Datasheet Sensirion SCD30 Sensor Module
CO2, humidity, and temperature sensor
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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 SummaryCMOSens® Technology for IR detection enables carbon dioxide measurements of the highest accuracy at acompetitive price.
Along with the NDIR measurement technology for detecting CO2 comes a best-in-class Sensirion humidity andtemperature sensor integrated on the very same sensor module. Ambient humidity and temperature can bemeasured 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 ventilationis needed to maintain a comfortable and healthy indoor environment and improve the well-being and productivityof the inhabitants. Sensirion sensor solutions offer an accurate and stable monitoring of CO 2 in the air, as wellas temperature and humidity. This enables our customers to develop new solutions that increase energy
efficiency and simultaneously support the well-being of everyone.

Content1 Sensor Specifications

22 Package Outline Drawing

43 Pin-Out Diagram

54 Operation and Communication

55 Shipping Package

56 Ordering Information

57 Important Notices

78 Headquarters and Subsidiaries

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1 Sensor Specifications1
CO2 Sensor Specifications
Parameter
CO2 measurement range
Accuracy2
Repeatability3
Temperature stability4
Response time5
Accuracy drift over lifetime6Conditions
I2C, UART
PWM
400 ppm – 10’000 ppm
400 ppm – 10’000 ppm
T = 0 … 50°C
τ63%

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
25°C, 0 – 100 %RH
τ63%-Value0 %RH – 100 %RH± 3 %RH± 0.1 %RH
8s
< 0.25 %RH / year

Conditions
0 – 50°C
τ63%-Value- 40°C – 70°C
± (0.4°C + 0.023 × (T [°C] – 25°C))± 0.1°C> 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

1 Default conditions of T = 25°C, humidity = 50 %RH, p = 1013 mbar, V DD = 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 basedon 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.
25 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 CO 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
2to 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 optimalperformance. 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
Average current10Max. current
DC supply voltage (Vddmin - Vddmax)

Conditions
Update interval 2 s
During measurement
Min. and max. criteria to operate SCD30

Interface-

Input high level voltage (VIH)
I2C
Input high level voltage (VIH)
Modbus
Input low level voltage (VIL)
I2C/Modbus
Output low level voltage (VOL)I2C/Modbus
Output high level voltage (VOH)
I2C/Modbus

Value
19 mA
75 mA
3.3 V – 5.5 V
UART (Modbus Point to Point; TTL Logic),
PWM and I2C

Min. and max. criteria to operate SCD30

1.75 V - 3.0 V

Min. and max. criteria to operate SCD30

1.75 V – 5.5 V

Min. and max. criteria to operate SCD30- 0.3 V – 0.9 V

IIO = +8 mA, Max. criteria

0.4 V

IIO = -6 mA, Min. criteria

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
Voltage to pull up selector-pin
Storage temperature conditions
Maintenance IntervalSensor lifetime

Conditions
Valid for CO2 sensor.
Non-condensing. Valid for CO2 sensor.
Exceeding specified range will result indamage of the sensor.
Max criteria
Min criteriaExceeding specified range will result indamage of the sensor.
Maintenance free when ASC fieldcalibration algorithm11 is used.
-Value0 – 50°C
0 – 95 %RH- 0.3 V – 6.0V
4.0 V
1.75 V- 40°C – 70°C
None
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

DimensionAB

CDNominal [mm]

23.00

35.00

7.00

1.60

Tolerance [mm]± 0.20± 0.20± 0.70± 0.20www.sensirion.com

EFGH

1.0015.24

1.40

1.40

± 0.15± 0.30± 0.15± 0.15

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3 Pin-Out Diagram
PinComments

VDD

Supply Voltage

GND

GroundTX/
SCLRX/SDA

Modbus: Transmission line (Push/Pull with 3V level)
I2C: Serial clock (internal 45kΩ pull-up resistor, pulled
to 3V, for higher voltages a level shifter is needed)
Modbus: Receive line (Input must not exceed 5.5V)
I2C: Serial data (internal 45kΩ pull-up resistor, pulled
to 3V, for higher voltages a level shifter is needed)

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, usevoltage 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 higher voltages a level shifter is needed.
Check VIH level of your I2C master to determine communication voltage. Please visit the download center of Sensirion
webpage for the I2C, Modbus and PWM interface documentation 12.

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.
ProductSCD30 sensor
SEK-SCD30-Sensor
SEK-SensorBridge

Description
CO2, RH and T sensor module
Standalone SCD30 sensor for EvalKit
Sensor Bridge to connect SEK-SCD30-Sensor to computer

Article Number1-101625-10
3.000.061
3.000.124

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Revision History
DateMay 2020www.sensirion.com

Revision
1.0Page (s)3555Changes
Refinement of electrical specification
Additional comments on Pin-Out diagram;
Makeover of chapter 4: operation and communication
Modified article number SEK-SensorBridge

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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 inpersonal injury. Do not use this product for applications other than its intended and authorized use. Before installing, handling, using orservicing this product, please consult the data sheet and application notes. Failure to comply with these instructions could result indeath or serious injury.
If the Buyer shall purchase or use SENSIRION products for any unintended or unauthorized application, Buyer shall defend, indemnify and holdharmless SENSIRION and its officers, employees, subsidiaries, affiliates and distributors against all claims, costs, damages and expenses, andreasonable attorney fees arising out of, directly or indirectly, any claim of personal injury or death associated with such unintended or unauthorizeduse, 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/ordegradation, 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 productshall 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 WITHOUTLIMITATION, 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 thegoods. SENSIRION explicitly disclaims all warranties, express or implied, for any period during which the goods are operated or stored not inaccordance 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) toimprove 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

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

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