Sensirion SHT40-AD1B-R2
Digital RH & Temperature Sensor
A high-accuracy digital sensor platform designed for precise relative humidity and temperature measurements. Built in a compact 4-pin DFN package, it features ultra-low power consumption, high precision, and an integrated variable power heater for reliable operation in condensing environments.
RH Accuracy
±1.8% RH
±1.8% RH
Temp Accuracy
±0.1°C
±0.1°C
Supply Voltage
1.08V – 3.6V
1.08V – 3.6V
Idle Current
80 nA
80 nA
Interface
I²C Fast Mode+
I²C Fast Mode+
Package / Case
DFN-4 (SMD/SMT)
DFN-4 (SMD/SMT)
Key Features
- Operating Range: 0 to 100 %RH, -40°C to +125°C
- Condensing Operation: Fully functional in harsh, high-humidity environments
- Integrated Heater: Power-trimmed internal heater with 3 heating levels
- Traceability & Data: NIST traceability with CRC checksum validation






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