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NSC Sicherheitstechnik B02706-00 Discovery Heat Detector
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The key difference between NSC Sicherheitstechnik's Discovery Heat Detector and ionisation and
optical smoke detectors is that the Discovery Heat Detector has a common profile but has a low
air flow resistance case made of selfextinguishing
white polycarbonate.
The Discovery Heat Detector uses a
single thermistor to sense the air
temperature at the detector position.
The thermistor is connected in a resistor
network, which produces a voltage
output dependent on temperature. The
design of the resistor network, together
with the processing algorithm in the
microcontroller, gives an approximately
linear characteristic from 10°C to 80°C.
This linearised signal is further
processed, depending on the response
mode selected, and converted to an
analogue output.
For the European standard version of the
detector, the five modes correspond to five
"classes" as defined in EN54-5:2001. The
classes in this standard correspond with
different response behaviour, each of
which is designed to be suitable for a
range of application temperatures. All
modes incorporate "fixed temperature"
response, which is defined in the standard
by the "static response temperature". The
application temperatures and static
response temperatures for all response
modes are given in Table 6.
In addition to the basic classification, a
detector may be given an "R" or "S"
suffix. The "R" suffix indicates that the
detector has been shown to have a rateof-
rise characteristic. Such a detector
will still give a rapid response even
when starting from an ambient
temperature well below its typical
application temperature. This type of
detector is therefore suitable for areas
such as unheated warehouses in which
the ambient temperature may be very
low for long periods.
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The "S" suffix on the other hand
indicates that the detector will not
respond below its minimum static
response temperature even when
exposed to high rates of rise of air
temperature. This type is therefore
suitable for areas such as kitchens and
boiler rooms where large, rapid
temperature changes are considered
normal.
Apollo part number 58000-400
Data Sheet
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Please note - Product designs and specifications are subject to change without notice. The user is responsible for determining the suitability of this product.
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