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ATEX approval
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The
sensor is ATEX approved to II 1G EEx ia IIC T4 (Ta = -40°C to +80°C). This designates the sensor as belonging
to; Group II: suitable for all areas except
mining, Category 1 G: can be used in areas with continuous,
long or frequent periods of exposure to hazardous gas (Zone 0).
Protection class ia, denotes intrinsically safe for all zones.
Apparatus group IIC: suitable for IIA to IIC explosive gas.
Temperature class T4: maximum sensor surface temperature under fault
conditions 135°C. Ambient temperature range extended to -40°C to 80°C.
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Galvanic Isolation Amplifier
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Intrinsically safe sensors must be used with a galvanically isolated amplifier
with safety parameters not exceeding:- Ui: 11.4V, Ii:
0.2A, Pi: 0.51W. Sensor can be installed with a cable length up to
1000m maximum from the amplifier, capacitance and inductance can be up to:-
Capacitance: 550 nF max, Inductance: 99 μH max.
Approved amplifiers
are available from Positek; there is a
choice of 0.5-9.5V or 4-20mA transmission outputs.
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