Sensirion

Sensirion is the dominant supplier of digital humidity and environmental sensing, and the profiles here cover its core families: the SHT30 and SHT31 humidity and temperature sensors with calibrated digital I2C output, the compact SHT40 for space-constrained designs, the SGP40 VOC gas sensor for indoor air quality monitoring, and the SCD41 NDIR CO2 sensor. These are high-reorder parts in HVAC, air quality monitors and consumer devices — which also makes them frequent counterfeit targets, so confirm traceability documents with every offer. Sensirion ordering codes encode the interface, accuracy grade and packing (tape-and-reel quantities like 2.5KS), so quote the complete part number and confirm the exact variant before RFQ.

Sourcing notes for Sensirion parts. Always quote the complete manufacturer ordering code — package, temperature grade, speed or accuracy grade, and packing (reel, tube or tray) all change availability and price, and suffixes are where most mismatches happen. Check the lifecycle status on the manufacturer site before committing to a multi-year build; parts flagged not-recommended or obsolete need a last-time-buy plan or a verified alternate lined up early. With every offer, request traceability documents — date code, lot code and original packing — and confirm the inspection steps your supplier applies to high-risk lots.