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Instruction and Safety Manual - SMART S
ENGLISH
31
2
CERTIFICATIONS
The gas detectors of the ST series have been designed for use in potentially explosive
atmospheres due to the presence of gas, vapour, mist and dust, classified as zone 1 or
zone 2 (or zone 21 or 22 when the dust cover is applied) according to IEC 60079-10-1 and
IEC 60079-10-2 classification.
When the detectors are used as safety devices against explosions, the
performance must be verified according to the standard IEC 60079-29-1
2.1
Marking
The detectors are equipped with an instrument label with one of the following markings
indicating the explosion protection mode:
Ex db IIC T* Gb
or
Ex db IIC T* Gb
Ex tb IIIC T*°C Db
IP65
or
Ex db op is IIC T* Gb
* See instrument label
Table 2: The data present on the marking label is explained below
Sensitron S.r.l.
Viale della Repubblica 48,
20010 Cornaredo MI Italia
Name and address of the manufacturer of the electrical device
ST/…/ ./..
Identification
s/n
Year
Serial number and year of production
IECEX CES yy.nnnn X
CESI: name of the laboratory that released the UE type certificate
yy: year of issuing of the certificate
nnnn: number of the certificate
X: certificate with special conditions for safe use
Ex db
Explosion proof protection mode based on IEC 60079-1
Ex op is
“Op is”
protection mode based on IEC 60079-28
IIC
Gas group, acetylene and hydrogen. (The equipment for the
group of gas IIC is also suitable for the groups of gas IIA e IIB.)
T*
Temperature class T* for flammable gas. (The equipment with a
given class of temperature is also suitable for all the substances
with a higher class of temperature (for example the detectors T6
