EM01b remote temp, humidity, light and optional door contact monitor bundled with an ES01 LCD display and ES11 Flood sensor



  • Low Cost
  • Works out of the box
  • Attaches to a standard 10/100 Mbps Ethernet port
  • Embedded web server requires - no proprietary software
  • Uses Ethernet port - communications via standard IT components
  • Sensors for temperature, RH and illumination - already built in
  • Optional ESBus for external sensors (flood monitoring etc)

Click to view

Parts Images Specifications Downloads

The EM01b-PRO is a bundled solution great for remotely monitoring temperature, humidity, light and flood detection whilst displaying all the enviromental information on a local LCD display. Perfect in any building with a local area network connection (CAT5/6). The EM01b-PROis a sensible solution for any server or comms room, especially if using NAGIOS®. You can also add up to 4 extra ES11 flood sensors or additional ES01 LCDs to this solution via the EM01b hub.

This bundle version includes the ES11 flood sensor, ES01 LCD display and EShub to connect both the ES01 and ES11 to the same EM01b. The ES01 allows you to see the environmental information without a PC. and makes the EM01b-PRO a standalone system if required as well as an ethernet connected remote monitor

Perfect solution for server rooms as it's straight forward to use, all you need to do is connect power and LAN connection to your network. Once that's done you're able to access the EM01b monitor and view temperature, humidity, light and flood detection information. For the more advanced administrators the EM01b can be easily integrated with NAGIOS: which is a popular open source computer system and network monitoring software application. It watches, hosts and services the connected monitors, alerting users when things go wrong and again when they get better Click here for an overview of NAGIOS®.

The EM01b is a powerful websensor for Server Rooms, Warehouses and is being used extensively in the HVVAC (heating, ventilation, and air conditioning) Industry.


  • Detects contact closure (used to detect door opening) (Standard
  • External voltage measuring (0 to 18 VDC) see EM01bVM
  • External thermistor interface and additional temperature sensing see EM01bTherm.

HVAC Monitor, remote temperature and data logging with the Websensor system using a built in IP address.

The Websensor is an environmental monitoring device designed for remotely monitoring of temperature, light and humidity in data centers, server rooms - or any space that relies upon a steady and predictable environment and has access to the Internet. The Websensor series are sensors with built-in signal conditioning and a web address. Users are able to access the sensor directly via PC and remotely monitor the data which can be viewed at any time through a web-browser and receive alarms via text or email.

The Websensor EM01B connects directly to your Ethernet network via a 10/100 Mbps switch or hub port. It provides monitoring for temperature, illumination (light level) and relative humidity and is ideal for monitoring environmental conditions in server rooms and wiring closets. It is capable of measuring DC voltages, which allows you to check battery supply voltages of UPS units or renewable energy sources. The new thermistor interface allows you to interface external special use sensors, such as liquid temperature measurement and the new contact closure detection allows you to detect door open conditions (for security purposes) or configure equipment start-up and shut-down conditions.

The EM01B has an ESbus enabling other external sensors to connect to the web for remote monitoring. Each EM01B with its ESbus is capable of handling up to six additional ESbus enabled sensors. The EM01B is supplied complete with manuals, software for set up and cables. At time of ordering the customer must specify what additional function is required of those available: i.e. door contact, DC voltage, thermistor interface.


All alerts are operated by Nagios. The plugins are available within the downloads section of this page.


For stock availability please call +44 1189 769 014 before placing an order Distributors




Downloads & Software

You might be interested in...

Want to find out more information?

Email us at or click on the link below