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SGX Europe Sp. z o.o.
103 Ligocka Str.
40-568 Katowice
Poland
T: +48 737 759 839
E: sales.is@sgxsensortech.com
www.sgxsensortech.com
Integrated IR Propane
Datasheet
INIR-PR-01, ISSUE 1
Copyright © SGX Sensortech 2012-2019
GENERAL DESCRIPTION
Integrated IR FEATURES
Gas Sensor with Automatic Switchover between ranges,
High Resolution up to 10ppm,
Detectivity Level at 100ppm,
Multi-sensor mode,
Analog Output of gas concentration,
Serial port communication,
Internal Temperature sensor
Active & Reference Signals Monitored
Full Faults Diagnostics & Error Generation
Cyclic Redundancy Check (CRC)
Typical Low power consumption < 100mW (Average)
Factory calibrated for Propane or Carbon Dioxide
Evaluation Kit available including PC software for easy
testing and production calibration functions
Easy implementation into Sensors Network
Design for use in Hazardous Areas
Certified Sensor for use in Explosive Atmospheres (EX)
The Integrated IR (INIR) sensor has been designed with
the latest technology, using a microcontroller with an ARM7
core and via software design the necessary techniques have
been implemented to increase the reliability of the device
therefore minimize the probability of faults.
The INIR is a user friendly digital Gas Sensor, which is
designed to use the latest SGX Sensortech’s Infrared
technology.
The sensor is designed to decrease the implementation
time therefore increase productivity. The Integrated IR sensor
incorporates the necessary electronics and embedded
software to operate from a low voltage DC power supply. The
sensor will process the raw signals to output a linear,
temperature compensated signal proportional to the gas
concentration applied. The output signal is available in digital
and analogue forms.
The SGX Sensortech Integrated IR Gas Sensor provides
users with a simple method of incorporating an Infrared
Sensor into their gas detection instrument which will
significantly reduce the development time and expertise
required during the design and implementation phase. The
Integrated IR can also be factory calibrated to allow
installation without the need for recalibration.
RECOMMENDED APPLICATIONS
Automation & Control
Indoor Air Quality
Industrial Health & Safety
TECHNICAL SPECS
Whilst SGX Europe Sp. z o.o. has taken care to ensure the accuracy of the information contained herein it accepts no responsibility for the consequences of any use thereof and also
reserves the right to change the specification of goods without notice. SGX Europe accepts no liability beyond the set out in its standard conditions of sale in respect of infringement of
third party patents arising from the use of tubes or other devices in accordance with information contained herein. In case of modification of the product, SGX disclaims all liability.
Copyright © SGX Europe Sp. z o.o. 2012-2019
INIR-PR-01, ISSUE 1, March 2019

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Page 2 of 7
Integrated IR(INIR) Datasheet
ABSOLUTE MAXIMUM RATINGS
Power Supply
Min Typical
Max
Supply Voltage
3.2 VDC 3.3 VDC 5.25 VDC
Average Current
Consumption
30mA
32mA
*Inrush Current can be up to 65mA
35 mA*
Logic Outputs Level
LOW Voltage Level(VOL) :
0.6V Maximum
HIGH Voltage Level(VOH):
2.0V Minimum
1.6mA source current maximum
Logic Inputs Level
LOW Voltage Level(VINL):
0.4V Maximum
HIGH Voltage Level(VINH):
2.0V Minimum
Humidity
Operating Humidity
0%
50%
99%
Storage Humidity
0% 50% 90%
Condensation
(>100% Humidity)
Sensor’s Detection Limit, Stability &
Linearity would be affected, algorithms
are implemented to minimize as the
effect.
Temperature
Operating Temp.
-40 C
+20 C
+75 C
Storage Temp.
-20 C
+20 C
+55 C
Temp. Cycle Limits
0.8oC/min 1.3oC/min
Pressure ( Compensation will be required )
Operating Pressure
80kPa
-
120kPa
Storage Pressure 80kPa - 120kPa
Performance
DAC Resolution
12-Bit at 0.0-2.5 Volts DC Max
Scalable according to Gas Conc.
Operating Range
Digital signal format 8 data bits, 1 stop bit, no parity
Standard baud rate 38400 as default, 115200, 19200, 9600
Dimensions
Diameter (D)
19.9mm 20mm
20.1mm
Height (H)
16.50mm 16.60mm 16.70mm
Pins Height (pH)
4.0mm
4.8mm
5.6mm
Body Material
Stainless Steel
Weight
25 g 29 g
33 g
Gas Sensor Sockets
S1 5-Pin , Polygon Topology
PIN CONFIGURATION
Pin Name
Description
1 TXD Data transmitted from the Integrated IR.
2
+VCC
3.2 Volts 5.25 Volts DC input to Integrated
IR
3
GND
GND Plane, 0 Volts reference for Integrated
IR
4 RXD Data received by the Integrated IR.
Analog Output. Scalable range, see
5 OUT Application Note 1 Integrated IR Protocol &
Calibration for details.
Pad Pad Bootloader Pad. Not used by the customer.
NOTE1: All Dimensions in mm. All tolerances Linear +/-
0.1mm and Angular 0.5o unless otherwise stated.
NOTE2: Do not solder pins. Customer needs to make sure
to find the correct “sockets” for the Gas Sensor to firmly
“push fit” plug into their instrument so correct electrical
connection is achieved, also see handling precautions in
page 2.
Whilst SGX Europe Sp. z o.o. has taken care to ensure the accuracy of the information contained herein it accepts no responsibility for the consequences of any use thereof and also
reserves the right to change the specification of goods without notice. SGX Europe accepts no liability beyond the set out in its standard conditions of sale in respect of infringement of
third party patents arising from the use of tubes or other devices in accordance with information contained herein. In case of modification of the product, SGX disclaims all liability.
Copyright © SGX Europe Sp. z o.o. 2012-2019
INIR-PR-01, ISSUE 1, March 2019

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Integrated IR (INIR) Datasheet
Page 3 of 7
DESIGN CONSIDERATIONS & APPLICATIONS
Warm-Up Time
The Warm-Up Time for the INIR sensor is 45 seconds
after each power “ON” or every time when we are changing
from Configuration to Normal/Engineering Mode. During this
time data are not valid. Please read Fault codes in Application
Note 1, “Integrated IR Protocol & Calibration
The Warm-Up time is not including the period that the
sensor needs to reach the ambient temperature. The sensor
though is capable of producing readings during the Warm-Up
but with a much higher error than specifications.
Faults Monitoring/Error States
The Error monitoring and Fault generation happens every
second transmitted by the UART. Regularly check all the
Faults generated from the INIR to ensure errorless
communication and rise appropriate alarms depending on
the Fault code. For further information on the different Faults
and how to translate them, please read the Application Note
1, Integrated IR Protocol & Calibration”.
Calibration
For calibration process please read the appropriate
Application Note 1, “Integrated IR Protocol & Calibration”. For
optimum performance please use following cylinders:
INIR-PR2.1%
(Propane)
100% Nitrogen for Zero calibration
1.05% C3H8 for High Span Cal.
Always do Zero Calibration first followed by High Span.
Gas Flow Rate
For valid evaluation and to keep tests consistent it is
recommended to use 450 500 cc/min. flow rate to minimize
any effects due to pressure variations in the INIR.
Digital Interface/Communication
In terms of the Software implementation, we will
need a way to read the Digital Output by using a
Microcontroller (MCU) or a Personal Computer (PC) is
required. The Software with the Evaluation Kit is compatible
with Windows Operating System only and at the moment is
not possible to read the Analogue output by using the
Evaluation Software.
Analogue Output
The Analogue Output is updated every one second.
Analogue voltage is directly related with the Concentration.
Condensation, Dust & Extreme Conditions
Using the INIR in extreme environmental conditions may
affect its performance. Typically, the module has a high
corrosion resistance and temperature compensated
linearized output. The INIR implements an Condensation
Compensation Algorithm to minimize the effect especially
after power “ON”, eliminating the problem with false alarm.
The Sensor can withstand multiple thermal shocks that don’t
exceed 1.3oC/min temperature slopes. In applications like
mining where dust or other particles are present is
recommended to use a dust filter firmly attached to the inlet
of the INIR Gas Sensor. The filter tends to increase response
times T90, T10 and T50 therefore ensure correct installation
and evaluation to comply with regulations in your country. If
your device is intended to be used in a hazardous
environment, please seek advice from a certification body.
Pressure Compensation
The INIR will definitely need pressure compensation
irrelevant if the pressure is within the operating pressure. Re-
Zero the INIR Gas Sensor under operating conditions is
recommended; this will minimize the pressure effects,
temperature differential effects but will not eliminate the
weather effects like extreme wind velocity, rain or lighting.
Whilst SGX Europe Sp. z o.o. has taken care to ensure the accuracy of the information contained herein it accepts no responsibility for the consequences of any use thereof and also
reserves the right to change the specification of goods without notice. SGX Europe accepts no liability beyond the set out in its standard conditions of sale in respect of infringement of
third party patents arising from the use of tubes or other devices in accordance with information contained herein. In case of modification of the product, SGX disclaims all liability.
Copyright © SGX Europe Sp. z o.o. 2012-2019
INIR-PR-01, ISSUE 1, March 2019

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Page 4 of 7
Integrated IR(INIR) Datasheet
Fig. 1 -Example schematic for Interfacing Integrated IR (INIR)
TYPICAL PERFORMANCE CHARACTERISTICS
(All Characteristics are related to a calibrated sensor and conditions, Temperature 20oC, Relative Humidity 10%RH, Pressure 101kPa, 500
to 1000 ml/min Gas Flow, Averaging of 20 values, unless otherwise stated.)
Test
Stabilisation or Warm-up Time (EN) *1
Calibration Curve (EN)
or Basic Error (AQ)
Short Term Stability (EN)
of the Displayed Value(AQ)
Minimum Resolution (AQ)
Long Term Stability (EN)
or Working Stability (AQ)
Temperature Error (with Compensation)
(-40°C to +75°C, relative to 20°C)
Humidity Error
(10%RH to 90%RH, relative to 45%RH)
Response Time *2
(without dust filter)
Power Supply Variations
(at ±5% of Nominal Voltage)
Power Supply Rejection Ration (PSRR)
(at ±5% of Nominal Voltage)
Temperature Cycling or Ramping Drift
(Maximum at 1.3oC/min.)
INIR-PR2.1%
0%v.v ±0.1%Vol in 45 seconds
0 to 100% of full range -> 0.06%v.v
or 6% of Reading whichever is greater.
0%v.v = 0.005%v.v
2.1%v.v = 0.05%v.v
From 0 to 2.1%v.v -> 0.002%v.v
0%v/v = 0.01%v.v / Month
2.1%v/v = 0.1%v.v / Month
0%v.v to 2.1%v.v = 0.05%v/v
0%v.v = 0.05%v.v
2.1%v.v = 0.1%v.v
T90 < 30 sec
The Performance of the INIR is not affected by power supply variations as long as
the power supply provides DC Regulated voltage according to specifications.
at 1 MHz -> 50 dB , at 100 kHz -> 68 dB , at 10 kHz -> 88 dB
0%v/v = 0.05%v.v
2.1%v/v = 0.2%v.v
Thermal Shock Drift
0%v/v = 0.05%v.v (max)
Uncertainty Error of Calibration
±0.15% Error of the Actual Reading
*1 Wait for 45 mins for the Sensor to warm up and reach the Ambient Temperature after power on.
*2 NOTE: All data and tests are relating to EN 60079-29-1 and AQ 6211, European and Chinese standards. For more information about Average please read the Application Note 1, “Integrated IR Protocol &
Calibration”.
Whilst SGX Europe Sp. z o.o. has taken care to ensure the accuracy of the information contained herein it accepts no responsibility for the consequences of any use thereof and also
reserves the right to change the specification of goods without notice. SGX Europe accepts no liability beyond the set out in its standard conditions of sale in respect of infringement of
third party patents arising from the use of tubes or other devices in accordance with information contained herein. In case of modification of the product, SGX disclaims all liability.
Copyright © SGX Europe Sp. z o.o. 2012-2019
INIR-PR-01, ISSUE 1, March 2019

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Integrated IR (INIR) Datasheet
Page 5 of 7
CERTIFICATIONS DETAILS
Certificate
Standards
Product Marking
Special Conditions for
Safe Use
Manufacturing &
Certificate Address
ATEX
IECEx
Sira 99ATEX1121U
IECEx SIR 04.0031U
EN 60079-0:2012, IEC 60079-1:2014 Ed. 7
IEC 60079-0:2011 Ed.6, IEC 60079-1:2014-06 Ed.7
II 2G
Ex db IIC Gb
Ex db IIC Gb
Ta -40oC to +75oC
Power Input: 1.5W Maximum
Ambient temperature range: -40oC to +75oC
Condition 1: The thermal resistance of the Gas Sensing Heads do not exceed 25K/W. This shall be taken into
account when considering its surface temperature and the temperature classification of the equipment into
which it is to be incorporated. Tests indicated that an internal ignition increases the temperature of the mesh
by further 4.2K (including a 1.2 safety factor).
Condition 2: The Gas Sensing Heads shall be protected from impact in service. The Gas Sensing Head shall be
mounted in a protective enclosure such that an impact of 7 J in accordance with IEC 60079-0:2007 clause 26.4.2
from any direction shall not cause the impact head to make contact with the Sensing Head.
Condition 3: The Gas Sensing Heads are dust-proof (IP5X) but offers no protection against the ingress of water.
Where protection in excess of IP50 is required, then the apparatus into which the Gas Sensing Head is installed
shall provide the necessary ingress protection (for example by fitting an external semi-permeable membrane).
SGX Europe sp. z o.o., 40-568 Katowice, 103 Ligocka str., Poland
TYPICAL PERFORMANCE DATA
(All Data are related to a calibrated sensor and conditions: Temperature 20oC, Relative Humidity 10%RH, Pressure 101kPa, 500 to 1000
ml/min Gas Flow, Averaging of 13 values, unless otherwise stated.)
11. Do not use in acid environment or operate under gases
INTENDED USE
containing acid vapours or particles.
12. Do not custom modify the sensor.
This device has been designed to be used as component
together with instruments to detect flammable gas of
certain concentrations.
13. Do not clean the sensor with acid.
14. Recalibrating the sensor will only void the
calibration certificate not the warranty.
WARRANTY & WARNING
ESD PRECAUTION
The WARRANTY for all the INIR Gas Sensors is 2 years
from the purchased date based on use according to this
document and the INIR Application Note.
Warranty period or any extended warranties would
be confirmed with the order confirmation.
The warranty is invalidated if the sensor is used under
conditions other than those specified in this datasheet.
In addition, please pay attention to the following
conditions as they will void immediately the WARRANTY:
1. Do not allow water condensing into the sensor or deep
the sensor into water.
2. Do not vandalize the sensor.
3. Do not change label or cover it with other stickers.
4. Do not over voltage or overcurrent the sensor; always
observe the correct polarity of the input.
5. Do not solder directly onto the pins, pads or the
external body of the sensor.
6. Do not drop on the floor or hit it with tools.
7. Do not open, cut or break sensor apart.
8. Do not expose the sensor to high levels of dust.
9. Do not expose the sensor to corrosive gases or operate
under corrosive environments.
10. Do not paint or mark the sensor externally.
ESD (Electrostatic Discharge) sensitive device. Charged
devices and circuit boards can discharge without detection.
Although this product features patented or proprietary
subjected circuitry, damage may occur on devices subjected
to high energy ESD. Therefore, proper ESD precautions
should be taken to avoid performance degradation or loss
of functionality.
Warning! Plugging or Unplugging the Sensor while in
operation may damage the device beyond repair.
Always power down the instrument when
performing maintenance.
HANDLING PRECAUTIONS
A. Do not drop the Integrated IR on the floor as this could
cause damage to the pins or internal components.
B. Avoid mechanical force against pins or sockets. Protect
from dust and sprayed acidic particles .
C. Do not immerse in water or other fluids.
D. Do not solder the module directly onto a pcb or
to wires. Excessive heat could cause damage.
Whilst SGX Europe Sp. z o.o. has taken care to ensure the accuracy of the information contained herein it accepts no responsibility for the consequences of any use thereof and also
reserves the right to change the specification of goods without notice. SGX Europe accepts no liability beyond the set out in its standard conditions of sale in respect of infringement of
third party patents arising from the use of tubes or other devices in accordance with information contained herein. In case of modification of the product, SGX disclaims all liability.
Copyright © SGX Europe Sp. z o.o. 2012-2019
INIR-PR-01, ISSUE 1, March 2019