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AF45-EX Single Channel Absorption Sensor |
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The model AF45-EX is a single channel UV absorption sensor
with an additional lamp reference channel.
The sensor is designed for inline operation and provides
accurate concentration measurements with great repeatability,
linearity and resolution. The AF45-EX can be used in hazardous
environments. |
The modular sensor consists of an intrinsically safe detector
housing and a flameproof stainless steel housing comprising
a lamp module as well as the reference detector module. The
appropriate converter can be located either in a safe area or
in a flameproof or pressurized enclosure directly in the
hazardous location. |
The AF45-EX uses light in the UV range at selected wavelengths.
A precisely defined, constant light beam penetrates
the process medium. The attenuation of the light intensity,
caused by absorption and/or scattering by dissolved and
undissolved substances, is detected by a photo diode.
The light intensity of the lamp itself is measured by a reference
photo diode and compensates for any lamp intensity variations. |
The special optical sapphire window provides superior
resistance to all abrasive and corrosive media.
The AF45-EX is available with a broad variety of line sizes,
process connections and wetted materials. NIST-traceable
validation accessories assure absolute measurement
confidence. |
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