Digital Humidity Sensor SHT4x (RH/T)
The 4th Generation of Best-in-Class Humidity Sensing
In line with Sensirion’s industry-proven humidity and temperature sensors, the SHT4x offers the best price-performance ratio on the market. Tape and reel packaging combined with its suitability for standard SMD assembly processes make the SHT4x ideal for high-volume applications.
The SHT4x builds on a completely new and optimized CMOSens® chip that offers reduced power consumption and improved accuracy specifications. With the extended supply voltage range from 1.08 V to 3.6 V, it’s the perfect fit for mobile and battery-driven applications. The exceptionally small size in a robust DFN housing enables integration into challenging designs while meeting the highest reliability demands, as demonstrated by the JEDEC JESD47 qualification.
The high-accuracy versions SHT41 and SHT45 feature typical and maximal accuracies that have been honed even further, down to ∆RH = ± 1% RH and ∆T = ± 0.1°C, making them suitable for the most demanding applications in all industries. The year 2022 will also bring additional protection options to complete the portfolio, meeting even the most rigorous technological challenges. The on-package filter membrane ensures IP67 compliance for exposed designs, while the protection option ensures reliable conformal coating.
| Product | Typ. RH Accuracy (%RH) | Typ. Temperature Accuracy (°C) | VDD Range (V) | Interface | Protective Options | Available Reel Sizes (pcs) | Datasheet | Buy |
|---|---|---|---|---|---|---|---|---|
| SHT40 | ±1.8 (typ.) @30-70% RH ±3.5 (max.) @30-70% RH | ±0.2 (typ.) @0-65°C ±0.4 (max.) @0-65°C | 1.08 V to 3.6 V | I2C | Coming in 2022 | 2'500, 10'000 | Download |  |
| SHT41 | ±1.8 (typ.) @30-70% RH ±2.5 (max.) @0-90% RH | ±0.2 (typ.) @0-65°C ±0.4 (max.) @0-65°C | 1.08 V to 3.6 V | I2C | Coming in 2022 | 2'500, 10'000 | Download | soon available |
| SHT45 | ±1 (typ.) @0-90% RH ±2 (max.) @0-90% RH | ±0.1 (typ.) @5-60°C ±0.2 (max.) @5-60°C | 1.08 V to 3.6 V | I2C | Coming in 2022 | 2'500, 10'000 | Download | soon available |
Features
| Size | 1.5 x 1.5 x 0.5 mm3 |
| Output | I²C |
| Supply voltage range | 1.08 to 3.6 V |
| Energy consumption | 0.4µA (at meas. rate 1 Hz) |
| RH operating range | 0 - 100% RH |
| T operating range | -40 to +125°C (-40 to +257°F) |
| RH response time | 6 sec (tau63%) |
Delivery Conditions
| Packaging | Tape & Reel, sealed in ESD bag |
| Packaging sizes | 2'500 & 10'000 pieces per reel
|
Accuracy Limits for Relative Humidity and Temperature (SHT40)
Accuracy Limits for Relative Humidity and Temperature (SHT41)
Technology and Benefits
| Technology | Benefit |
|---|---|
| Supply voltage: 1.08 V to 3.6 V | Perfectly suited for mobile and battery-driven applications, today and in the future |
| Relative humidity accuracy up to 1.5% RH Temperature accuracy up to ±0.1°C | Unrivalled accuracy tolerances, minimal device-to-device (D2D) variations |
| I2C fast mode plus | Fastest data transfer, minimum bus occupancy |
| Variable power heater | Enabling new applications in extreme operating conditions |
| New MEMS sensor element | Fully functional in a condensing environment, full signal integrity at all times |
| Average current: 0.4 µA (at meas. rate 1 Hz) | Enhancing battery lifetime and ideal for power-conscious devices |
Petition "40to60RH"
Several research papers demonstrate that controlled indoor humidity levels play a crucial role in preventing virus transmission and improving the resilience of the human immune system. The data shows that a relative humidity (RH) level of between 40% and 60% is optimal for minimizing the spread of viruses such as influenza. Scientists are therefore calling on the WHO to revise the global guidelines for indoor air quality.
The significance of indoor humidity is crucial to us. As market leader in humidity sensing, it is important to us to support petition 40to60RH. Improving people’s health is part of our mission and we therefore encourage everyone to support this petition to gain the attention of the World Health Organization.
Support the petition and learn more about it: www.40to60rh.com
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