Summary of Even the humidity & temperature sensors can be „3G“
The SHT3x series, including the new SHT31, offers high accuracy across extreme humidity ranges (below 10% and above 90%) with ultra-low power consumption. It features precise temperature measurement for dew point calculation and includes an "Alert" pin for threshold notifications. Available in digital I2C or analog versions, the SHT31 provides linearized outputs suitable for HVAC control and direct analog processing.
Parts used in the SHT3x Sensor Project:
- SHT31-DIS-B (Digital Output)
- SHT31-ARP-B (Analog Output)
- SHT30
- SHT35
- SHT1x Series
- SHT2x Series
- Host MCU
Even the actual series like SHT1x and SHT2x belong to a top in this segment. Forthcoming series SHT3x (SHT30, SHT31 and soon also SHT35) addresses mainly those of you, requiring maximum accuracy even in limit values (humidity below 10% and above 90%), miniature dimensions and ultra low power consumption. So a main difference of a new SHT31 compared to SHT21 is, that a typical +-2% is maintained in a whole range. Together with a precise temperature measurement in element we still have a possibility to simply compute a dew point, what´s one of the key parameters for ventilation control (HVAC, heat recovery). If it´s “only” necessary to guide a humidity not to exceed certain level, then you´ll probably also use the output „Alert“ pin, able to start interrupt in a host MCU for instance or directly control further devices. Output of the SHT3x sensor is the linearized value, which can be easily transformed to a final value (%RH, °C).
SHT31 is available in 2 versions – SHT31-DIS-B with a digital output via well-proven I2C bus (2 selectable addresses) and also in a version SHT31-ARP-B with a linearized analogue (proportional) output. That´s why SHT31-ARP-B is an interesting alternative for direct processing in analogue circuits, as it contains 2 independent outputs with output voltage of 10-90% Vdd, responding to 0-100%RH and -45 to +130°C temperature. Digital output version also features wide possibilities of setting regarding measurement frequency, communication speed and other parameters.
Detailed information will provide you SHT3x-ARP and SHT3x-DIS datasheets. Comparison of particular series will provide you the „Sensirion_Humidity” flyer.
In case of interest please contact us at [email protected].
For more Details: Even the humidity & temperature sensors can be „3G“
- What makes the SHT31 different from the SHT21?
The SHT31 maintains typical +-2% accuracy across the entire range unlike previous models. - Can the SHT31 calculate dew point?
Yes, by combining its precise temperature measurement with humidity data. - How does the Alert pin function?
It can start an interrupt in a host MCU or directly control other devices when limits are exceeded. - Does the SHT31 support low power consumption?
Yes, it is designed for ultra low power consumption. - What output options are available for the SHT31?
It comes in a digital I2C version and a linearized analog version. - What voltage range does the analog output use?
The analog version outputs 10-90% Vdd. - Which sensors address maximum accuracy in limit values?
The forthcoming SHT3x series addresses users needing max accuracy below 10% and above 90% humidity.
