SHT3x

Part: Sensirion SHTxx and STSxx

Type: Humidity and Temperature Sensor Design Guide

Description: This document provides design rules and recommendations for integrating Sensirion SHTxx and STSxx humidity and temperature sensors into housings and PCBs to optimize performance, minimize temperature and humidity deviations, and improve response times.

Operating Conditions:

• Supply voltage: not applicable (design guide)
• Operating temperature: not applicable (design guide)

Absolute Maximum Ratings:

• Max supply voltage: not applicable (design guide)
• Max continuous current: not applicable (design guide)
• Max junction/storage temperature: not applicable (design guide)

Key Specs:

• Not applicable (design guide, no component specifications)

Features:

• Sensor has good access to environment
• Sensor is sealed from air entrapped in housing
• Dead volume enclosed around sensor is small
• Sensor is decoupled from heat sources
• Guidelines for minimizing humidity response time
• Guidelines for minimizing temperature response time
• Recommendations for designs in harsh environments (e.g., IP67 with filter membrane for SHT3x)

Applications:

• General humidity and temperature measurement
• Applications requiring fast response times
• Devices operating in harsh environments (dust, water)
• Integration into systems with airflow (e.g., tubes)

Package:

To achieve a good thermal coupling between the sensor and the environment the sensor should be placed as close to the environment as possible - best at a corner or at least at the edge of the device. An airstream of ambient air will additionally increase the coupling.