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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® 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 CO2 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
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1 Sensor Specifications
1
CO2 Sensor Specifications
Parameter
Conditions
Value
CO2 measurement range
I2C, UART
PWM
0 – 40’000 ppm
0 – 5’000 ppm
Accuracy2
400 ppm – 10’000 ppm
± (30 ppm + 3%MV)
Repeatability3
400 ppm – 10’000 ppm
± 10 ppm
Temperature stability4
T = 0 … 50°C
± 2.5 ppm / °C
Response time5
τ63%
20 s
Accuracy drift over lifetime6
400 ppm – 10’000 ppm
ASC field-calibration algorithm activated and
SCD30 in environment allowing for ASC, or
FRC field-calibration algorithm applied.
± 50 ppm
Table 1: SCD30 CO2 sensor specifications
Humidity Sensor Specifications
7
Parameter
Conditions
Value
Humidity measurement range
-
0 %RH – 100 %RH
Accuracy8
25°C, 0 – 100 %RH
± 3 %RH
Repeatability3
-
± 0.1 %RH
Response time5
τ63%
8 s
Accuracy drift
-
< 0.25 %RH / year
Table 2: SCD30 humidity sensor specifications
Temperature Sensor Specifications7
Parameter
Conditions
Value
Temperature measurement range9
-
- 40°C – 70°C
Accuracy8
0 – 50°C
± (0.4°C + 0.023 × (T [°C] – 25°C))
Repeatability3
-
± 0.1°C
Response time5
τ63%
> 10 s
Accuracy drift
-
< 0.03 °C / year
Table 3: SCD30 temperature sensor specifications
1
Default conditions of T = 25°C, 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 CO2 accuracy when changing temperature, valid at 400 ppm. Fulfilled by > 90% of the sensors after calibration.
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 = 120°C. Measuring at T > 70°C might result in permanent damage of the sensor.
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Electrical Specifications
Parameter
Value
Average current10
19 mA
Max. current
75 mA
DC supply voltage (Vddmin - Vddmax)
3.3 V – 5.5 V
Interface
UART (Modbus Point to Point), PWM and I2C
Input high level voltage (VIH)
1.75 V – 5.5 V
Input low level voltage (VIL)
- 0.3 V – 0.9 V
Output low level voltage (VOL)
0.4 V
Output high level voltage (VOH)
2.4 V
Table 4 SCD30 electrical specifications
Operation Conditions, Lifetime and Maximum Ratings
Parameter
Value
Temperature operating conditions
0 – 50°C
Humidity operating conditions
0 – 95 %RH
DC supply voltage
- 0.3 V – 6.0V
Voltage to pull up selector-pin
4.0 V
Storage temperature conditions
- 40°C – 70°C
Maintenance Interval
None
Sensor lifetime
15 years
Table 5: SCD30 operation conditions, lifetime and maximum ratings
10
Average current including idle state and processing. Other update rates for small power budgets can be selected via the digital interface.
11
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.
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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
C
D
E
F
G
H
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
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3 Pin-Out Diagram
Pin
Comments
VDD
Supply Voltage
GND
Ground
TX/
SCL
Modbus: Transmission line (Push/Pull with 3V level)
I2C: Serial clock (internal 45kΩ pull-up resistor, pulled
to 3V)
RX/
SDA
Modbus: Receive line (Input must not exceed 5.5V)
I2C: Serial data (internal 45kΩ 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 required
12
. Please visit the download center of Sensirion webpage for the I2C, Modbus and PWM interface
documentation
13
.
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
Description
Article Number
SCD30 sensor
CO2, RH and T sensor module
1-101625-10
SEK-SCD30-Sensor
Standalone SCD30 sensor for EvalKit
3.000.061
SEK-SensorBridge
Sensor Bridge to connect SEK-SCD30-Sensor to computer
3.000.095
12
Check VIH level of your I2C master to determine communication voltage
13
www.sensirion.com/file/scd30_interface_description
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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© 2018, by SENSIRION.
CMOSens® is a trademark of Sensirion
All rights reserved
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8 Headquarters and Subsidiaries
Sensirion AG
Laubisruetistr. 50
CH-8712 Staefa ZH
Switzerland
phone: +41 44 306 40 00
fax: +41 44 306 40 30
info@sensirion.com
www.sensirion.com
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
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