Datasheet Sensirion SCD30 Sensor Module CO2, humidity, and temperature sensor NDIR CO2 sensor technology Integrated temperature and humidity sensor Best performance-to-price ratio Dual-channel detection for superior stability Small form factor: 35 mm x 23 mm x 7 mm Measurement range: 400 ppm - 10.000 ppm Accuracy: (30 ppm + 3%) Current consumption: 19 mA @ 1 meas. per 2 s. Fully calibrated and linearized Digital interface UART or I2C Product Summary CMOSens(R) Technology for IR detection enables carbon dioxide measurements of the highest accuracy at a competitive price. Along with the NDIR measurement technology for detecting CO2 comes a best-in-class Sensirion humidity and temperature sensor integrated on the very same sensor module. Ambient humidity and temperature can be measured by Sensirion's algorithm expertise through modelling and compensating of external heat sources without the need of any additional components. The very small module height allows easy integration into different applications. Carbon Dioxide is a key indicator for indoor air quality. Thanks to new energy standards and better insulation, houses have become increasingly energy-efficient, but the air quality can deteriorate rapidly. Active ventilation is needed to maintain a comfortable and healthy indoor environment and improve the well-being and productivity of the inhabitants. Sensirion sensor solutions offer an accurate and stable monitoring of CO 2 in the air, as well as temperature and humidity. This enables our customers to develop new solutions that increase energy efficiency and simultaneously support the well-being of everyone. Content 1 Sensor Specifications 2 2 Package Outline Drawing 4 3 Pin-Out Diagram 5 4 Operation and Communication 5 5 Shipping Package 5 6 Ordering Information 5 7 Important Notices 6 8 Headquarters and Subsidiaries 7 www.sensirion.com Version 0.94 - D1 - June 2019 1/7 1 Sensor Specifications1 CO2 Sensor Specifications Parameter CO2 measurement range Accuracy2 Repeatability3 Temperature stability4 Response time5 Accuracy drift over lifetime6 Conditions I2C, UART PWM 400 ppm - 10'000 ppm 400 ppm - 10'000 ppm T = 0 ... 50C 63% Value 0 - 40'000 ppm 0 - 5'000 ppm (30 ppm + 3%MV) 10 ppm 2.5 ppm / C 20 s 400 ppm - 10'000 ppm ASC field-calibration algorithm activated and 50 ppm SCD30 in environment allowing for ASC, or FRC field-calibration algorithm applied. Table 1: SCD30 CO2 sensor specifications Humidity Sensor Specifications7 Parameter Humidity measurement range Accuracy8 Repeatability3 Response time5 Accuracy drift Conditions 25C, 0 - 100 %RH 63% - Value 0 %RH - 100 %RH 3 %RH 0.1 %RH 8s < 0.25 %RH / year Conditions 0 - 50C 63% - Value - 40C - 70C (0.4C + 0.023 x (T [C] - 25C)) 0.1C > 10 s < 0.03 C / year Table 2: SCD30 humidity sensor specifications Temperature Sensor Specifications7 Parameter Temperature measurement range9 Accuracy8 Repeatability3 Response time5 Accuracy drift Table 3: SCD30 temperature sensor specifications Default conditions of T = 25C, humidity = 50 %RH, p = 1013 mbar, VDD = 3.3 V, continuous measurement mode with measurement rate = 2 s apply to values listed in the tables, unless otherwise stated. 2 Deviation to a high-precision reference in the calibrated range (400 - 10'000 ppm) of the SCD30. Accuracy is fulfilled by > 90% of the sensors after calibration. Rough handling, shipping and soldering reduces the accuracy of the sensor. Full accuracy is restored with FRC or ASC recalibration features. Accuracy is based on tests with gas mixtures having a tolerance of 1.5%. 3 RMS error of consecutive measurements at constant conditions. Repeatability is fulfilled by > 90% of the sensors. 4 Average slope of CO accuracy when changing temperature, valid at 400 ppm. Fulfilled by > 90% of the sensors after calibration. 2 5 Time for achieving 63% of a respective step function. Response time depends on design-in, heat exchange and environment of the sensor in the final application. 6 CO2 concentrations < 400 ppm may result in sensor drifts when ASC is activated. For proper function of ASC field-calibration algorithm SCD30 has to be exposed to air with CO2 concentration 400 ppm regularly. 7 Design-in of the SCD30 in final application and the environment impacts the accuracy of the RH/T sensor. Heat sources have to be considered for optimal performance. Please use integrated on-board RH/T compensation algorithm to account for the actual design-in. 8 Deviation to a high-precision reference. Accuracy is fulfilled by > 90% of the sensors after calibration. 9 RH/T sensor component is capable of measuring up to T = 120C. Measuring at T > 70C might result in permanent damage of the sensor. 1 www.sensirion.com Version 0.94 - D1 - June 2019 2/7 Electrical Specifications Parameter Average current10 Max. current DC supply voltage (Vddmin - Vddmax) Interface Input high level voltage (VIH) Input low level voltage (VIL) Output low level voltage (VOL) Output high level voltage (VOH) Conditions Update interval 2 s During measurement Min. and max. criteria to operate SCD30 Min. and max. criteria to operate SCD30 Min. and max. criteria to operate SCD30 IIO = +8 mA, Max. criteria IIO = -6 mA, Min. criteria Value 19 mA 75 mA 3.3 V - 5.5 V UART (Modbus Point to Point), PWM and I2C 1.75 V - 5.5 V - 0.3 V - 0.9 V 0.4 V 2.4 V Table 4 SCD30 electrical specifications Operation Conditions, Lifetime and Maximum Ratings Parameter Temperature operating conditions Humidity operating conditions DC supply voltage Voltage to pull up selector-pin Storage temperature conditions Maintenance Interval Sensor lifetime Conditions Valid for CO2 sensor. Non-condensing. Valid for CO2 sensor. Exceeding specified range will result in damage of the sensor. Max criteria Exceeding specified range will result in damage of the sensor. Maintenance free when ASC fieldcalibration algorithm11 is used. - Value 0 - 50C 0 - 95 %RH - 0.3 V - 6.0V 4.0 V - 40C - 70C None 15 years Table 5: SCD30 operation conditions, lifetime and maximum ratings 10 11 Average current including idle state and processing. Other update rates for small power budgets can be selected via the digital interface. CO2 concentrations < 400 ppm may result in sensor drifts. For proper function of ASC field-calibration algorithm SCD30 has to be exposed to air with 400 ppm regularly. www.sensirion.com Version 0.94 - D1 - June 2019 3/7 2 Package Outline Drawing Figure 1 Product outline drawing of SCD30. Pictures on the left show top-view, pictures on the right bottom-view. Sensor height is 7 mm at the thickest part of SCD30. The weight of one SCD30 sensor is 3.4 g. Table 6: Nominal dimensions and tolerances SCD30 Dimension A B Nominal [mm] 23.00 35.00 7.00 1.60 1.00 15.24 1.40 1.40 Tolerance [mm] 0.20 0.20 0.70 0.20 0.15 0.30 0.15 0.15 www.sensirion.com C D E Version 0.94 - D1 - June 2019 F G H 4/7 3 Pin-Out Diagram Pin Comments VDD Supply Voltage GND Ground TX/ SCL RX/ SDA Modbus: Transmission line (Push/Pull with 3V level) I2C: Serial clock (internal 45k pull-up resistor, pulled to 3V) Modbus: Receive line (Input must not exceed 5.5V) I2C: Serial data (internal 45k pull-up resistor, pulled to 3V) RDY Data ready pin. High when data is ready for read-out PWM PWM output of CO2 concentration measurement SEL Interface select pin. Pull to VDD (do not exceed 4V, use voltage divider in case your VDD is >4V) for selecting Modbus, leave floating or connect to GND for selecting I2C. Figure 2: Pin-out of the SCD30. 4 Operation and Communication Communication lines for I2C have an internal pull-up (45kOhm) to 3V. For communication voltages above 3V external pull-ups are required12. Please visit the download center of Sensirion webpage for the I2C, Modbus and PWM interface documentation13. 5 Shipping Package SCD30 sensor is shipped in stackable trays with 40 pieces each. The tray dimension is 363 mm x 257 mm x 19 mm. Stacking of trays results in an effective tray height of 13 mm. 6 Ordering Information SCD30 and accessory can be ordered via the following article numbers. Product SCD30 sensor SEK-SCD30-Sensor SEK-SensorBridge 12 13 Description CO2, RH and T sensor module Standalone SCD30 sensor for EvalKit Sensor Bridge to connect SEK-SCD30-Sensor to computer Article Number 1-101625-10 3.000.061 3.000.095 Check VIH level of your I2C master to determine communication voltage www.sensirion.com/file/scd30_interface_description www.sensirion.com Version 0.94 - D1 - June 2019 5/7 7 Important Notices 7.1 Warning, Personal Injury Do not use this product as safety or emergency stop devices or in any other application where failure of the product could result in personal injury. Do not use this product for applications other than its intended and authorized use. Before installing, handling, using or servicing this product, please consult the data sheet and application notes. Failure to comply with these instructions could result in death or serious injury. If the Buyer shall purchase or use SENSIRION products for any unintended or unauthorized application, Buyer shall defend, indemnify and hold harmless SENSIRION and its officers, employees, subsidiaries, affiliates and distributors against all claims, costs, damages and expenses, and reasonable attorney fees arising out of, directly or indirectly, any claim of personal injury or death associated with such unintended or unauthorized use, even if SENSIRION shall be allegedly negligent with respect to the design or the manufacture of the product. 7.2 ESD Precautions The inherent design of this component causes it to be sensitive to electrostatic discharge (ESD). To prevent ESD-induced damage and/or degradation, take customary and statutory ESD precautions when handling this product. See application note "ESD, Latchup and EMC" for more information. 7.3 Warranty SENSIRION warrants solely to the original purchaser of this product for a period of 12 months (one year) from the date of delivery that this product shall be of the quality, material and workmanship defined in SENSIRION's published specifications of the product. Within such period, if proven to be defective, SENSIRION shall repair and/or replace this product, in SENSIRION's discretion, free of charge to the Buyer, provided that: notice in writing describing the defects shall be given to SENSIRION within fourteen (14) days after their appearance; such defects shall be found, to SENSIRION's reasonable satisfaction, to have arisen from SENSIRION's faulty design, material, or workmanship; the defective product shall be returned to SENSIRION's factory at the Buyer's expense; and the warranty period for any repaired or replaced product shall be limited to the unexpired portion of the original period. This warranty does not apply to any equipment which has not been installed and used within the specifications recommended by SENSIRION for the intended and proper use of the equipment. EXCEPT FOR THE WARRANTIES EXPRESSLY SET FORTH HEREIN, SENSIRION MAKES NO WARRANTIES, EITHER EXPRESS OR IMPLIED, WITH RESPECT TO THE PRODUCT. ANY AND ALL WARRANTIES, INCLUDING WITHOUT LIMITATION, WARRANTIES OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, ARE EXPRESSLY EXCLUDED AND DECLINED. SENSIRION is only liable for defects of this product arising under the conditions of operation provided for in the data sheet and proper use of the goods. SENSIRION explicitly disclaims all warranties, express or implied, for any period during which the goods are operated or stored not in accordance with the technical specifications. SENSIRION does not assume any liability arising out of any application or use of any product or circuit and specifically disclaims any and all liability, including without limitation consequential or incidental damages. All operating parameters, including without limitation recommended parameters, must be validated for each customer's applications by customer's technical experts. Recommended parameters can and do vary in different applications. SENSIRION reserves the right, without further notice, (i) to change the product specifications and/or the information in this document and (ii) to improve reliability, functions and design of this product. Copyright(c) 2018, by SENSIRION. CMOSens(R) is a trademark of Sensirion All rights reserved www.sensirion.com Version 0.94 - D1 - June 2019 6/7 8 Headquarters and Subsidiaries Sensirion AG Laubisruetistr. 50 CH-8712 Staefa ZH Switzerland Sensirion Inc., USA phone: +1 312 690 5858 info-us@sensirion.com www.sensirion.com Sensirion Korea Co. Ltd. phone: +82 31 337 7700~3 info-kr@sensirion.com www.sensirion.co.kr phone: +41 44 306 40 00 fax: +41 44 306 40 30 info@sensirion.com www.sensirion.com Sensirion Japan Co. Ltd. phone: +81 3 3444 4940 info-jp@sensirion.com www.sensirion.co.jp Sensirion China Co. Ltd. phone: +86 755 8252 1501 info-cn@sensirion.com www.sensirion.com.cn Sensirion Taiwan Co. Ltd phone: +886 3 5506701 info@sensirion.com www.sensirion.com To find your local representative, please visit www.sensirion.com/distributors www.sensirion.com Version 0.94 - D1 - June 2019 7/7