OFT-10 Furnace Viewing Camera

A furnace viewing camera is a cooled optical probe that carries a camera inside a furnace, boiler or kiln wall so operators can see the combustion zone live. The Sertel OFT-10 uses a colour CCD camera inside a 50 mm air-cooled stainless steel probe rated for process temperatures up to 2000 °C, and returns a real-time colour image to an industrial flat-panel monitor.

Filtered compressed air flows continuously through a multilayer jacket in a triple-flow stainless steel housing, holding the CCD assembly well below process temperature. The system needs 750 litres (25 ft3) per minute of free air at 4-7 bar from the normal plant compressed air supply.

An alarm condition triggers the pneumatic retraction system, which withdraws the assembly from the hot zone before heat can damage the optics. Volt-free changeover contacts rated at 5 A pass the alarm to your remote indication panel or plant alarm management system. Local isolation of the auto-retract action is provided so maintenance staff can work on the unit safely.

No. The OFT-10 views the furnace interior directly through the probe tip. Removing the window removes the two problems that come with it: image quality falling off as the glass fouls or crazes, and the cleaning routine needed to hold that quality.

Probe length is manufactured to match your furnace wall and refractory thickness, normally between 750 mm and 2500 mm. Send us the wall build-up and the existing port dimensions and our engineers will confirm the length and mounting arrangement.

75 Ω coaxial cable between the junction box and the monitor, and 6-core cable if alarm signals are duplicated at a remote location. Retraction signalling runs over optical fibre or twisted pair to suit the site. The junction box takes 90–260 V AC at roughly 15 W and the 36 cm monitor takes 100–240 V AC at roughly 30 W.

Periodic filter replacement and occasional cycling of the retraction mechanism to confirm it operates correctly are required. Filters are replaced in situ, without withdrawing the camera from the furnace, so the unit stays installed during service.

Yes. An optional ceramic coating over the stainless steel triple-flow housing is available for chemically aggressive atmospheres such as those found in incineration, cement and some non-ferrous processes.