ExplorIR-W Data Sheet
33Pages

ExplorIR®-WSmall Footprint Low Power CO2 Sensor DESCRIPTION The ExplorIR®-W is a small footprint low power NDIR CO2 sensors 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 ExplorIR®-W is designed for applications that need to work reliably over a wide range of conditions and environments. The sensor is available in multiple versions with several user selectable options, including temperature and RH measurement capability. The sensor will measure CO2 levels up to 100% concentration. FEATURES • Low power CO2 sensor • 70ppm typical measurement accuracy • Measurement range up to 100% • Solid state NDIR LED optical technology • UART control and data interface • Built-in auto-calibration APPLICATIONS • Agriculture • Healthcare • Safety • Aerospace • Food packaging • Incubators • Food storage and transportation Production Data, Revision 4.8, 23 June 2021 Page | 1 For regular updates, go to https://www.gassening.co.uk Copyright © 2021 Gas Sensing Solutions L

For regular updates, go to https://www.gassening.co.uk Production Data, Revision 4.8, 23 June 2021 Copyright © 2021 Gas Sens

Gas Sensing Solutions Ltd. Page | 3 For regular updates, go to https://www.gassening.co.uk Production Data, Revision 4.8, 23 June 2021 Copyright © 2021 Gas Sensing Solutions Ltd

ExplorIR®-W Small Footprint Low Power CO2 Sensor ORDERING INFORMATION EXPLORIR-W-X-XXX-X X 5 20 60 100 X H Blank X V Blank Measurement Range 0-5% 0-20% 0-60% 0-100% Temperature and RH Included Not included CO2 Voltage Output Included Not included Temperature Range Flow Adaptor Notes: 1. Sensors are shipped individually See separate data sheet for ExplorIR®-W evaluation kit options Gas Sensing Solutions Ltd. Page | 4 For regular updates, go to https://www.gassening.co.uk Production Data, Revision 4.8, 23 June 2021 Copyright © 2021 Gas Sensing Solutions Ltd

ExplorIR®-WSmall Footprint Low Power CO2 Sensor PACKAGE DRAWING: ExplorIR®-W PIN-OUT DESCRIPTION: ExplorIR®-W Production Data, Revision 4.8, 23 June 2021 Page | 5 For regular updates, go to https://www.gassening.co.uk Copyright © 2021 Gas Sensing Solutions Ltd.

ExplorIR®-W Small Footprint Low Power CO2 Sensor FLOW ADAPTOR DRAWING: ExplorIR®-W Notes 1. The flow adaptor is sealed over the existing outer body of the sensor and replaces the membrane cover of the standard sensor Gas Sensing Solutions Ltd. Page | 6 For regular updates, go to https://www.gassening.co.uk Production Data, Revision 4.8, 23 June 2021 Copyright © 2021 Gas Sensing Solutions Ltd.

ExplorIR®-WSmall Footprint Low Power CO2 Sensor ABSOLUTE MAXIMUM RATINGS Absolute Maximum Ratings are stress ratings only. Permanent damage to the ExplorIR® may be caused by continuously operating at or beyond these limits. The ExplorIR® 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...

ExplorIR®-W Gas Sensing Solutions Small Footprint Low Power CO2 Sensor CO2 PERFORMANCE CHARACTERISTICS Test Conditions Unless Otherwise Specified VDD = 3.3V, GND = 0V. CO2 = 450ppm, RH = 0% non-condensing, T= 25°C, Pressure = 1013mbar Production Data, Revision 4.8, 23 June 2021 Copyright © 2021 Gas Sensing Solutions Ltd. Page | 8 For regular updates, go to https://www.gassening.co.

ExplorIR®-WSmall Footprint Low Power CO2 Sensor HUMIDTY PERFORMANCE CHARACTERISTICS - ExplorIR®-W Option Notes 1. The output CO2 accuracy is degraded where ANALOGUE_OUTPUT <50mV, or >VDD-50mV 2. ANALOGUE_OUTPUT accuracy specified with a resistive loading @ >100Kohm Production Data, Revision 4.8, 23 June 2021 Page | 9 For regular updates, go to https://www.gassening.co.uk Copyright © 2021 Gas Sensing Solutions Ltd.

ExplorIR®-WSmall Footprint Low Power CO2 Sensor ELECTRICAL CHARACTERISTICS Production Data, Revision 4.8, 23 June 2021 Page | 10 For regular updates, go to https://www.gassening.co.uk Copyright © 2021 Gas Sensing Solutions Ltd.

ExplorIR®-WSmall Footprint Low Power CO2 Sensor PARAMETER Notes 1. The timing for FRESH_AIR_ZERO is identical to NITROGEN_ZERO 2. Ensure gas concentration is stable (t1) before beginning zeroing process Production Data, Revision 4.8, 23 June 2021 Page | 11 For regular updates, go to https://www.gassening.co.uk Copyright © 2021 Gas Sensing Solutions Ltd.

ExplorIR®-W Small Footprint Low Power CO2 Sensor METHOD OF OPERATION After power is applied to the ExplorIR®-W, 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 2 readings per second. The measurement rate is fixed at 2 readings per second at 9600 baud rate. The sensor will return the previous CO2 measurement results if the user requests more frequent measurements. The ExplorIR®-W has 3 potential modes of operation. MODE 0 COMMAND MODE In this mode, the sensor is in a SLEEP mode,...

ExplorIR®-WSmall Footprint Low Power 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...