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SprintIR-6S Data Sheet

SprintIR-6S Data Sheet

Product catalog summary

Introduction: The SprintIR®-6S is a compact, high-speed CO2 sensor designed for applications requiring rapid response and high-speed measurement. It utilizes advanced solid-state LED optical technology and is capable of taking 20 readings per second, measuring CO2 levels up to 100% concentration.

Features: Key features include high flow throughput capability, standard or custom flow adaptors, 70ppm typical measurement accuracy, a measurement range up to 100%, and a built-in auto-zeroing function. It supports UART control and data interface.

Applications: The sensor is suitable for use in healthcare, food packaging, sports science, and CO2 fire suppression deployment.

Technical Specifications:

Absolute Maximum Ratings: Supply voltages range from -0.3V to +6.0V, with an operating temperature range of 0°C to +50°C and storage temperature range of -40°C to +70°C.
Recommended Operating Conditions: Supply voltage (VDD) between 3.25V and 5.5V.
CO2 Performance Characteristics: Measurement accuracy varies with sensor type and CO2 concentration, with typical accuracies of ±(70, +5% of reading) ppm for lower ranges and ±(300, +5% of reading) ppm for higher ranges.

Mechanical and Electrical Characteristics: The sensor weighs approximately 10g and includes pin-out descriptions for both standard and membrane-covered versions. It is sensitive to ESD and requires proper handling precautions.

Operational Modes: The sensor supports multiple operational modes including command, streaming, and polling modes, with various digital filter settings and zero-point adjustment options.

Control Interface: The sensor uses a UART interface for communication, with detailed command protocols for various operations including auto-zeroing and pressure compensation.

Specifications:

Response Time: T90 without filter at 0.1l/min is 3.6 seconds, with filter 16 is 4.2 seconds.
Repeatability: At 25°C, 0-60% is ±70, +5% ppm; 0-100% is ±300, +5% ppm.
Current Consumption: Peak current when sampling is 35 mA, peak at turn-on is 40 mA, and in sleep mode (K2 polling) is 0.01 mA.

Electrical Characteristics:

Digital Input/Output: Input HIGH level is 1.8 V, LOW level is 1.0 V. Output HIGH level (IOH = +1mA) is 2.6-3.0 V, LOW level (IOL = -1mA) is 0.4 V.

Power Consumption: Active mode with K0 sleep mode consumes 0.03 mW, and K1 mode during measurements consumes 30 mW.

Response Time and Measurement Rate: The sensor has a fixed measurement rate of 20 readings per second. The gas exchange rate is crucial for response time, requiring approximately 14ml of gas per reading.

Digital Filter Settings: The sensor outputs both filtered and raw CO2 readings. Filter settings affect response time, with higher settings reducing noise but increasing response time. Recommended settings vary with flow rate.

Zero Point Setting: Methods include zeroing in known gas concentrations, nitrogen, or fresh air. The zero point is not cumulative and only the latest setting is effective.

Pressure and Concentration Level Compensation: The sensor compensates for pressure and concentration variations, calibrated at 1013mbar and 450ppm CO2. Compensation values can be adjusted for different altitudes and pressures.

Control Interface: The sensor is controlled via UART, allowing for reading and writing commands to adjust settings and retrieve data.

UART Command Protocol:

Commands must end with a carriage return and line feed (CR & LF), represented as '\r\n'.
Commands with parameters require a space between the command and parameter.
Unrecognized commands return a '?'.

Key Commands:

Z Command: Reports the latest filtered CO2 measurement. Syntax: 'Z\r\n'.
z Command: Reports the unfiltered CO2 measurement. Syntax: 'z\r\n'.
. Command: Returns the scaling factor for converting CO2 measurements to ppm.
K Command: Switches sensor modes. Syntax: 'K #\r\n'.
A Command: Sets the digital filter value. Syntax: 'A ###\r\n'.
F, G, U, u, X Commands: Various zero-point setting commands using different methods and gases.
P Command: Sets CO2 background concentration for auto-zeroing and zero-point setting.
@ Command: Configures auto-zero intervals. Syntax: '@ #.# #.#\r\n'.
S Command: Sets pressure and concentration compensation value. Syntax: 'S #####\r\n'.
M Command: Sets the number of measurement data types output by the sensor.
Y Command: Returns firmware version and sensor serial number.

Measurement Data Outputs:

The sensor can output filtered and unfiltered CO2 data. The mask value determines the data types output.

Auto-Zero Function:

Initial and regular intervals for auto-zeroing can be set in days. Disabling auto-zeroing is possible with '@ 0\r\n'.

Pressure and Concentration Compensation:

Commands 'S' and 's' are used to set and return the compensation value, respectively.

Conclusion: The document provides comprehensive details on the operation and configuration of the SprintIR®-6S sensor, focusing on UART communication and command protocols.

Important Notice: The document emphasizes that GSS products are sold under specific terms and conditions. It highlights that GSS reserves the right to change product specifications without notice and disclaims liability for applications in life support or critical systems. Customers are responsible for ensuring the suitability of GSS products for their applications.

Revision History: The document includes a revision history table, detailing updates from version 4.0 to 4.9, including changes to auto-zero language, parametric measurement limits, absolute maximum ratings, and response times.

Catalog excerpts

SprintIR®-6S High Speed CO2 Sensor DESCRIPTION The SprintIR®-6S is a small footprint high flow through NDIR CO2 sensor using state-of-the-art solid-state LED optical technology. The low power LEDs are manufactured in-house, giving GSS complete control of the CO2 sensor signal chain. The SprintIR®-6S is designed for applications that need fast response time and high-speed measurement capability. The SprintIR®-6S takes 20 readings per second, making it ideal for equipment that needs real-time CO2 gas analysis or monitoring. The sensor is available in multiple versions, capable of measuring CO2 levels up to 100% concentration. FEATURES • 20 readings per second • High flow throughput capability • Standard flow adaptor or custom options • 70ppm typical measurement accuracy • Measurement range up to 100% • Solid state NDIR LED optical technology • UART control and data interface • Built-in auto-zeroing APPLICATIONS • Healthcare • Food Packaging • Sport Science • CO2 Fire Suppression Deployment BLOCK DIAGRAM Production Data, Revision 4.9, 23 June 2021 Page | 1 For regular updates, go to https://www.gassening.co.uk Copyright © 2020 Gas Sensing Solutions Lt

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SprintIR®-6S High Speed CO2 Sensor ORDERING INFORMATION SPRINTIR-6S-X-X Notes: 1. Sensors are shipped individually 2. Custom flow through adaptors are available, contact GSS for options See separate data sheet for SprintIR®-6S evaluation kit options. Production Data, Revision 4.9, 23 June 2021 Page | 4 For regular updates, go to https://www.gassening.co.uk Copyright © 2020 Gas Sensing Solutions Ltd.

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SprintIR®-6S High Speed CO2 Sensor PACKAGE DRAWING: SprintIR®-6S NAME Rx_In Tx_Out GND VDD TYPE Digital Input Digital Output Supply Supply Gas Sensing Solutions Ltd. Page | 5 For regular updates, go to https://www.gassening.co.uk DESCRIPTION UART Receive Input UART Transmit Output Sensor ground Sensor supply voltage Production Data, Revision 4.9, 23 June 2021 Copyright © 2020 Gas Sensing Solutions Ltd

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SprintIR®-6S High Speed CO2 SensorPACKAGE DRAWING: SprintIR®-6S-M (WITH MEMBRANE COVER) Weight = ~10g PIN-OUT DESCRIPTION: SprintIR®-6S-M Production Data, Revision 4.9, 23 June 2021 Page | 6 For regular updates, go to https://www.gassening.co.uk Copyright © 2020 Gas Sensing Solutions Ltd.

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SprintIR®-6S High Speed CO2 Sensor ABSOLUTE MAXIMUM RATINGS Absolute Maximum Ratings are stress ratings only. Permanent damage to the SprintIR®-6S may be caused by continuously operating at or beyond these limits. The SprintIR®-6S functional operating limits and guaranteed performance specifications are given at the test conditions specified. ESD Sensitive Device. This sensor uses ESD sensitive components. It is therefore generically susceptible to damage from excessive static voltages. Proper ESD precautions must be taken during handling and storage of this device. Test Conditions Unless Otherwise...

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High Speed CO2 Sensor CO2 PERFORMANCE CHARACTERISTICS Test Conditions Unless Otherwise Specified VDD = 3.3V, GND = 0V, RH = 0% non-condensing, T= 25°C, Pressure = 1013mbar, Flow Rate = 0.1l/minute Production Data, Revision 4.9, 23 June 2021 Copyright © 2020 Gas Sensing Solutions Ltd. Page | 8 For regular updates, go to https://www.gassening.co.uk

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SprintIR®-6S High Speed CO2 Sensor ELECTRICAL CHARACTERISTICS Production Data, Revision 4.9, 23 June 2021 Page | 9 For regular updates, go to https://www.gassening.co.uk Copyright © 2020 Gas Sensing Solutions Ltd.

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SprintIR®-6S High Speed CO2 Sensor RESPONSE TIME, FLOW RATE AND MEASUREMENT RATE - SprintIR®-6S The SprintIR®-6S response time is dependent on several interrelated factors. Measurement Rate The measurement rate is fixed at 20 readings per second. Gas Exchange Rate The most important factor is the gas exchange rate. This is the amount of time it takes for the gas to enter the CO2 measurement chamber, measured and then replaced. The sensor has a gas measurement chamber volume of approximately 2.8ml. As a general rule of thumb, to properly exchange the gas in the chamber, there needs to be a x5...

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SprintIR®-6S High Speed CO2 Sensor METHOD OF OPERATION After power is applied to the SprintIR®-6S, the sensor will automatically start to take CO2 measurements using the Mode 1 default settings, where the sensor is pre-programmed to send CO2 measurement data at 20 readings per second. The measurement rate is fixed at 20 readings per second at a fixed 9600 baud rate. The sensor will return the previous CO2 measurement results if the user requests more frequent measurements. The SprintIR®-6S has 3 potential modes of operation. MODE 0 COMMAND MODE In this mode, the sensor is in a SLEEP mode, waiting...

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SprintIR®-6S High Speed CO2 Sensor DIGITAL FILTER The CO2 gas chamber is illuminated with a nominal 4.25um wavelength LED and the signal received using a photo-diode. The signal from the photo-diode is processed and filtered by the sensor to remove noise and provide an accurate CO2 reading. High frequency noise coming from the sampling process is removed using a proprietary lowpass filter. The digital filter setting can be varied, allowing the user to reduce measurement noise at the expense of the measurement response time. The ideal digital filter setting is application specific and is normally...

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SprintIR®-6S High Speed CO2 Sensor Sampling noise is progressively reduced with higher digital filter settings. It is recommended the user sets the highest value digital filter setting without compromising the required flow rate. Production Data, Revision 4.9, 23 June 2021 Page | 13 For regular updates, go to https://www.gassening.co.uk Copyright © 2020 Gas Sensing Solutions Ltd.

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