For Sensors with VP Connector
Certificate number:
Marking:
TÜV 15 ATEX 164143 X
II 1 G Ex ia IIC T4/T6 Ga
Electrical Parameters:
Temperature class
Maximum input
voltage U
i
Maximum input
current
I
i
Maximum input
power
P
i
T6
12 V
100 mA
40 mW
T4
18 V
170 mA
200 mW
Permissible internal capacitance
C
i
negligible
Permissible internal inductance
L
i
negligible
Thermal Parameters:
For the pH Sensor Type SE 557X/*-*VPN
[-***]
:
Temperature class Maximum input
power P
i
Ambient temperature range
of connecting head Ta
Permissible process
temperature
T6
40 mW
-20 °C < Ta < +55 °C
55 °C
T4
200 mW
-20 °C < Ta < +100 °C
100 °C
For the pH Sensor Type SE 557X/*-*VPH
[-***]
:
Temperature class Maximum input
power P
i
Ambient temperature range
of connecting head Ta
Permissible process
temperature
T6
40 mW
0 °C < Ta < +55 °C
55 °C
T4
200 mW
0 °C < Ta < +135 °C
135 °C
Special Conditions
• For ambient temperature range / process temperature, see parameters.
• The temperature class depends on the ambient temperature and the input power.
Observe the user manual.
• Metallic process connection parts shall be connected to the local equipotential bonding.
The intrinsically safe circuit is connected to ground.
Along this intrinsically safe circuit, potential equalization must exist.
For Sensors with Memosens Connector
Certificate number:
Marking:
BVS 09 ATEX E088 X
II 1G Ex ia IIC T3/T4/T6
Thermal Parameters:
For the pH Sensor Type SE 557X/*-*MSN
Temperature class Ambient temperature range of
connecting head Ta
Permissible process
temperature
T6
-20 °C < Ta < +70 °C
70 °C
T4
-20 °C < Ta < +120 °C
100 °C
T3
-20 °C < Ta < +135 °C
100 °C
For the pH Sensor Type SE 557X/*-*MSH [-***]
Temperature class Ambient temperature range of
connecting head Ta
Permissible process
temperature
T6
-20 °C < Ta < +70 °C
70 °C
T4
-20 °C < Ta < +120 °C
120 °C
T3
-20 °C < Ta < +135 °C
135 °C
Special Conditions
• The cable and the sensor shall only be used within the ambient temperature range specified for
the temperature class.
• Do not operate the Memosens sensors under electrostatically adverse process conditions.
Prevent strong vapor and dust streams from acting directly on the connection system.
Hazardous Areas: Electrical and Thermal Parameters
