Legionnaires’ disease – the importance of properly monitoring water

Understanding Legionnaires’ disease and the risks associated with it

If you are an employer, or someone in control of premises, including landlords, you must understand the health risks associated with legionella. Duties under the Health and Safety at Work etc Act 1974 (HSWA) extend to risks from legionella bacteria, which may arise from work activities. The Management of Health and Safety at Work Regulations (MHSWR) provide a broad framework for controlling health and safety at work.

More specifically, the Control of Substances Hazardous to Health Regulations 2002 (COSHH) provide a framework of actions designed to assess, prevent or control the risk from bacteria like Legionella and take suitable precautions. The Approved Code of Practice: Legionnaires’ disease: The control of Legionella bacteria in water systems (L8) contains practical guidance on how to manage and control the risks in your system.

As an employer, or a person in control of the premises, YOU are responsible for health and safety and need to take the right precautions to reduce the risks of exposure to legionella. You must understand how to:

  • identify and assess sources of risk
  • manage any risks
  • prevent or control any risks
  • keep and maintain the correct records
  • carry out any other duties you may have

For more information on health and safety with regards to Legionella please visit: www.hse.gov.uk/legionnaires/what-you-must-do.htm


Consequences of incorrectly monitoring potential risks

Neglecting health regulations can have devastating consequences. A notable instance of this was the horrific outbreak of Legionnaires in Scotland 2012, in which four people died and there were 92 cases of Legionnella detected. It was the worst outbreak of Legionnella for 10 years. The source of the infection is believed to have come from cooling towers. More than 40 families have been affected by the Edinburgh disaster, and are now to sue two companies believed to be responsible.


How can instances like this be avoided?

To minimize the risk of legionella water temperature must be properly regulated and monitored. Testo provide a number of instruments to help make sure water temperature is correctly monitored in the hope there are no more Legionella related disasters.


Testo Saveris 2 Wireless Monitoring System

The Wireless Monitoring System, Saveris 2 together with its special pipe probes, provides an effective and reliable solution. Temperature of water pipes can be monitored continuously 24 hours a day, 7 days a week. In the event that the critical temperature range between 20°C and 50°C is exceeded, an alarm can be instantly raised by SMS (optional) or e-mail. The appropriate person will be alerted wherever they happen to be.


Data recorded in Saveris 2 loggers is automatically transmitted to the Testo Cloud by wireless LAN. Data can be called up at any time by any internet enabled device such as a PC, tablet or Smartphone. The rugged Saveris 2-T2 can store up to 2 x 10,000 measurement values and the case is water-proof to IP65.

Features and advantages:

  • Two measurement channels, for hot and cold water pipes
  • Excellent data security thanks to double storage of all measurement values: in the Saveris 2 logger and in the Testo Cloud
  • High reliability and high availability due to two year warranty and two year battery life*
  • Plug & Play set up. No software required, just an internet connection, wireless LAN and normal web browser
  • Automatic Data Transfer as measurement values are automatically transmitted to the Testo Cloud by wireless LAN. No more laborious manual recording of data
  • Supplied with wall bracket and padlock, USB cable and 4 AA batteries.

*Typical value with supplied AlMn AA batteries.


Testo 925 Thermometer Legionella Kit

This kit provides the ideal solution for spot checks of water temperature at outlets throughout your building. Includes immersion / penetration probe, air probe, strap-on probe, carry case, battery and calibration protocol.


The one channel temperature measuring instrument for connection to reliable, fast-action thermocouple probes. An additional temperature probe can be displayed in testo 925; data is transmitted by radio, i.e. wirelessly. An audible alarm sounds if limit values are exceeded. Current measurement data as well as max/min data can be printed on site on the Testo fast printer.

Features and advantages:

  • 1 channel measuring instrument with optional radio probe
  • Wide range of probes
  • Continuous display of max/min values
  • Hold button to freeze reading
  • TopSafe, indestructible case, protects from dirt and impact (option)
  • Display light
  • Special probes for industrial kitchen sector
  • An audible alarm sounds when limit values are exceeded


For more information on Testo’s Legionella solutions or any Testo products please visit our website: www.testolimited.com

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About Testo Limited

We offer an extensive range of instruments for many parameters and applications including; Temperature, Humidity, Velocity, Gas analysis, RPM, Pressure, Light, pH, Sound. testo instruments are widely used in the following sectors: HVAC-R: heating, ventilation, air conditioning and refrigeration. Process Industry: manufacturing industries, service companies and utilities. Food Sector: including food manufacture, transport, storage, distribution and retail. Thermal Imaging: for building surveys, maintenance, electrical inspections and production monitoring.

Posted on August 13, 2015, in Commercial, Data Loggers, Deals, Environmental, Facilities Maintenance, Facilities management, Health and Safety, Home, Humidity, Industry, Latest News, News, Safety and tagged , , , , , , , , , , , , , , , , , . Bookmark the permalink. Leave a comment.

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