TAKEX America Inc.

4/15 Howleys Road, Notting Hill,
VIC 3168

+61 3 9544 2477
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+61 3 9544 2477
TAKEX America Inc.
4/15 Howleys Road, Notting Hill, VIC 3168
Hot Metal Sensors / FD300A/FD600A Series

FD300A/FD600A Series


The optical head and detector amplifier are connected via a protected hi temperature glass fiber optic cable, whereby the captured infrared energy is transmitted onto the detector, which is installed at a remote location to better isolate the electronics from the heat source. This approach minimizes detector noise created in the detector electronics, which are caused by elevated temperatures (migrating electrons). The Optical Head location must be maintained at an ambient temperature below 200° C for reliable operation. The Amplifier location must be maintained at an ambient temperature below 50° C for reliable detection and relay output.

Sensors for low temperature (FD300A Series) and medium/high temperature (FD600A Series) are available.


Select a hood, amplifier, and fiber combination; based on the temperature range and size of the detection object. The temperature range varies depending on the fiber length and distance to the object to be detected. Temperatures shown in the table below are applicable only when the heated material (object) is larger than the detection field of view. If the material is smaller than the detection field, the lowest detectable temperature is higher than shown in the chart.

Amplifier Fiber Optic Cable Optical Head
(Lowest Detectable Temperature)
Model Output Method Type Model Length Standard View Wide View Narrow View
FD300A Mini power relay output
5A/250VAC Max
Low Temperature
(FD300A Series)
FG2 2m 360 °C 425 °C 490 °C
FG3 3m 375 °C 440 °C 510 °C
FG4 4m 385 °C 460 °C 525 °C
FD300AH Reed relay output
0.5A/48VDC Max
FG5 5m 395 °C 465 °C 540 °C
FG7 7m 415 °C 485 °C 560 °C
FG10 10m 455 °C 530 °C 610 °C
FD300AC Solid-state output
0.5A/250VAC/VDC Max
FG15 15m 490 °C 570 °C -
FG20 20m 510 °C 595 °C 680 °C
FG30 30m 540 °C 625 °C 720 °C
FD600A Mini power relay output
5A/250VAC Max
(FD600A Series)
FG2 2m 580 °C 660 °C 750 °C
FG3 3m 580 °C 660 °C 750 °C
FG4 4m 585 °C 665 °C 755 °C
FD600AH Reed relay output
0.5A/48VDC Max
FG5 5m 585 °C 670 °C 760 °C
FG7 7m 590 °C 675 °C 770 °C
FG10 10m 595 °C 680 °C 775 °C
FD600AC Solid-state output
0.5A/250VAC/VDC Max
FG15 15m 610 °C 695 °C -
FG20 20m 620 °C 710 °C 820 °C
FG30 30m 650 °C 740 °C 860 °C


Optical Head and Hood Combinations

Type Optical Head Hood Length
Airless hood Standard View OHA F38A 120mm
F38A-02 200mm
F38A-03 300mm
F38A-04 400mm
F38A-05 500mm
Wide View OHW1 OHW2 F38W 200mm
Air Purge Hood Standard View OHA F38PC-02 200mm
F38PC-03 300mm
F38PC-04 400mm
F38PC-05 500mm
Wide View OHW1 OHW2 302W ---


Optical Head Field of View explained

  The Field of View (FOV) can be a critical parameter in the selection process to maintain reliable object detection. If the object to be detected fills or overfills the FOV, there is no issue with repeatable detection or Minimum Resolveable Temperature (MRT).

However if it does not fill the FOV you may want to consider either a Narrow FOV head (please note the temperature shift to higher MRT), or consult the graphs and coefficient (K) calculations <by clicking here> to get a better understanding and estimates of the correct combination of Fibers, heads, and amplifier for your application.

When calculating your best fit; please note the correlation to distance, as relates to the FOV within the cone sensed by the system.

Type Model Field of View (FOV)
Standard View OHA
Wide View OHW1 OHW1 FOV
Narrow View Parallel View OHAN
Spot View OHAN10


  • No cooling required, so long as ambient detector temperature does not exceed 50° C and Optical head does not exceed 200°C.
  • Excellent durability
  • 5-point level indicator
  • Self-check feature integrated (SAFETY feature)
  • *Object to be detected must be larger than the Field of View for the chosen Head/Fiber/Amplifier or a correction coefficient must be calculated


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