Blog Archives

Thermal Imaging for contractors – advantages in a nutshell

For contactors in the Building, Facilities Maintenance, HVAC, and Electrical industries, the ability to visualise each situation you are facing can make a huge difference. Knowing precisely where to start with a job, can save time and effort, meaning you increase efficiency, and ultimately provide a faster service to customers.

Those 20-30 minutes extra spent diagnosing each job soon add up, particularly at busy times of the year when you’ve got a waiting list. With that in mind, a valuable addition to many contractors toolkit is a thermal imaging camera.

But what specific applications is a thermal camera most useful for?

Below we summarise some of the best examples where thermal imaging has time and time again, proved an extremely effective diagnostic tool for contractors:


Heating and installation systems

  • Checking radiators for build-up of silt deposits
  • Identifying underfloor heating abnormalities

0560-8690_testo-869_04 underfloor-heating


Electrical Maintenance

  • Identifying overloads, imminent malfunctions or existing defects in switching cabinets and wiring

testo-872_0560-8721_08 overheating cable


Construction and Mould Assessment

  • Visualising thermal bridges in buildings
  • Detecting areas that are prone to mould

mould-risk-testo-limited testo-865_0560-8650_05


Leak Detection

  • Pinpointing thermal anomalies in leaking pipes
  • Locating roof leaks

testo-868_0560-8681_07 Floor_leak_example


Structural and Insulation Defects

  • Finding insulation defects
  • Checking air tightness of windows and doors

testo-868-871-872-house-with-scaleassist testo-872_0560-8721_07


Like some more information?

For more information on Thermography or any of please go to Alternatively, if you’ve got a requirement you’d like to discuss, you can contact us directly on +44 1420 544433 and we’ll be happy to help.

Testo Logo

Testo UK have a brand new website! Introducing

We’re delighted to announce an all new, innovative website for testo UK – introducing:


With customer convenience and usability at the forefront of the design process, the launch of means our customers will be able to find the perfect solution for their application more easily than ever. Boasting a more extensive list of products, brand new content and a host of new features it’s not something you’ll want to miss!

Here’s some more information on our new site:


Bigger, better and with a range of new features

As mentioned above, the new and improved has an even broader range of products available, plus new, in depth and interesting content for testo equipment enthusiasts. It will act as something of a ‘content-hub’, with up-to-date insights and solutions, specific to your industry. This marks a new level of application specific content for testo UK users.


User friendly for your convenience

The Testo UK website not only looks better, fresher and clearer than before, but thanks to our new ‘Responsive Web Design’ feature it’s also 100% mobile friendly, so will look great on your smartphone or tablet. This means you can catch up with testo anytime, no matter where you happen to be!

During the design, we also vastly improved our search function. Thanks to specific filters, you can now find the product or download you’re looking for even more efficiently. This will help you make right choice, pin-pointing the instrument which is best suited to your requirements.


What will happen to

Our current site will continue to run alongside our new site, becoming the ‘Testo UK Shop’. This means you will still be able to purchase your favourite Testo products directly online, taking advantage of any exclusive special offers or demo kit sales.


So, what are you waiting for?

Discover the brand new Testo website for yourself now by clicking the button below:

Testo Logo

Smart Air Conditioning Commissioning

When installing or maintaining air conditioning systems, it is important to ensure that the installation is running correctly and efficiently. Such commissioning and servicing aim at verifying the appropriate standard of the installation and detecting issues in order to improve and document the performance of the unit.

Especially in times of increasing energy costs, maintaining air conditioning systems is gaining more and more significance. A poorly-performing unit can easily exceed the annual heating costs of a building or amount to twice or three times the costs of a building’s lighting system. [1]

In order to improve the efficiency of an air conditioning system and reduce its energy consumption, it is important to use the right testing equipment, which provides all the relevant information in a simple and reliable way. This makes troubleshooting and performance verification easier and more accurate as it supports technicians in their daily work by improving their productivity and competence.

This trend led Testo to develop and introduce their new range of wireless probes this year, called Smart Probes.

sp-refrigeration-setTesto Smart Probes

This range of 8 handheld measuring instruments connects to Android or iOS smart devices via Bluetooth and communicates with a free App from Testo. Especially the Smart Probe Refrigeration Set, combining two high-pressure probes and two clamp probes, offers all relevant measuring instruments to ensure simple and accurate measurements of actual pressures and temperatures. Using the transferred data, the Smart Probes App then automatically calculates superheat and sub-cooling on the air conditioning system and helps monitoring and controlling them smart and efficiently. The effects of system adjustments can be seen quickly without the need for manual measurements and calculations. Results of the tests are recorded on site in PDF or Excel format and, after adding customer details to the report, can be emailed directly to the customer or to the office for filing.

t605iIn addition to the Refrigeration Set, two Thermohygrometer Smart Probes testo 605i can be a very useful supplement in order to calculate the air conditioning system’s capacity and can give a more comprehensive image of the unit’s efficiency. By measuring the relative humidity and temperature of supply and return air as well as entering the cubic feet per minute, the thermal energy in British Thermal Units (BTU) per hour, is automatically calculated and displayed in the App. This indicates the amount of heat per hour an air conditioning system can remove from an area and, thus, describes how quickly and effectively the unit cools a room. All measured values of the Refrigeration Set in combination with the two Thermohygrometers are displayed in the same App on one portable device and help engineers to work more efficiently and smarter than ever before.

t770-3Measuring an AC System’s Electrical Efficiency

The launch of the new electrical product range, now adds a third key feature to Testo’s smart way of measuring. The electrical clamp meter testo 770-3 offers the possibility of adding all relevant electrical measurements to your other measurements again in the same Smart Probe App. That means, voltage and current measurements enable the monitoring of an air conditioning system’s electrical efficiency. Additionally, the integrated power measurement function allows an automatic calculation of wattage within the app due to parallel voltage and current measurements. This supports engineers in determining the energy efficiency rating (EER) of the air conditioning unit as a ratio of the system’s cooling energy (in BTU/h) to its electrical energy (in Wh).

sp-app-iconThus, by using the same App, Smart Probes and the new testo 770-3 Clamp Meter provide engineers with all the information they need to efficiently measure, monitor and control air conditioning systems and help them to generate a comprehensive report on the unit’s efficiency and total performance.


To learn more about our unique and innovative range of instruments for HVAC/R engineers please visit our website: or give us a call on 01420 544433. Testo instruments are available from all good HVAC/R distributors.

Testo Logo


 [1] Cf. Val Kealey, “HVAC: What’s the cost?” Industrial Plant & Equipment, November/December 2015, p. 8.

Smart Tightness Testing with a Testo 510i Differential Manometer


Gas tightness testing is an essential operation in safety checking any gas installation, domestic or commercial. It will reveal any leaks in the system and identify potential risks from incorrect pressures and can help to spot wear and tear before it becomes a hazard.

Whilst an analogue u-gauge can be used to carry out the test, there is no proof of a system’s tightness, to provide peace of mind to both the customer and the gas engineer.


s1323-t510The Testo 510i is an affordable digital manometer that allows the installer to carry out gas pipe tightness tests and record the results using a free testo App on Android or iOS devices.

It connects wirelessly to a mobile device via Bluetooth, where the App provides a simple menu to operate tightness tests. Results of the tests can be recorded in PDF or Excel reports. Customer details can be imported from Contacts and added to the report. Reports can be emailed to the customer or to the office for filing.

The Testo 510i measures +/- 150 mbar. With a resolution of 0.01 mbar it can be set to warn the operator if pressure drops by 0.25 mbar, in line with the guidance from IGEM.

The testo 510i is an affordable alternative to current solutions, that offers heating engineers the ability to work smarter and offer a superior service to their customers.

Testo Smart Probes have proved hugely popular since their release at the beginning of 2016 and have attracted attention across the HVAC/R industry. In April, Testo Smart Probes won the ‘Product of the Year award at the AGSM Gas Safety Awards, a significant recognition of the instruments’ contribution to gas safety.


Also available is the Testo Smart Probes Heating Set. This compact set contains the testo 115i clamp thermometer, the testo 510i differential pressure measuring instrument and the testo 805i infrared thermometer.s1323-sp-heating-set

In conjunction with a smartphone or tablet, all heating system temperatures and pressures can be measured and checked. Users can read off their measurement values comfortably in the App installed on the end device.

To learn more about our unique and innovative range of instruments for HVAC/R engineers please visit our website: or give us a call on 01420 544433. Testo instruments are available from all good HVAC/R distributors.



Testo Limited Supports Gas Safety Week 2016


Gas Safety Week

Gas Safety Week is an annual safety week to raise awareness of gas safety and the importance of taking care of gas appliances. It is co-ordinated by Gas Safe Register with support from across industry including retailers, manufacturers, consumer bodies and the public.

Twenty three million households in United Kingdom, Isle of Man and Guernsey use gas for heating, hot water and cooking, yet we take it for granted that our boilers, cookers and gas fires are safe. Badly fitted and poorly serviced gas appliances can cause gas leaks, fires, explosions and carbon monoxide poisoning.


What can I do to stay gas safe?

There are a number of ways that you can make sure you stay gas safe. Here are some simple checks that you should do:

  • Always use a Gas Safe registered engineer when having gas work carried out in your home. You can find a registered engineer in your area by calling Gas Safe Register on 0800 408 5500 or visit
  • Check the front and back of your engineer’s Gas Safe Register ID card, making sure they are qualified to do the specific type of gas work you require.


  • Install an audible carbon monoxide alarm which will alert you if dangerous levels are present in your home.
  • Check for warning signs your appliances aren’t working correctly, such as lazy yellow or orange flames instead of crisp blue ones, black marks on or around the appliance and too much condensation in the room.
  • Get your gas appliances safety checked at least once a year and serviced in line with the manufacturer’s instructions. This includes your gas boiler, gas cooker and gas fire.


It is important that as many people as possible spread the word on Gas Safety so please visit for more information on Gas Safety week, and help by pledging your support today.

For more information on Testo instruments to help maintain Gas Safety please visit