The arre Temperature Sensor, with Matter & Thread support, monitors temperature, humidity, ... it’s really tiny and can fit almost anywhere. I have it on a bookshelf, and it’s barely noticeable.

The XTP series of temperature transmitter probes from AutomationDirect combines a precision RTD sensing element and transmitter electronics in a single stainless steel temperature transmitter probe.

Cao Gadgets is attempting to fill that niche with its functionally named Wireless Sensor Tags -- small devices which monitor movement and temperature, notifying you if anything's amiss.

Monitor temperature, humidity, and air pressure in every room with the Aqara Temperature Sensor. Optimize comfort, prevent damage, and automate your HomeKit smart home.

The ML4114 is a temperature humidity meter that features a discreet design, and hence it is often used for IMC’s heritage customers. ... External Temperature Transmitter - NL300. Hanwell EMS for Data ...