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 CO
2
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.
Final Qualification results of SCD30 are still pending. Thus any specification is subject to change
without prior notice.
Benefits of Sensirion’s CMOSens
®
Technology
▪ High reliability and long-term stability
▪ Industry-proven technology with a track record of more than 10 years
▪ Designed for mass production
▪ Optimized for lowest cost
▪ Low signal noise
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Preliminary version 0.9 – D1 – April 2018
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Content
1 Sensor Specifications
2 Package Outline Drawing
3 Pin-Out Diagram
4 Operation and Communication
5 Shipping Package
6 Ordering Information
7 Important Notices
8 Headquarters and Subsidiaries
3
5
6
6
6
6
7
8
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1 Sensor Specifications
1
Preliminary information. Subject to change without notice.
CO
2
Sensor Specifications
Parameter
CO
2
measurement range
Accuracy
2
Repeatability
3
Temperature stability
4
Response time
5
Accuracy drift over lifetime
6
Table 1:
SCD30 CO
2
sensor specifications
Conditions
-
400 ppm – 10’000 ppm
400 ppm – 10’000 ppm
T = 0 … 50°C,
400 ppm – 10’000 ppm
τ
63%
400 ppm – 10’000 ppm
ASC field-calibration algorithm activated
Value
0 – 40’000 ppm
± (30 ppm + 3%)
± 10 ppm
± 2.5 ppm / °C
20 s
± 100 ppm
Humidity Sensor Specifications
7
Parameter
Humidity measurement range
Accuracy
8
Repeatability
3
Response time
5
Accuracy drift
Table 2:
SCD30 humidity sensor specifications
Conditions
-
25°C, 0 – 100 %RH
-
τ
63%
-
Value
0 %RH – 100 %RH
± 2 %RH
0.1 %RH
8s
< 0.25 %RH / year
Temperature Sensor Specifications
7
Parameter
Temperature measurement range
9
Accuracy
8
Repeatability
3
Response time
5
Accuracy drift
Conditions
-
0 – 50°C
-
τ
63%
-
Value
- 40°C – 70°C
± 0.3°C
0.1°C
>2s
< 0.03 °C / year
Table 3:
SCD30 temperature sensor specifications
Default conditions of T = 25°C, 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. Accuracy is fulfilled by > 90% of the sensors after calibration. Rough handling, shipping and soldering can falsify the
measurements. 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
2
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
CO
2
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 CO
2
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.
1
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Preliminary version 0.9 – D1 – April 2018
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Electrical Specifications
Parameter
Average current
10
Max. current
Energy consumption
Table 4
SCD30 electrical specifications
Conditions
Update interval 2 s
During measurement
1 measurement
Value
19 mA
75 mA
120 mJ
Operation Conditions, Lifetime and Maximum Ratings
Parameter
Temperature operating conditions
Humidity operating conditions
DC supply voltage
Storage temperature conditions
Interface
Maintenance Interval
Sensor lifetime
Value
0 – 50°C
0 – 95 %RH
3.3V – 5.5V
- 40°C – 70°C
UART and I
2
C
None
15 years
Conditions
Valid for CO
2
sensor.
Non-condensing. Valid for CO
2
sensor.
-
-
-
Maintenance free when ASC field-calibration algorithm
11
is used.
-
Table 5:
SCD30 operation conditions, lifetime and maximum ratings
10
11
Average current including idle state and processing. Other update rates and polling mode for small power budgets can be selected via the digital interface.
CO
2
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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Preliminary version 0.9 – D1 – April 2018
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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.
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