X300 - Ethernet Temperature Module with Thermostat, Web Server and email

X300 - Ethernet Temperature Module with Thermostat, Web Server and email
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Our Price:  £149.00(£178.80 Inc. VAT)

Digital Outputs:  3
Temperature Inputs:  8


2 in stock, immediate despatch  

2 in stock, immediate despatch

The ControlbyWeb X-300™ is two products in one. First, the X-300™ is a powerful web-based temperature logging instrument that allows you to monitor and control temperatures via an IP network. Up to 8 temperature sensors can be connected at a time, and temperatures can be viewed in real-time using a web browser. Second, the X-300™ is a 7-day programmable web-enabled thermostat. Users can adjust and set temperatures for heating and cooling systems and view temperatures from any web browser. Also supports Modbus TCP, SNMP, email alerts, relay control, and a  BASIC interpreter.

Special Offer:  Discounts of 7%, 10%, 12.5% and 15% are available when you order 10, 25, 50 and 100 items or more of this product.

Web-Enabled Temperature Logger
  • The temperature logger can receive data from up to 8 sensors (Temperature and/or Humidity)
  • Supports BASIC scripts for advanced configuration

Web-Enabled Thermostat:

  • Attractive thermostat user interface
  • Connect up to 3 sensors (Indoor, Outdoor, and Humidity)
  • 7 day programming schedule
  • Connect to single stage heating/cooling system


  • Web-browser based - no software required
  • Email alerts (does not support SSL email servers)
  • Three, 5-Amp relays
  • Built-In real-time clock w/ capacitor backup
  • Supports HTTP, TCP, SNMP, Modbus/TCP
  • Supports additional data logging and management from web services
  • Internal temperature and voltage monitoring for diagnostics
  • Rugged DIN-Rail/wall-mountable enclosure.
  • Removable 14-Terminal connector.
  • Input Voltage: 9 - 28 VDC, current: 290mA Max

X-300™ has two operating modes that can be configured in the field, Temperature Monitor and Thermostat modes.

Temperature Monitor 

The X-300™ can be used as a simple web-enabled thermometer for conveniently viewing temperatures on a computer or web-enabled mobile phone. This is useful for viewing the temperatures of living spaces, outdoors, refrigeration systems, tanks, or pipes

Temperatures can be configured to log data to internal memory on a scheduled or event-driven trigger.  Email alerts (or indirectly, text messages) can be sent directly by X-300TM when programmable temperature thresholds are crossed. X-300™ can communicate directly with a custom computer application which can read the temperature data from the X-300™ for process control or other functionality using Modbus TCP or SNMP. High or low alarms can be set to activate email, the built-in relays or remote relays over the LAN (using another Controlbyweb relay device).

Thermostat mode

X-300™ can be used as a thermostat to control HVAC (Heating, Ventilation, and Air Conditioning)  systems. The web browser interface allows users to access the thermostat from anywhere in the building or over the Internet. This is also limits access to only authorized users.

The thermostat Control Page (web page) looks like a professional grade thermostat and includes: indoor temperature, set temperature, outdoor temperature (if connected), high and low outdoor  temperatures for current and previous days (if connected), current humidity (if connected), and other  basic information. The user can adjust the set temperature from the Control Page.

X-300™ also offers a seven day schedule and logging. Logging enables users to track the run time of  the HVAC system at a given set temperature. Indoor and outdoor temperatures can also be included.  With this information, users can make adjustments to scheduled set temperatures for energy savings.


Temperature Sensors

1-Wire® Digital Thermometer (Dallas Semiconductor part DS18B20)

Temperature Range: -55°C to 125°C

Humidity Sensors

1-Wire® Digital Sensor,  Humidity Range: 0-100% RH.

Relay Outputs

SPDT rated 28 VAC, 24 VDC - Max Current: 5 A

Real-Time Clock

Manual or NTP (Network Time Protocol) setup, NTP Sync Period: Once, Daily, Weekly, On Power-up
Automatic Daylight Savings Adjustment

Capacitor Power Backup

Backup Functions: Retain Real-Time Clock, External Variables, Output State, Backup Duration: 3 days minimum

Nonvolatile Memory:

All user settings are stored in non-volatile memory; Settings will not be lost when power is disconnected. 


Storage: Nonvolatile Flash, Circular Buffer, Log File Size: 512K (min 6,477 logs)
Unlimited data storage possible from Web Monitoring Service


CBW Mobile is a simple, reliable way to remotely access your ControlByWeb™ products from anywhere in the world. This app lets you create customized control panels to manage a single device or seamlessly integrate multiple devices on one page.


Quick Start Guide >>

User Manual >>

MIB file for SNMP Software >>

CBW iPhone/iPad App >>

CBW Android App >>

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