The sensor unit of Net IR-S is the same as a conventional IR-S sensor, and can be used for any of the following fuels: fuel oil, coal, and gas. In addition, its superb detection reliability, maintainability, and cost performance are maintained.


Furthermore, the decision circuit is built as a module of DIASYS Netmation. It is used along with an upper layer of Netmation to offer an easy-to-use interface. The panel of Net IR-S can be designed so that the Net IR-S works as a stand-alone flame detector system independent from a burner control system.

If you replace a conventional flame detector with this new type, the preexistent equipment can be reused.

Equipment name Existing methods of flame detection
UV Type IR Type
Sensor unit Replaced Replaced
Flame detector panel Replaced Replaced
Sensor cable Not replaced Replaced
Guide pipe Not replaced Not replaced
Cooling-air piping Not replaced Not replaced
Cooling fan Not replaced Not replaced


  • High sensitivity design
    The newly designed sensor circuit enables stable detection of the burner flame. The flame is detected through the unlit zone.
  • Extended detection range
    The sensor has 100 times the dynamic range of a conventional product and allows stable detection from slow combustion to a high intensity flame. No sensitivity adjustment is required for the sensor at the site.
  • Maintenance free
    A ball lens is used to eliminate the need to clean the sensor window.
  • Long-life sensor
    Because a long-life infrared semiconductor sensor is used, periodic replacement is not necessary.
  • Decreasing the number of panels
    The detector unit is compact with a space-saving design which allows one panel to incorporate 40 corners.
  • Reuse of existent boiler facilities
    When you replace a flame detector, work is not necessary for the boiler itself.
  • Reuse of the cable
    Changing the cable between the sensor and the panel is not necessary.

System Configuration

System Configuration

Flame detector panel

Flame detector panel

Flame detector unit

Flame detector unit

Flame detector

Flame detector

Fuel oil burner

The following is an example of a fuel oil burner,

Fuel oil burner


Sensor unit

The specifications of a sensor unit are as follows.

Item Specification
Type Explosion-proof (Exd2 BT4), waterproof
Dimensions Entire length Any value
Guide pipe 50A (40A)
Detection wavelength 500~1100nm
Sensor tip Not exceeding 400 deg C
Inside of guide pipe Not exceeding 200 deg C
Amplifer Not exceeding 60 deg C
Cooling air Air pressure [In-furnace pressure] + 150mmAq
Air flow 1.5Nm³/min per sensor

Flame detector panel

The specifications of a flame detector panel are as follows.

Item Specification
Dimensions 2,300mm(H) x 810mm(W) x 800mm(D)
Structure Flame detector unit, duplicated power supply system, terminal unit, duplicated media adapter
Flame on 1a
Low luminance level 1b
Power loss 1c
Contact capacity 125VAC/120VDC, 0.5A
Ambient temperature 0 to +50 deg C

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