Multi-gas, humidity and temperature sensor combo module
▪ Measures indoor air quality parameters total VOC (tVOC),
CO
2
-equivalent (CO2eq), relative humidity RH and
temperature T
▪ Automatic baseline compensation and humidity
compensation of MOX gas sensor
▪ Outstanding long-term stability and reliability
▪ Fully factory calibrated and tested
▪ Digital I2C interface
▪ 5V supply voltage
▪ Dimensions: 39 x 15 x 6.5 mm
Product Summary
The SVM30 is a Multi-gas, humidity and temperature sensor combo module containing an SGP30 gas sensor
as well as an SHTC1 humidity and temperature sensor.
The SGP30 gas sensor on the SVM30 combines multiple metal-oxide sensing elements − the pixels – on one
chip, thereby offering the possibility to measure a total VOC signal (tVOC) and a CO
2
equivalent signal (CO
2
eq)
with one single sensor-chip. The SVM30 further offers calibrated air quality output signals as well as
compensation of humidity cross-sensitivity. The sensing element features an unmatched robustness against
contamination by siloxanes present in real-world applications enabling a unique long-term stability and low drift.
The humidity and temperature sensor on SVM30 covers a humidity measurement range of 0 to 100 %RH and
a temperature measurement range of –20 to 85 °C with a typical accuracy of ±5 %RH and ±1°C.
The gas and RH/T sensor components are designed with Sensirion’s CMOSens
®
technology. This technology
offers a complete sensor system on a single chip, including the sensing elements, analog and digital signal
processing, A/D converter, calibration and data memory and a digital communication interface supporting I2C
standard mode. Sensirion’s state-of-the-art production process, including full calibration and testing of the
sensors, guarantees high reproducibility and reliability.
Multi-pixel MOX gas sensor
RH sensor
T sensor
SVM30
Calibration
memory
Linearization, Baseline
compensation, Humidity
compensation, Data processing
Linearization,
Temperature compensation,
Data processing
Calibration
memory
I2C interface / ESD protection / Power supply conversion
tVOC, CO
2
eq, RH, T
output
VDD
GND
www.sensirion.com
Version 1.1 – March 2019
1/18
Content
1 Gas, humidity and temperature sensor specification
1.1 Gas sensing performance
1.2 Air Quality Signals
1.3 Relative humidity
1.4 Temperature
1.5 Recommended operating conditions
2 Electrical specification
2.1 Electrical characteristics
2.2 Absolute maximum ratings
3 Timing specification
3.1 Sensor system timing
4 Mechanical specification
4.1 Sensor dimensions and mechanical design
4.2 Connector specification and pin assignment
5 Interface specification
6 Operation
6.1 Power-Up and Communication Start
6.2 Measurement Communication Sequence
6.3 Measurement Commands
6.4 Soft Reset
6.5 Get Serial ID
6.6 Checksum Calculation
6.7 Conversion of the sensor output for RH and T
7 Application description
7.1 Typical application diagram
7.2 Mounting recommendations
8 Quality
9 Ordering Information
10 Important notices
10.1 Warning, personal injury
10.2 ESD precautions
10.3 Warranty
11 Revision history
12 Headquarters and subsidiaries
3
3
4
5
5
5
6
6
6
6
6
7
7
7
8
9
9
9
11
13
13
14
14
15
15
15
16
16
17
17
17
17
18
18
www.sensirion.com
Version 1.1 – March 2019
2/18
1 Gas, humidity and temperature sensor specification
1.1 Gas sensing performance
The values listed in
Table 1
are valid at 25°C, 50% RH and typical VDD.
Parameter
Measurement
range
1
Specified
measurement
range
Signal
Values
Ethanol signal
0 ppm to 1000 ppm
H
2
signal
0 ppm to 1000 ppm
Ethanol signal
0.3 ppm to 30 ppm
H
2
signal
Ethanol signal
0.5 ppm to 3 ppm
see
Figure 1
typ.: 15% of meas. value
Comments
The specifications below are defined for this measurement
range
2
. The specified measurement range covers the gas
concentrations expected in indoor air quality applications.
Accuracy of the concentration
c
determined by
ln (⁄
) =
(
−
)
c
ref
= 0.4 ppm
Accuracy
3
,
4
H
2
signal
see
Figure 2
typ.: 10% of meas. value
Ethanol signal
Sensitivity
H
2
signal
Ethanol signal
H
2
signal
Ethanol signal
Long-term drift
3, 5
H
2
signal
Resolution
Sampling
frequency
Ethanol signal
H
2
signal
Ethanol signal
-1.0
-1.0
typ. tolerance: ±7% rel. error
max. tolerance: ±14% rel. error
typ. tolerance: ±7% rel. error
max. tolerance: ±14% rel. error
see
Figure 3
typ.: 1.3% of meas. value
see
Figure 4
typ.: 1.3% of meas. value
0.2 % of meas. value
Max. 40 Hz
a
= 512
s
out
: EthOH/H
2
signal output
c
ref
= 0.5 ppm
at concentration
c
s
ref
: EthOH/H
2
signal output
at 0.5 ppm H
2
Sensitivity
n
is defined by
−
= − ∙ ln (⁄
)
512
The typical numerical value of
n
is
n
= -1 for both, the
Ethanol and H
2
signal. The sensitivity is understood as an
average value over the specified measurement range as
determined by a least square fit.
Sensitivity
tolerance
3
Change of accuracy over time: Siloxane accelerated
lifetime test
6
Resolution of Ethanol and H
2
signal outputs in relative
change of the measured concentration
Compare with minimum measurement duration in
Table 13
H
2
signal
Table 1
Gas sensing performance.
1
Exposure to ethanol and H
2
concentrations up to 1000 ppm have been tested. For applications requiring the measurement of higher gas concentrations please
contact Sensirion.
2
ppm: parts per million. 1 ppm = 1000 ppb (parts per billion)
3
90% of the sensors will be within the typical accuracy tolerance, >99% are within the maximum tolerance.
4
Valid at an air flow of > 1m/s.
5
The long-term drift is stated as change of accuracy per year of operation.
6
Test conditions: operation in 250 ppm Decamethylcyclopentasiloxane (D5) for 200h simulating 10 years of operation in an indoor environment.
www.sensirion.com
Version 1.1 – March 2019
3/18
Accuracy ethanol signal
Accuracy H
2
signal
Figure 1
Typical and maximum accuracy tolerance in % of measured
value at 25°C, 50% RH and typical VDD. The sensors have been
operated for at least 24h before the characterization.
Figure 2
Typical and maximum accuracy tolerance in % of measured
value at 25°C, 50% RH and typical VDD. The sensors have been
operated for at least 60h before the characterization.
Long-term drift Ethanol signal
Long-term drift H
2
signal
Figure 3
Typical and maximum long-term drift in % of measured value
at 25°C, 50% RH and typical VDD. The sensors have been operated for
at least 24h before the first characterization.
Figure 4
Typical and maximum long-term drift in % of measured value
at 25°C, 50% RH and typical VDD. The sensors have been operated
for at least 60h before the first characterization.
1.2 Air Quality Signals
Parameter
Output range
Signal
TVOC signal
CO
2
eq signal
TVOC signal
Resolution
CO
2
eq signal
Value
0 ppb to 60000 ppb
400 ppm to 60000 ppm
0 ppb - 2008 ppb
2008 ppb – 11110 ppb
11110 ppb – 60000 ppb
400 ppm – 1479 ppm
1479 ppm – 5144 ppm
5144 ppm – 17597 ppm
17597 ppm – 60000 ppm
1 Hz
1 Hz
Comments
Maximum possible output range. The gas
sensing performance is specified for the
measurement range as defined in
Table 1
1 ppb
6 ppb
32 ppb
1 ppm
3 ppm
9 ppm
31 ppm
The on-chip baseline compensation algorithm
has been optimized for this sampling rate. The
sensor shows best performance when used
with this sampling rate.
Sampling rate
TVOC signal
CO
2
eq signal
Table 2
Air quality signal specification
www.sensirion.com
Version 1.1 – March 2019
4/18
Figure 5
Simplified version of the functional block diagram showing the signal paths of the gas sensor SGP30.
1.3 Relative humidity
Parameter
Accuracy tolerance
7
Repeatability
8
Resolution
9
Hysteresis
Operating range
Response time
11
Long-term drift
12
Table 3:
Humidity sensor specification
Conditions
In range of 25 ... 75 %RH and 5 ... 55 °C
-
-
-
non-condensing environment
10
63%
Typ.
Value
5.0
0.1
0.01
1
0 ... 100
8
<0.25
Units
%RH
%RH
%RH
%RH
%RH
s
%RH/y
1.4 Temperature
Parameter
Accuracy tolerance
7
Repeatability
8
Resolution
9
Operating range
Long-term drift
13
Table 4:
Temperature sensor specification
Conditions
In range of 5 ... 55 °C
-
-
-
Typ.
Value
1
0.1
0.01
–20 ... +85
<0.02
Units
°C
°C
°C
°C
°C/y
1.5 Recommended operating conditions
The sensors show best performance when operated within recommended normal temperature range of 5...55°C
and absolute humidity range of 4...20 g/m
3
. Long-term exposure (operated and not operated) to conditions
outside the recommended range, especially at high humidity, may affect the sensor performance. Prolonged
exposure to extreme conditions may accelerate aging. Furthermore, it may temporarily offset the RH signal (e.g.
+3%RH after 60h at >80%RH). After returning into the normal temperature and humidity range the RH-sensor
will slowly come back to calibration state by itself. To ensure stable operation of the gas sensor, the conditions
described in the document
SGP Handling and Assembly Instructions
as well as the
Infosheet Handling
7
8
Typical accuracy tolerance according to the document “Sensirion Humidity Sensor Specification Statement”. Valid for an air flow of > 1 m/s.
The stated repeatability is 3 times the standard deviation (3σ) of multiple consecutive measurement values at constant conditions and is a measure for the noise
on the physical sensor output.
9
Resolution of A/D converter.
10
Condensation shall be avoided because of risk of corrosion and leak currents on the PCB.
11
Time for achieving 63% of a humidity step function, valid at 25°C and 1 m/s airflow. Humidity response time in the application depends on the design-in of the
sensor.
12
Typical value for operation in normal RH/T operating range. Max. value is < 0.5 %RH/y. Value may be higher in environments with vaporized solvents, out-gassing
tapes, adhesives, packaging materials, etc. For more details, please refer to Handling Instructions.
京公网安备 11010802033920号
Copyright © 2005-2026 EEWORLD.com.cn, Inc. All rights reserved
电子工程世界
