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FLAME SCANNER VIEWING HEAD FOR FLAME MONITORS, P/N: Model S512
FLAME SCANNER VIEWING HEAD FOR FLAME MONITORS, P/N: Model S512


 

Description
 
The S512 viewing head incorporates a PbS photo detector which has a spectral response that ranges from 1000-3000 nm (nanometers). It will detect all types of flames including natural gas and propane. It has nearly identical characteristics to the S509 with its Si detector turned off. It utilizes a Si filter which blocks all radiation above 1000nm (visible range and new infrared). In this respect it is identical to the PbS detector used in S509. However, an AR (anti-reflective) coating is used over the Si filter which prevents the longer wavelengths from being reflected resulting in a signal level about 2X greater that the S509 (with Si channel off).

The signal from the detector is a flicker signal. All flames pulsate creating a flicker component which is what the S511 detects. The flicker frequencies emitted from flames range 0-2000Hz. The S512 responds to only the higher frequencies while rejecting the lower frequencies which are part of the general furnace or background flames.

The S512 with its PbS photo detector has a linear response from low to medium brightness flames, that is, no distortion of flame signal occurs with regard to any amplifier saturation or AGC action (compression), However, saturation will occur with the PbS element on bright flame. This condition can easily be rectified by using orificing (placing disk with small aperture in front of lens to reduce the amount of light or radiation).

The S512 employs electronics self-checking which is implemented by using an electronic switch that disconnects the photo detectors every second for 200 milliseconds. The resulting chopped signal is fed to the signal processor which monitors the signal in a fail-safe manner.

The S512 is a bonafide infrared flame monitor (not to confused with the Si detector which are really visible light detectors). The S512 is particularly useful for multi-burner oil and coal fired boilers where discrimination is paramount consideration.

Please call or email for pricing and availability at 281-421-1321 or sales@pco2.com.



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