The SF1 Filter Cap provides IP67 protection against water, dust and other contaminants for the humidity and temperature sensors SHT11 and SHT15. It is a low cost part and very easy to use. The Filter Cap consists of a single piece of polypropylene including a filter membrane. It fits the outer dimensions of the SHT1x sensors and allows for compact system design. It also serves as an adaptor for mounting the sensor directly into the wall of a housing. Using a sealing ring, this results in a waterproof mounting solution.
The SF1 Filter Cap is a single‑piece polypropylene component with a PTFE filter membrane that protects Sensirion SHT11 and SHT15 humidity and temperature sensors against dust and water (IP67). It enables compact system designs and can be used as an adaptor to mount the sensor directly into a housing wall.
The document details application areas such as HVAC, data loggers, and agricultural equipment, and describes three mounting options—including fixed, glued, and heated‑pin methods—as well as waterproof sealing with an O‑ring. Full specifications, dimensions, footprint, ordering information, and safety notices are provided.
| Body material | Polypropylene (PP) |
|---|---|
| Filter material | PTFE with polyester scrim (PP) |
| Temperature range | -40 °C to 100 °C |
| Protection class | IP67 |
| Filtration efficiency | 0.1 µm particles @ 99.99 % |
| Filter pore size | 15 µm |
| Air velocity (test) | 0.05 m/s |
| Oleophobicity rating | 6 (scale 0‑10) |
| Response time (63 % RH) | 30 s |
| Mullen hydrostatic pressure | 70 kPa |
It meets IP67, meaning it is dust‑tight and protected against temporary immersion in water.