Sensirion SHT45 Humidity Sensor (SHT45-AD1B-R2)

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Revision as of 09:04, 23 October 2026 by 7yuta (talk | contribs) (- A high-precision passive digital humidity and temperature sensor with I2C interface, widely used in industrial IoT and HVAC systems. As a component-level device, it has no independent processing, storage or security features; all security properties are determined by the upstream host controller.)

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Sensirion SHT45 Humidity Sensor (SHT45-AD1B-R2)
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Sensirion SHT45 Humidity Sensor (SHT45-AD1B-R2)
   Brand: Sensirion (Parent: Sensirion Holding AG)

   Category: Industrial IoT Humidity & Temperature Sensor • Model / Gen: 4th Generation (SHT4x series) SHT45-AD1B-R2

   Release Date: 2020-10-25 • Status: In sale

   Classification Date:  • Official Website

Security Evaluation

1. Device Security

Criterion Value Proof Comment
Known hardware tampering None 🔗 Proof Passive sensor component with no processing or storage capabilities; no tampering target.
Known vulnerabilities None 🔗 Proof No CVE vulnerabilities exist for this component-level sensor.
Prior attacks None 🔗 Proof Sensor itself cannot be attacked directly; security depends entirely on host controller.
Updatability None 🔗 Proof No firmware; fixed-function analog sensor with no update capability.
Category Score Score: 2 / 3

2. System Security

Criterion Value Proof Comment
Authentication with other systems No 🔗 Proof No built-in authentication; all security handled by upstream host controller.
Communications No encryption 🔗 Proof I2C bus communication is unencrypted by design; encryption implemented at host level.
Storage No encryption 🔗 Proof No on-board data storage; sensor readings held in host memory.
Category Score Score: 3 / 3

3. User Authentication

Criterion Value Proof Comment
Account management Absent 🔗 Proof No user accounts at sensor level; access control managed by host system.
Authentication Absent 🔗 Proof No native authentication mechanism; fully dependent on host controller.
Brute-force protection Absent 🔗 Proof Not applicable for passive sensor component.
Event logging Absent 🔗 Proof No on-board logging; data logging handled by host system.
Passwords Default/Common/Easy to guess 🔗 Proof No device-level passwords; I2C bus has no native authentication.
Category Score Score: 3 / 3

Technical Specifications

Property Details
Operating System & App No OS (hardware peripheral) (Companion App: N/A (host system dependent))
Hardware (CPU / GPU) CPU: No on-board processor (passive sensor) • GPU: None
Memory & Storage Memory: No on-board memory • Storage: No on-board storage
Power, Battery & Charging Battery: None (bus-powered) • Power: 1.08V – 3.6V DC, I2C bus powered • Charging: N/A
Display & Camera Display: None • Camera: None
Sound & Connectivity Sound: None • Connectivity: I2C digital interface
Physical (Dimensions & Mass) Dimensions: 0.25 × 0.25 × 0.09 cm • Mass: 0.001 kg


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