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Specifications
Mfr. Part #:
INIR-ME5%
Key Attributes
Model Number:
INIR-ME5%
Product Description
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.v*3; 20%v.v to 100%v.v = 2%v.v*3 | 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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