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Multiloggers Transmitters
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Recorder with Printer

H0530 - thermometer with Ethernet interface and relays

code: H0530
Ambient temperature Ethernet sensor with two relay outputs.

Sensor H0530 is designed for online monitoring of temperature. Three binary inputs to detection of two-states signals are the advantage. Other devices are controlled by two relay outputs.

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  • Server rooms monitoring
    Temperature and binary inputs monitoring of the server rooms and rack units, SNMP monitoring, alert by email and Syslog

  • Building HVAC management
    Temperature monitoring of buildings, history data to Comet Database, alert by email or SMS

  • Warehouses
    Temperature monitoring of storage, history data to Comet Database or 3rd party SCADA system

  • Museums, archives, galleries
    Temperature is requested for rooms where old valuable documents are stored, history data to Comet Database, alert by email or SMS

  • Factories and manufacturing
    Temperature monitoring for food processing industry, pharmaceutical industry, aerospace industry, etc.

  • Air-conditioned rooms
    Temperature rising indicates cooling fault, alert by email

P8541 demo


Temperature  Relay BIN Inputs LCD Acoustic Ethernet
WWW Email CSV Modbus SNMP Trap

Online Ethernet Monitoring system


  • Comet Database
    Complex solution for data acquisition and analysing. Easy to use and high flexible database software for Comet Sensors.

  • T-Sensor software
    Free configuration utility for COMET sensor.



Temperature   Sensor is designed to measuring from internal temperature sensor. High precision capacitive polymer sensor ensures excellent calibration long term stability, inertia against water and condensation. Web Sensor is designed for use in non-aggressive environment. Degrees Celsius and Fahrenheit are user selectable.
Releay outputs
Relay Two relay output for alarming or external device control. It is possible to assign any input value to each relay. Relay can be remotely controlled using ModbusTCP communication protocol.
Binary inputs
BIN Inputs It is possible to read three binary inputs status for detection of two-state events - e.g. smoke, water leak detectors, door contact. Supported binary inputs: dry contact, open collector or two-state voltage signal.
Dual line LCD
LCD Large dual line LCD for simultaneous display of temperature. Displayed values are user selectable. Display can be switched off.
Acoustic alarms
Acoustic Acoustic signalisation can be activated after exceeding set limits. Alarm can be confirmed (deactivated) from device keyboard.
Ethernet interface
Ethernet 10Base-T/100Base-TX Ethernet interface via standard RJ45 connector. IP address can be obtain automatically from DHCP server or set manually. Internet protocol version 4 is supported only.
WWW server
WWW Current values are available via embedded web server. Design of the web pages is can be changed according user requirements.
Email Warning email are sent when measured value exceed selected limits. SMTP authentication is supported, but SSL not.
History export to CSV
CSV History values can be exported for next processing by the CSV file. CSV file can be processed inside spreadsheet application like Microsoft Excel or OpenOffice Calc. Two formats of CSV file are supported - dot and comma decimal point separators. Timestamps inside CSV file are shown when device time is synchronised by the SNTP server.
ModbusTCP protocol
Modbus Modbus protocol for communication with SCADA systems or third party software. Device use Modbus TCP protocol version.
SNMP protocol
SNMP SNMP version 1 protocol for IT infrastructure. Using SNMP protocol you can read actual measured values, alarm status and alarm parameters. Via SNMP protocol is also possible to get last 1000 measured values from history table. MIB tables with OID description are available.
Trap SNMP Trap for IT infrastructure. The device allows sending Traps to selected Trap receiver server. Traps are sent in case of alarm on channel or at error states.
SOAP protocol
SOAP The device allows to send currently measured values via SOAP v1.1 protocol. The device sends values in XML format to the web server. The advantage of this protocol is that communication is initialized by the device side. Due to it is not necessary use port forwarding.
Syslog protocol
Syslog Syslog protocol for IT infrastructure monitoring systems. The device allows sending text message to selected Syslog server. Messages are sent in case of alarm on channel or at error states.
SNTP protocol - time synchronization
SNTP Time synchronisation with SNTP server. Actual time is shown at web pages and is necessary for timestamps inside CSV files.


Technical Data

Technical parameters Value
Output Ethernet
Measured Value Temperature
Construction Type Ambient Air
Design Industrial
Temperature Measuring Range -30 to 80 °C
Relay Output Yes
Two-State Input Yes
Lcd Display Yes
PoE No
Accuracy of temperature output ±0.4°C
Resolution 0.1°C
Measuring interval 2s
Available temperature units degrees Celsius, degrees Fahrenheit
Temperature operating range -30 to +80°C
IP protection IP40
Number of relay outputs 2
Maximum switching voltage, current and power of the relay output 50V, 2A, 60VA
Number of binary inputs 3
Signal for binary inputs dry contact, open collector or two-state voltage signal.
Inputs are not galvanically isolated.
Minimum pulse length at binary input 500ms
Low voltage level at binary input 0 to +0.5V
High voltage level at binary input +3.0 to +30V
Audible alarm built-in beeper - switchable
LAN connection RJ-45 connector, 10Base-T or 100Base-TX
Communication protocols WWW, ModbusTCP, SNMPv1, SOAP, XML
Alarm protocols E-mail (SMTP authentication is supported), SNMP Trap, Syslog
Configuration WWW interface, T-Sensor
Temperature operating range of LCD display readable to operating temperature +70°C, it is recommended to switch OFF the LCD over +70°C
Power 9 to 30Vdc, maximum consumption 1W
Power connector co-axial, diameter 5.5 x 2.1mm
Dimensions 136 x 191 x 45mm (W x H x D), stem length 53mm
Weight approximately 340g
Warranty 3 years
Comet Database Comet Database
code: CDB
System for collecting, alarming and analysing of measured data from all COMET devices.
Database Viewer for Comet Database Database Viewer for Comet Database
code: DBV
Low cost browser Database Viewer enables several clients to view database from different places on network/internet.
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Multilogger can be installed permanently to Ethernet network or work as portable device.
Included is traceable calibration certificate in accordance with EN ISO/IEC17025.