COMET H0530 – WebSensor with Internal Temperature Sensor, 2 Relay Outputs

COMET H0530 – Ethernet Sensor with Internal Temperature Sensor –30 to +80 °C, 2 Relay Outputs 

The COMET H0530 is a compact Ethernet sensor with an integrated temperature sensor and two relay outputs, providing the ideal solution for precise temperature monitoring and direct control in buildings, server rooms, warehouses, technical rooms, greenhouses, or production facilities. As a true remote thermometer with relay functionality, it is perfect for building automation, climate control, quality assurance, or process monitoring where temperature needs to be actively regulated.

The internal sensor measures temperature from –30 to +80 °C with an accuracy of ±0.4 °C and high resolution (0.1 °C). The two relay outputs (max. 50 V / 2 A / 60 VA) can be freely programmed by temperature thresholds, ideal for direct control of heaters, coolers, valves, signal lights, or emergency shutdowns. In addition, the H0530 features three binary inputs for status detection (door contacts, motion sensors, switches, etc.). An adjustable acoustic alarm (buzzer) warns in case of limit exceedance.

The large dual-line LCD displays current readings and relay status. Via Ethernet (RJ45), the sensor integrates seamlessly into networks and can be directly connected to the COMET Cloud (3 months free, then 1 credit/year) for graphs, exports, alarms, and remote access via app or browser. Alternatively, it supports Modbus TCP, SNMP, JSON, or XML for integration with your own SCADA/BAS/IoT solution. Optionally, it can be powered via PoE – one cable for both data and power.

The robust housing and the operating temperature range of –30 to +80 °C make the H0530 a reliable partner for continuous use, indoors and outdoors. The sensor is maintenance-free, long-term stable, and the first choice for intelligent temperature control without an external probe.

Why the COMET H0530 is the professional temperature sensor with relays:

• Integrated temperature sensor –30 to +80 °C, ±0.4 °C
• 2 relay outputs – 50 V / 2 A – for direct control
• 3 binary inputs – for status reporting
• Ethernet interface – direct network connection
• COMET Cloud ready – 3 months free, then affordable
• Modbus TCP, SNMP, JSON, XML – open for third-party systems
• Large dual-line LCD – shows values + relay status
• Adjustable acoustic alarm – additional warning
• Remote alarm function – email, SNMP trap, syslog
• Optional PoE – power + data over one cable

Technical data H0530:

• Temperature range: –30 to +80 °C (±0.4 °C)
• Resolution: 0.1 °C
• Relays: 2 × max. 50 V / 2 A / 60 VA
• Binary inputs: 3 × (dry contact, open collector, or voltage signal)
• Interface: Ethernet (RJ45)
• Cloud: COMET Cloud (3 months free)
• Protocols: WWW, Modbus TCP, SNMPv1, SOAP, XML
• Alarm protocols: Email, SNMP trap, Syslog
• Power supply: 9–30 V DC (PoE optional)
• Operating temperature: –30 to +80 °C
• Protection class: IP30
• Warranty: 3 years

Perfect for:

• Building automation & BAS systems
• Data centers & server rooms
• Storage & production areas
• Technical & heating rooms
• Greenhouses & climate chambers
• Temperature-dependent switching & alarms
• Integration into existing networks
• Installations with PoE (optional)

Installation & commissioning – done in minutes

Mount the device, connect network cable and power, wire the relays – done! The integrated web interface guides you through setup and relay programming. Online in seconds with COMET Cloud – no server effort required.

Summary:

• Ambient temperature sensor with Ethernet and two relay outputs
• The H0530 sensor is used for online temperature monitoring
• Three binary inputs allow detection of two-state signals
• Additional devices can be controlled via the two relay outputs

Scope of delivery:

• H0530
• User manual
• Traceable calibration certificate
• Free TSensor software for transmitter configuration
• COMET Cloud for 3 months
• Power supply not included