Low-Cost Sensor for Up to Four Digital Probes, Ethernet Output and PoE

The Web Sensor PA8641 is a universal Ethernet sensor designed to connect up to four digital temperature probes or combined temperature and humidity probes.

The device uses an independent bus for each channel, allowing a probe cable length of up to 40 m for each input separately. This allows individual probes to be placed more flexibly and at greater distances.

The device is suitable for monitoring multiple points in a single location, such as server rooms, technical rooms, or warehouses. Like other models, it offers a modern web interface, top-tier security including the option to upload custom certificates for HTTPS and TLS communication, and PoE support.

The device supports automatic detection and replacement of the same type of probes, simplifying maintenance and calibration.

Main Benefits:

• Support for external digital temperature and humidity probes on a cable
• Allows probe connection up to 40 meters in length
• Power supply 5–24 V or PoE (IEEE 802.3af)
• Integrated backup memory
• Modern web interface, IPv4/IPv6 support, Modbus TCP, COMET Cloud, and fully encrypted communication (HTTPS, SNMPv3, TLS)
• Integrated detachable bracket for easy installation