Ambient Temperature And Temperature Classes - Dräger Polytron SE Ex PR M1 DD Gebrauchsanweisung

Sensing head SE Ex LC NPT1 DD for a measuring
range of 0 to 10 %LEL
The sensing head Polytron SE Ex LC NPT1 DD com-
prises a gas sensor of type DrägerSensor LC NPT (type
of protection: flameproof enclosure "d" or type of protec-
tion: protection based on casing "t").
Sensing head SE Ex HT M DD for a measuring range
of 0 to 100 %LEL and operating temperature up to
150 °C
The sensing head Polytron SE Ex HT M comprises a
gas sensor type DrägerSensor HT M DD (protection
type flameproof enclosure and increased safety, "d"
resp. enclosure protection IP 6x, approved as
XDS 0211).
Ambient Temperature and Temperature
Classes
The allowed ranges of ambient temperatures (Ta
Ta ) and the associated temperature classes and
max
maximum surface temperatures are listed in the follow-
ing table:
Sensing head
Polytron
SE Ex PR M1 DD
SE Ex PR M2 DD
SE Ex PR M3 DD
SE Ex PR NPT1 DD
1)
SE Ex LC M1 DD
1)
SE Ex LC M2 DD
SE Ex LC M3 DD
SE Ex LC NPT1 DD
SE Ex HT M DD
1) Sensor performance specified up to +65 °C.
Not to be used in oxygen enriched atmospheres
None of the sensing heads and sensors mentioned
here is certified and approved to be operated in oxy-
gen-enriched atmospheres.
In conjunction with the central units Polytron SE Ex or
REGARD respectively REGARD-1 with pre-adjusted
alarm thresholds audible and visible alarm devices or
automatic countermeasures can be activated before the
detected gases or vapours can form dangerous flamma-
ble mixtures with air.
min
Part Ta
min
number
6812711 -50 °C +40/55/85 °C
6812710 -50 °C +40/55/85 °C
6812718 -50 °C +40/55/65 °C
6812800 -40 °C +40/55/60 °C
6812722 -40 °C +40/50/85 °C
6812721 -40 °C +40/50/85 °C
6812719 -40 °C +40/50/65 °C
6812801 -40 °C +40/50/60 °C
6812720 -50 °C +40/55/85/
WARNING
and
Ta temperature
max
class
T6/T5/T4
T6/T5/T4
T6/T5/T4
T6/T5/T4
T6/T5/T4
T6/T5/T4
T6/T5/T4
T6/T5/T4
T6/T5/T4/T3
150 °C
surface max.
temperature voltage
+130 °C 30 V
+130 °C 30 V
+130 °C 30 V
+130 °C 30 V
+130 °C 60 V
+130 °C 60 V
+130 °C 60 V
+130 °C 60 V
+130 °C 30 V
+195 °C
max.
power
2 W
2 W
2 W
2 W
1 W
1 W
1 W
1 W
2 W
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