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2.4 Recommended Operating Conditions

The sensor shows best performance when operated within the recommended normal temperature and

humidity range of 5 °C … 60 °C and 20 %RH … 80 %RH, respectively. Long term exposure to conditions outside

recommended normal range, especially at high relative humidity, may temporarily offset the RH signal (e.g.,

+3 %RH after 60 h at >80 %RH). After returning into the recommended temperature and humidity range the

sensor will recover to within specifications by itself. Prolonged exposure to extreme conditions may accelerate

ageing.

The Sensors from Sensirion’s SHT4x Family show exceptional resistance to volatile organic compounds and

ageing. To avoid contamination the conditions described in the document “Sensirion, Handling Instructions

for Humidity Sensors, 2020 [1]” must be met. Please note as well that this does apply not only to transportation

and manufacturing, but also to operation of the SHT4xA.

2.5 Design In

The above-mentioned specifications hold for the stand-alone sensing element. To achieve the best

performance please consult the document Design in Guide [2] on our website Sensirion.com.

3

Functional Safety Documentation

SHT41A-AWSB is accompanied by functional safety documentation for use in safety-critical applications (see

Table 3)

Document Name

Descsription

Access

Functional Safety Base Failure rate

Base FIT rates calculations

Link

Diagnostic Manual

Guidelines for utilizing standard

application commands for diagnostics

and failure detection

Contact Sales

Safety Manual

Safety goals definition and requirements

definition for use in SEooC ASIL-A

functional safety applications

Contact Sales

Table 3. SHT41A-AWSB available Functional Safety Documentation.