EM01b remote temp, humidity, light and door contact monitor bundled with the ES11 flood detection monitor


  • Low Cost
  • ES11 flood / leak detection module bundled with EM01b
  • Up to 5 additional ES11 modules can be used with each EM01b
  • Embedded web server
  • Uses Ethernet port
  • Sensors for temperature, RH and illumination
  • Optional ESBus for external sensors (flood monitoring etc)
  • Programmable email/text alerts - means 24/7 monitoring
Code: 32264
10 in Stock
1+ 5+ 10+ 25+
£279.41 £242.55 £207.90 £184.80
Prices Exclude VAT

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 NAGIOS®. You can also add up to 5 extra flood sensors to this solution via the EM01 hub.

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.

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.

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.


  • 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.

Optional extras for the EM01b are shown below, ES11 leak and flood detector, ES hub to connect up to 6 devices to the EM01b, ES01 display unit and the ES connection cable. All of these are available as extras from stock.

EM01b-FLD Images

  • EM01b-FLD close up

EM01b-FLD Specifications


  • 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%
  • Leak detection of ES11 - programmable
  • ES11 connected by ES cable (supplied) and can be any distance from the EM01b


  • Plug for you door contact system
    • EM01b Door Contact Connector
      Stock: 0
  • ES-Bus Cable for connecting ES01 LCD displays and ES11 flood sensorss to an ES-Hub which then connects to the EM01b using a standard ethernet cable.
    • ES-Bus Cable
      Stock: 0
  • Connect extra flood sensors and LCD display to the EM01b
    • Hub for EM01b
    • Connects to EM01b family of flood sensors (up to 6)
    • Connects to ES01 display
    • ES-Hub
      Stock: 0
      1+ 5+ 10+ 25+
      £33.59 £32.08 £29.01 £27.31
  • LCD display for the EM01b. The ES01 displays the temp, humidity and light conditions being sensed by the EM01b
    • ES01 - LCD Display
      Stock: 0
      1+ 5+ 10+ 25+
      £104.16 £80.85 £68.15 £46.20
  • Flood Sensor for use with the EM01b Websensor
    • Used with EM01b-STN to add water leak, Flood sensing capability
    • Can be calibrated to detect amount of desired moisture
    • ES11 - Flood Sensor
      Stock: 0
      1+ 5+ 10+ 25+
      £130.64 £127.05 £113.19 £80.85
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