www.sensirion.com / D1

Version 3

– April 2022

17/18

10 Bibliography

[1] K. Ehrhorn, "A Humidity Sensor and a Methode for Manufacturing the Same.". UK, DE, FR, NL, DM, BE, US, CN

Patent EP1810013, US7741950, CN101040181, 2005.

[2] Sensirion, "Handling Instructions for Humidity Sensors," 2020.

11 Revision History

Date

Version

Page(s)

Changes

October 2020

1

all

Initial release

July 2021

2

multiple

3

4

4

10

9

12

15

11

12

12

16

Typo correction

Included checksum in Figure 1

Included description of NIST traceability in section 2

Included repeatability clarification in Table 1

Clarified I2C communication in section 4.1

Removed waiting time specification in Table 4

Specified serial number in 4.7

Updated qualification status in section 6

Deleted binary com. & included return values in Table 7

Updated note on duty cycle of heater in section 4.9

Added note on large current drawn by heater in section 4.9

Updated ordering information in Table 10

April 2022

3

multiple

multiple

4

4

4

9

10

16

16

Included SHT45 RH- and T-accuracy specifications

Extended max. heater duty cycle to 10%

Reduced RH response time to 4s in Table 1

Reduced long-term drift to <0.2 %RH/y in Table 1

Reduced hysteresis to ±0.8%RH at 25°C in Table 1

Updated max. measurement times in Table 4

Included I2C communication timing in section 4.2

Introduced new product version in Table 9

Updated ordering information in Table 10