EM01b remote temp, humidity, bundled with flood detection feature

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Key Features
  • Low Cost
  • Works out of the box
  • Attaches to a standard 10/100 Mbps Ethernet port
  • Embedded web server
  • Uses Ethernet port
  • Sensors for temperature, RH and illumination
  • Optional ESBus for external sensors flood monitor
  • Programmable email/text alerts - 24/7 monitoring

The EM01b-FLD is a bundled solution great for remotely monitoring temperature, humidity, light and flood detection. Perfect in any building with a local area network connection (CAT5/6). The EM01b-FLD is a sensible solution for any server or comms room, especially if using NAGIOSĀ®. You can also add up to 5 extra flood sensors to this solution via the EM01 hub.

The EM01b family is the perfect solution for server rooms as it is straight forward to use. All you need to do is connect power and connect to your network using the PSU and cables provided. Once that's done you're able to access the monitor and view temperature, humidity and light information. For the more advanced administrators the EM01b can be easily intergrated 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.

Save £84.09 when purchasing this bundle version which includes one ES11 Flood Sensor also order with the ES-Hub and add upto 5 other flood sensors or LCD displays.


  • 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.

The Websensor is an environmental monitoring device designed for remotely monitoring of temperature, light and humidity in datacentres, 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.

Product supplied with:

  • ES11 - Flood Sensor (32265)
  • ES-Bus Cable (32267)
  • EM01b Door Contact Connector (31960)
  • Crossover Cable 1m (29285)
  • Cat 5 Patch Cable 1m (29286)
  • Power Supply 12V (2.1mm pin) (34233)


  • Temperature range: -40 deg C to +60 deg C +/- 0.2 degC
  • Illumination range: 0 to 1000 LUX
  • Relative humidity range: 5 to 95% +/-3%
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