Ethernet sensor for 4 temperature and humidity probes with PoE Comet PA8641

Comet PA8641 – Temperature and Humidity Monitoring in Up to 4 Locations Simultaneously

Do you need to monitor temperature or humidity at multiple points at the same time? The Comet PA8641 is a professional Ethernet monitoring unit that allows connection of up to four external digital temperature or temperature and humidity probes. This enables you to monitor several locations within a server room, warehouse, cold storage facility, production hall, or technical room using a single device.

The device communicates via an Ethernet network and supports PoE (Power over Ethernet). In many installations, a single network cable is all that is required, significantly simplifying deployment and reducing installation costs.

The Ideal Solution for Multi-Point Monitoring

Unlike standard thermometers that measure only a single location, the PA8641 can monitor up to four independent measurement points simultaneously. Each probe can be installed up to 30 meters away from the unit, making it possible to monitor different warehouse zones, multiple server racks, or several refrigeration units with a single monitoring device.

Typical Applications

• Warehouse temperature monitoring

• Server room and IT rack monitoring

• Temperature monitoring in cold storage and freezer rooms

• Technical and utility rooms

• Laboratories

• Industrial production facilities

• Pharmaceutical and healthcare applications

Access Your Data from Anywhere

Measured values can be viewed through the integrated web interface or via the COMET Cloud platform. This provides facility managers and administrators with immediate access to current conditions without the need for on-site inspections. The system also supports automatic alarms and remote monitoring.

Designed for Professional Systems

The PA8641 is designed for integration into modern monitoring and Building Management Systems (BMS). It supports industry-standard communication protocols including Modbus TCP and SNMP, as well as secure communication through HTTPS, TLS, and SNMPv3. With support for both IPv4 and IPv6, it is fully prepared for deployment in modern enterprise networks.

Easy Installation and Low Operating Costs

PoE support enables installation without a separate power adapter. External probes can be easily replaced, and the device automatically detects compatible probes, simplifying maintenance and routine calibration.

Key Benefits

• Monitor up to 4 measurement points with a single device

• Supports both temperature and temperature/humidity probes

• Probe cable length up to 30 meters

• Ethernet connectivity

• IEEE 802.3af PoE power supply

• Online monitoring through a web interface

• COMET Cloud support

• Email alarms and remote supervision

• Modbus TCP and SNMP integration for BMS systems

• Secure HTTPS and TLS communication

• Backup internal measurement memory

• 3-year manufacturer warranty