Crowcon Sensitron SMART S-IS Gas Detector with Electrochemical Cell

Code: SIS4A21
  • Toxic gas & O2
  • Intrinsically safe
  • Designed for Industrial areas

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Designed to meet the toughest industrial standards, the SMART S-IS series gas detectors are used to detect, in classified areas (zone 1 and, if equipped with the dust adapter, zone 21), the presence of toxic substances (ppm).

The premium electrochemical cell is used as a sensing element for the reading of toxic gases, which is well suited for detecting substances at low concentrations. The sensor is housed in a stainless steel head with a diameter of 47.5 mm.

The SMART S-IS detectors are internally equipped with a Zener barrier and a galvanic separation circuit that guarantees intrinsic safety protection.

The detector has a 12-24 Vdc power supply, a 4-20 mA signal output and an RS485 signal.

The SMART S-IS has a display (LCD or LED) to monitor the concentration in real time, and Hall effect sensors are used for non-intrusive calibration in the field.

The SMART S-IS detector has the following customisation possibilities:

  • Choice of the sensor head based on the gas to be detected
  • Choice of transmitter (type of display, 3-relay board, HART modem)
  • Choice of enclosure (aluminium/steel, number of entrances)

Order Information

4A Transmitter Exd Aluminum enclosure,four4 entries, copper free, electronics and features
SIS4A21 Electronic with output RS485+4-20 mA, LCD display, IS & GI card
SIS4A22 Electronic with output RS485+4-20 mA, LED display, IS & GI card
SIS4A23 Electronic with output RS485+4-20 mA, LCD display, 3-relay card, IS & GI card
SIS4A24 Electronic with output RS485+4-20 mA, LED display, 3-relay card, IS & GI card
2S Transmitter Stainless steel enclosure, electronics and features
SIS2S21 Electronic with output RS485+4-20 mA, LCD display, IS & GI card
SIS2S22 Electronic with output RS485+4-20 mA, LED display, IS & GI card
SIS2S23 Electronic with output RS485+4-20 mA, LCD display, 3-relay card, IS & GI card
SIS2S24 Electronic with output RS485+4-20 mA, LED display, 3-relay card, IS & GI card
SMART S HEADS FOR SMART S-IS
S5005O2 OXYGEN (O2) sensor head, 0-25% vol.
S5011SD SULPHUR DIOXIDE (SO2) sensor head, 0-20 ppm
S5049SD SULPHUR DIOXIDE (S02) sensor head, 0-100 ppm
S5012ND NITROGEN DIOXIDE (NO2) sensor head, 0-20 ppm
S5015CL CHLORINE (CL2) sensor head, 0-20 ppm
S5014HC HYDROCHLORIC ACID (HCL) sensor head, 0-50 ppm
Spares
S5005O2 OXYGEN (O2) sensor head, 0-25% vol.
S5011SD SULPHUR DIOXIDE (SO2) sensor head, 0-20 ppm
S5049SD SULPHUR DIOXIDE (S02) sensor head, 0-100 ppm
S5012ND NITROGEN DIOXIDE (NO2) sensor head, 0-20 ppm
S5015CL CHLORINE (CL2) sensor head, 0-20 ppm
S5014HC HYDROCHLORIC ACID (HCL) sensor head, 0-50 ppm

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Title Size
SmartS-IS Electrochemical Datasheet 6 MB

Additional information

Weight 0.190 kg

Specifications

Sensor
Application Industrial areas, ATEX Zone 1 and Zone 21 (if equipped with optional dust adapter)
Sensor Electrochemical cell
Estimated sensor life 2 / 3 years
Gas detected and range O2 [0-25% Vol], SO2 [0-20 ppm and 0-100 ppm], NO2 [0-20 ppm], Cl2 [0 – 5/20 ppm]; HCl [0 – 50 ppm]
Electrical parameters
Power supply 12-24 Vdc
Output Analogue 4-20 mA output; RS485 serial output; 3 relay board (optional); HART modem (optional)
Maximum dissipated power 4.5 W
Relays contact ratings 1.0 A a 24 Vdc
Visual indications LED or LCD display
Acoustic indications
Hall effect sensor Three sensors for calibration by magnet
Environmental conditions
Storage temperature 0 / +20°C for a maximum of 6 months
Operating temperature -20 / +50°C
Operating humidity 15 / 90% RH non-condensing
External case
Material Enclosure: die-cast aluminium with colour and chemically resistant epoxy paint or electropolished SS316 stainless steel
Sensor head: SS316 stainless steel
Protection mode Ex d : Explosion proof enclosure
Ex i: Intrinsically safe electronics.
Ex t : Equipment dust ignition protection by enclosure (when equipped with optional dust adapter)
Dimensions 138 x 200 x 120 mm (4A enclosure)
155 x 210 x 124 mm (2S enclosure)
Weight 2800 g (4A enclosure)
4200 g (2S enclosure)
Cable entries 4 x 3/4” NPT
IP grade IP65 (when equipped with optional dust adapter)
Compliance
EMC EN 61000-6-3:2007 + A1:2011; EN 50270:2015
ATEX ATEX directive 2014/34/EU
EN 60079-0:2012+A11:2013
EN 60079-1:2014
EN 60079-11:2012
EN 60079-31:2014
IECEx IEC 60079-0:2011
IEC 60079-1:2014
IEC 60079-11:2011
IEC 60079-31:2013
SIL EN 61508:2010 Parts 1, 2, 3, 4, 5, 6, 7
EN 50402:2017

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