7
TECHNICAL DATA
48
TT 51 SERIES
www.krohne.com
08/2015 - 4000754203 - MA TT 51 R03 en
7.4 Temperature data for areas with potentially explosive atmospheres
In-head transmitter
In-head transmitter
In-head transmitter
In-head transmitter
Intrinsically safe transmitter
Rail-mount transmitter
Rail-mount transmitter
Rail-mount transmitter
Rail-mount transmitter
Intrinsically safe transmitter
Temperature class
Ambient temperature T
a
T6
-40
°
C
≤
T
a
≤
+60
°
C / -40
°
F
≤
T
a
≤
+140
°
F
T5
-40
°
C
≤
T
a
≤
+75
°
C / -40
°
F
≤
T
a
≤
+167
°
F
T4
-40
°
C
≤
T
a
≤
+85
°
C / -40
°
F
≤
T
a
≤
+185
°
F
Temperature class
Ambient temperature T
a
T6
-20
°
C
≤
T
a
≤
+50
°
C / -4
°
F
≤
T
a
≤
+122
°
F
T5
-20
°
C
≤
T
a
≤
+65
°
C / -4
°
F
≤
T
a
≤
+149
°
F
T4
-20
°
C
≤
T
a
≤
+70
°
C / -4
°
F
≤
T
a
≤
+158
°
F
MA_OPTITEMP_TT_51_en_150828_4000754203_R03.book Page 48 Friday, August 28, 2015 10:54 AM
