Web Sensor P8510 - Remote Thermometer


Comet System


Digital temperature recorder with integrated temperature probe, ethernet connection and administrative web console.
Automatically send the logs or alarms by email, exporting the data in CSV format.
This device covers a range of -30 to 80 ° C and allows to store up to 1000 records.
Includes Adapter A1825 ac/dc 230V-50Hz/5Vdc

169,00 €

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The Sensor measures: Temperature
Power Supply: Ac/dc Adapter 230V-50Hz inc.
Internal tempearture sensor
Web Sensor is designed for measuring temperature from internal sensor. Temperature can be displayed in degree of Celsius or degree of Fahrenheit.
Ethernet interface
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

Actual measured values are accessible via powerful embedded web server. Web pages are ready for access from mobile devices like smartphones and tablets. Web Sensor configuration via web pages is possible too. Web Sensor allows to user customize the design of web pages.
History values memory
Measured values are stored into history memory according selected time interval. Capacity of the memory is 1000 records. Values inside history memory are not backuped. Memory is cleared after device restart.
History graphs
Graphs with history values are accessible via web pages. Modern HTML5 canvas graphic component allows to use graphs from thousands of devices. It is not problem show graphs on tablets or smartphones. All modern web browsers are supported - Firefox, Opera, Chrome or Internet Explorer 9.
History export to 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. CSV file can be downloaded from web pages or periodically send as email attachment.
Alarm events from temperature and humidity channels are stored into eventlog. This log can be viewed on webpages or stored into CSV file. Capacity of this log file is 100 events. Values inside eventlog are not backuped. Log is cleared after device restart.
Warning email are sent when measured value exceed selected limits. Emails are also send when values returns back into safe range. SMTP authentication is supported, but SSL not. Domain name for SMTP server address is supported. Emails with CSV file attachment can be sent at selected intervals.
ModbusTCP protocol
Modbus protocol for communication with SCADA systems or third party software. Web Sensor uses Modbus TCP protocol version. Two Modbus clients can be connected to device at one moment.
Actual values via XML
XML protocol for actual measured values reading. This protocol is suitable for device integration into 3rd party SCADA systems.
SNMP protocol
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.
SNMP Trap for IT infrastructure. Web Sensor allows sending Traps to selected Trap receiver server. Traps are sent in case of alarm or at error states like unable to send email, unable to deliver SOAP message, etc.
SOAP protocol
Web Sensor 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 protocol for IT infrastructure monitoring systems. Web Sensors allow sending text message to selected Syslog server. Messages are sent in case of alarm or at error states like unable to send email, unable to deliver SOAP message, etc.
SNTP protocol - time synchronization
Time synchronisation with SNTP server. Actual time is shown at web pages and is necessary for timestamps inside CSV files. Synchronisation interval can be set to one day or to one hour.
MIN/MAX memory
Memory for minimum and maximum values. Memory is independent on values in history memory. Minimum and maximum values can be cleared according user requirements.


Comet Database

Advanced software for data acquisition and analysis. A powerful solution very easy to use, recommended for the entire range of Comet Transmitters and Regulators (not included)

T-Sensor Software

Free configuration utility for the entire range of Comet Transmitters and Regulators

SensorReader software

Simple tool for data acquisition for the entire range of Comet Transmitters and Regulators. Download it free from our website once the order has been placed

Custom software

If you need more specific software you can always consult us, we have a programming team prepared to develop the tool that suits your business, whether for fixed or mobile devices
The main applications of this device

Server room monitoring

Temperature control of server rooms and rack units, SNMP monitoring, remote alarm by email and Syslog.

HVAC building management

Building temperature control, remote alarm by email or SMS and stored records thanks to the Comet Database Software (not included).


Temperature monitoring of stored products, remote alarm by email or SMS and stored records thanks to the Comet Database Software (not included).

Museums, archives and galleries

Temperature control of rooms where old documents are exposed or stored, remote alarm by email or SMS and stored records thanks to the Comet Database Software (not included).

Factories and manufacturing processes

Temperature control for food processing industry, pharmaceutical industry, aerospace industry, etc.

Home automation

Monitor a residential room, check the historical records of a registrar thanks to the free application SensorReader, remote alarm by email

Air-conditioned rooms

Rising temperature indicates cooling failure, remote alarm by email

The product includes:

• P8510 Web Sensor
• Quick start manual
• Traceable calibration certificate
• Telephone technical support for the installation
• Adapter A1825 ac/dc 230V-50Hz/5Vdc for thermometers P8510, P8511, P8541

Technical parametersValue
Output Ethernet
Measured Value Temperature
Construction Type Ambient Air
Design Industrial
Temperature Measuring Range -30 to 80 °C
Relay Output No
Two-State Input No
Lcd Display No
PoE No
Accuracy of temperature measurement ±0.8°C over -10°C, ±2°C below -10°C
Resolution 0.1°C
Measuring interval 2s
Supported units degrees Celsius, degrees Fahrenheit
Temperature operating range -30 to +80°C
IP protection IP30
LAN connection RJ-45 connector, 10Base-T or 100Base-TX
Communication protocols WWW, ModbusTCP, SNMPv1, SOAP, XML
Protocols for alarms E-mail, SNMP Trap, Syslog
Configuration T-Sensor, WWW configuration
Power 5 Vdc, max. power consumption 1W
Power connector co-axial, diameter 5.5 x 2.1 mm
Dimensions 88.5 x 126 x 39.5 mm (W x H x D), stem length 53 mm
Weight approximately 130g
Warranty 2 years

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