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gas detection sensor Amphenol INIR-ME5% offering high resolution and automatic range switching capabilities

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gas detection sensor Amphenol INIR-ME5% offering high resolution and automatic range switching capabilities

Description : Gas Sensor RoHS

Mfr. Part # : INIR-ME5%

Model Number : INIR-ME5%

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SGX Integrated IR (INIR) Gas Sensor

Product Overview
The SGX Integrated IR (INIR) sensor is a user-friendly digital gas sensor utilizing the latest SGX Sensortech Infrared technology. Designed for reliability and ease of implementation, it incorporates a microcontroller with an ARM7 core and embedded software to process raw signals into linear, temperature-compensated outputs proportional to gas concentration. The INIR offers triple-range detection with linear approximation for Carbon Dioxide and Methane, automatic range switching, high resolution up to 10ppm, and multi-sensor mode capabilities. It provides both analog and serial port (UART) communication, with active and reference signals monitored, and full fault diagnostics. Designed for use in hazardous areas, the INIR is certified for explosive atmospheres (EX). Its compact design and factory calibration options significantly reduce development time and expertise required for integration into gas detection instruments.

Key Features:

Triple Range detection with linear approximation for CO2 (0-5%) and Methane (0-5% and 0-100%).
Automatic switchover between detection ranges.
High resolution up to 10ppm.
Detectivity Level at 100ppm.
Multi-sensor mode.
Analog Output of gas concentration.
Serial port communication (UART).
Internal Temperature sensor.
Active & Reference Signals Monitored.
Full Faults Diagnostics & Error Generation.
Cyclic Redundancy Check (CRC).
Four Different Modes of Operation.
Typical low power consumption < 32mA (Average).
Factory calibrated for Methane or Carbon Dioxide.
Evaluation Kit available with PC software.
Easy implementation into Sensors Network.
Designed for use in Hazardous Areas.
Certified Sensor for use in Explosive Atmospheres (EX).

Recommended Applications:

Mining
Automation & Control
Indoor Air Quality
Industrial Health & Safety

Product Attributes

Brand: SGX Sensortech
Origin: Poland
Body Material: Stainless Steel
Certifications: ATEX, IECEx (II 2G Ex db IIC Gb Ta -40oC to +75oC)
RoHS Compliance: Yes
WEEE Directive: Component classification

Technical Specifications

Specification	Min	Typical	Max	Notes
Absolute Maximum Ratings
Supply Voltage	3.2 VDC	3.3 VDC	5.25 VDC
Average Current Consumption	30mA	32mA	35 mA	*Inrush Current can be up to 65mA
Logic Outputs Level
LOW Voltage Level (VOL)			0.6V	Maximum 1.6mA source current
HIGH Voltage Level (VOH)	2.0V			Minimum
Logic Inputs Level
LOW Voltage Level (VINL)			0.4V	Maximum
HIGH Voltage Level (VINH)	2.0V			Minimum
Humidity
Operating Humidity	0%	50%	99%	Condensation may affect performance. Algorithms implemented to minimize effects.
Storage Humidity	0%	50%	90%
Temperature
Operating Temperature	-40 C	+20 C	+75 C
Storage Temperature	-20 C	+20 C	+55 C
Temp. Cycle Limits		0.8C/min	1.3C/min
Pressure
Operating Pressure	80kPa		120kPa	Compensation will be required.
Storage Pressure	80kPa		120kPa
Performance
DAC Resolution		12-Bit at 0.0-2.5 Volts DC		Max Scalable according to Gas Conc.
Digital Signal Format		8 data bits, 1 stop bit, no parity
Baud Rate		38400 (default)		115200, 19200, 9600 supported
Dimensions (mm)
Diameter (D)	19.9	20	20.1
Height (H)	16.50	16.60	16.70
Pins Height (pH)	4.0	4.8	5.6
Weight	25 g	29 g	33 g
Pin Configuration
Pin 1	TXD (Data transmitted from the Integrated IR)
Pin 2	+VCC (3.2 Volts 5.25 Volts DC input)
Pin 3	GND (0 Volts reference)
Pin 4	RXD (Data received by the Integrated IR)
Pin 5	OUT (Analog Output)
Models / Calibration
Ordering Code	Methane Detection	Carbon Dioxide Detection	Standard Calibration
INIR-ME100%	YES	NO	0-100%
INIR-ME5%	YES	NO	0-5%
INIR-CD5%	NO	YES	0-5%
INIR-EK4	Evaluation Kit (without sensor)

Design Considerations

Warm-Up Time: 45 seconds after power ON or mode change. Data is not valid during this period.
Calibration: Factory calibrated; recommended calibration gases and procedures detailed in Application Note 1.
Gas Flow Rate: Recommended 450 500 cc/min for evaluation.
Digital Interface: Requires MCU or PC for reading digital output. Evaluation software compatible with Windows OS.
Faults Monitoring: Error monitoring and fault generation transmitted via UART every second.
Analogue Output: Updated every one second, directly related to concentration.
Condensation, Dust & Extreme Conditions: High corrosion resistance, temperature compensated. Condensation compensation algorithm implemented. Dust filters recommended for dusty environments.
Pressure Compensation: Required. Re-zeroing under operating conditions is recommended.
Ranges: Automatic switchover between LOW (0.0%-1.0%), MID (1.0%-4.0%), HIGH (4.0% and above).

Typical Performance Characteristics (at 20C, 10% RH, 101kPa, 500-1000 ml/min Gas Flow)

Test	INIR-ME100%, INIR-ME5%	INIR-CD5.0%
Stabilisation or Warm-up Time (EN)	0%v.v 0.1%Vol in 45 seconds	0%v.v 0.01%Vol in 45 seconds
Calibration Curve (EN) / Basic Error (AQ)	0 to 100% of full range -> 0.06%v.v or 6% of Reading	0 to 5%v.v -> 0.06%v.v or 6% of Reading
Short Term Stability (EN) of Displayed Value (AQ)	0%v.v = 0.005%v.v; 5%v.v = 0.1%v.v; 100%v.v = 1%v.v*3	0%v.v = 0.002%v.v; 5%v.v = 0.05%v.v
Minimum Resolution (AQ)	0 to 5%v.v -> 0.002%v.v; 5 to 100%v.v -> 0.1%v.v*3	0 to 2%v.v -> 0.004%v.v; 2 to 5%v.v -> 0.01%v.v
Long Term Stability (EN) / Working Stability (AQ)	0%v/v = 0.01%v.v / Month; 5%v/v = 0.1%v.v / Month; 100%v/v = 1.5%v.v / Month*3	0%v/v = 0.05%v.v / Month; 2%v/v = 0.05%v.v / Month; 5%v/v = 0.1%v.v / Month
Temperature Error (Compensation) (-40C to +75C, rel. to 20C)	0%v.v to 5%v.v = 0.05%v/v; 5%v.v to 20%v.v = 0.2%v.v3; 20%v.v to 100%v.v = 2%v.v3	0%v/v to 2%v.v = 0.01%v.v; 2%v/v to 4%v.v = 0.02%v.v; 4%v.v to 5%v.v = 0.05%v.v
Humidity Error (10%RH to 90%RH, rel. to 45%RH)	0%v.v = 0.05%v.v; 5%v.v = 0.1%v.v; 100%v.v = 1.5%v.v*3	0%v/v = 0.01%v.v; 5%v/v = 0.05%v.v
Response Time*2 (without dust filter)	Typ. T90 18 sec, Max T90 30 sec	Typ. T90 18 sec, Max T90 30 sec
Power Supply Variations (5% of Nominal Voltage)	Performance not affected if DC regulated voltage is provided.
Power Supply Rejection Ratio (PSRR) (5% of Nominal Voltage)	1 MHz -> 50 dB, 100 kHz -> 68 dB, 10 kHz -> 88 dB
Temperature Cycling/Ramping Drift (Max at 1.3C/min.)	0%v/v = 0.05%v.v; 5%v/v = 0.2%v.v; 100%v/v = 3%v.v*3	0%v/v = 0.05%v.v; 2%v/v = 0.1%v.v; 5%v/v = 0.25%v.v
Thermal Shock Drift	0%v/v = 0.05%v.v (max)	0%v/v = 0.05%v.v (max)
Uncertainty Error of Calibration	0.15%
Error of the Actual Reading	0.15%

Warranty & Warning

Warranty: 3 years from purchase date, subject to use according to datasheet and Application Note. Void if used outside specified conditions.
Conditions that void warranty: Water ingress, vandalism, label alteration, overvoltage/overcurrent, direct soldering, physical impact, opening/breaking the sensor, exposure to high dust/corrosive gases/acidic environments, painting/marking, custom modification, cleaning with acid. Recalibration voids calibration certificate, not warranty.
ESD Precaution: Device is ESD sensitive. Proper precautions should be taken.
Handling: Do not drop, avoid mechanical force, do not immerse in water, do not solder directly.
Operation: Power down instrument before plugging/unplugging sensor.

2411261541_Amphenol-INIR-ME5-_C1139050.pdf

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