Technical specifications for the SHT45 identify it as a 4th-generation CMOSens® digital sensor. Aggregated specification data lists a humidity accuracy tolerance of ±1.0% RH and a temperature accuracy of ±0.1°C. The hardware operates within a voltage range of 1.08V to 3.6V, featuring an integrated heater designed for self-de-humidification in condensing environments. Communication is established via a fully calibrated I2C digital output.
The NIST-traceable calibration reduces the uncertainty budget for laboratory-grade applications. Schematic analysis confirms the presence of 10kΩ pull-up resistors on the breakout PCB. As a bare module, it provides no ingress protection against particulate matter or direct liquid contact, necessitating an appropriate enclosure for varied environmental deployment.
For users who require multi-sensor environmental data including VOCs and pressure, the WatangTech BME680 is a suitable alternative with a broader detection range.
This module is a high-precision instrument within the environmental data acquisition class.
