Hach ORBISPHERE 366 Series Basic User Manual page 7

LCIE certifies that the electrical apparatus has been found to comply with the essential Health and
Safety Requirements: EN 60079-0, EN 60079-11. These instruments are certified as follows:
• II (1)/1 G EX [ia Ga] ia IIC T6 Ga under EU type Examination Certificate number LCIE 03 ATEX
6354 X for the 3660EX
• II 1 G EX ia IIC T4 Ga under EU type Examination Certificate number LCIE 03 ATEX 6004 X for
the 3662EX
3660EX: The instrument is in the safe area and the sensor is in the hazardous area.
3662EX: The instrument and the sensor are in the hazardous area.
Category Explanation
ATEX marking: Surface apparatus with permanent explosive gas presence. Equipment (sensor)
II (1)/1 G
to be used in the explosive area, and safety device to be used in the safe area.
ATEX marking: Surface apparatus with permanent explosive gas presence. Equipment (sensor)
II 1 G
and safety device to be used in the explosive area.
Ex Explosion-proof apparatus built to the universal standards below:
ia Type of protection: The highest category, based on a safety factor of 1.5 on two faults. No
combination of two faults in the 3660EX/3662EX can produce a spark, or heating, causing ignition
of an explosive atmosphere.
IIC Gas group: Corresponds to the most flammable gases, including hydrogen.
T6 Temperature category: Maximum surface temperature of 85º C.
T4 Temperature category: Maximum surface temperature of 135º C.
Ga Equipment protection level.
W A R N I N G
Table 5 ATEX Certification
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