SENSITRON
A Halma Company
MTEX4899
SMART S-MS MED
Manuale (IT)
P. 24/36
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 are suitable for substances with class
of temperature T5, T4, T3, T2 and T1).)
Ex tb
Type of protection for combustible dust by means of dust-proof enclosure based
on EN 60079-31
IIIC
Combustible dust group
T*** °C
Maximum surface temperature relating to combustible dust
IP65
IP degree of protection (1st number: protection against solids, 2nd number:
protection against liquids) guaranteed when the optional dust cover is applied
Gb/Db
EPL, Equipment Protection Level Gb or Db suitable for zone 1,2,21 and 22 surface
installation
* °C ≤ Ta ≤ * °C
Ambient temperature range
EN 60079-29-1:2016
Standard for functional performance
Vmax 28 Vdc
Maximum voltage supply which can’t be applied instantaneously, or irreparable
damage will occur. Maximum voltage supply as operating condition: 24 Vdc.
Pmax * W
Maximum dissipated power
Thread
Thread used for the entries of the enclosure
2.2
GAS APPROVED
In the following table are reported the gas approved for the gas detector SMART
S-MS MED, to approve each gas tests have been conducted following the EN
60079-29-1 standard.
Each gas detector of ST/../../.. series has a label with indication of the detectable
gas and the adjustment test gas.
The t90 is always less then 1 minute, as requested by the EN 60079-29-1
standard.
Gas
NP17SH
NP17
NP-ACSMM
Methane
1
1
Propane
0.75
0.47
N-butane
0.75
0.47
N-pentane
0.75
0.47
Gas
INP20
INP32
IFP32
Methane
x
x
Propane
x
x
R32
x
x
Table 3
Reference gas approved and conversion parameter for catalytic sensors. After, the possible infrared sensor models per each gas. For these sensors
there’s not a conversion parameter because the calibration curve is integrated in the sensing element.
Pellistor models
Infrared models
