Category Archives: thermography

Thermal imaging cameras from testo: The ultimate diagnostic tool

For contractors 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.


With testo thermal imaging cameras you see more…


  • Clear, visual presentation of the condition of any underfloor heating system.
  • Trace hidden pipework and find leaks quickly and easily.
  • Non-destructive surveying saves time, money and gives you happier customers.
  • View radiator performance at a glance and show your customers the benefits of power flushing heating systems.








Testo 865

  • Infrared resolution 160 x 120 pixels
  • Thermal sensitivity 0.12 °C
  • SuperResolution technology available in the imager and App (to 320 x 240 pixels)
  • Automatic detection of hot and cold spots
  • IFOV warner
  • testo ScaleAssist
  • Pro software for image evaluation on the PC

Now available for £699


Testo 868

  • Infrared resolution 160 x 120 pixels
  • Thermal sensitivity 0.10 °C
  • SuperResolution technology available in the imager and App (to 320 x 240 pixels)
  • Automatic detection of hot and cold spots
  • IFOV warner
  • Integrated digital camera
  • Thermography App
  • testo ScaleAssist- testo ε-Assist
  • Pro software for image evaluation on the PC

Now available for £1,099





Like some more info?

If you would like further information regarding testo thermal imaging cameras please go to or call us on +44 1420544433 and we’ll be happy to help



Enter our prize draw at PHEX Alexandra Palace for your chance to win a testo Digital Multimeter

Visit the Testo stand at PHEX Alexandra Palace and see our full range of flue gas analysers plus the widest range of HVAC instrumentation available from any manufacturer.

Show details:

Venue: Alexandra Palace

Date: 20th – 21st June 2018

Stand Number: 12


Digital multimeter prize draw

Testo will be offering visitors to our stand the chance to win a testo 760-2 Digital Multimeter – this great prize takes automatic measurement to the next level. This digital multimeter is suitable for all important electrical measurements.


Win a test 760-2 Digital Multimeter worth £99.00


New lower pricing

New pricing is being announced at PHEX with Testo making high quality thermal imaging and electrical testing more affordable than ever.


  • Thermal imaging cameras for heating and plumbing starting at £699.
  • Electrical multimeters starting at £59


With the testo 865 camera now available from just £699, heating engineers who want to diagnose where and how pipework or underfloor heating systems have been laid, locate leaks on pipework, and many other tasks within heating system diagnosis, now have the perfect tool for the job.


A clear, high resolution thermal image is essential for many heating plumbing applications, especially locating water leaks. Testo 865 provides the highest resolution image available in this price range due to the 160 x 120 sensor with thermal sensitivity of just 0.12°C. The Testo 865 camera allows the user to quickly and easily prove the performance of heating systems and offers a simple way save time in many areas of application.


Testo are also showing the range of electrical test instruments designed with the HVAC engineer in mind. From the Testo 760-1 which offers possibly the simplest to use multimeter on the market, with its innovative ‘input detection’ system making it less likely that a user will set the incorrect input for the testing being carried out, through to the Testo 770-3 clampmeter which offers all the usual functions of a DMM but also offers commercial heating engineers the ability of fast testing of FFD’s on gas burners via its µA current range setting. Additionally, the Testo 770-3 offers a Bluetooth connection to the free Testo ‘smart’ App allowing display of parameters via a smartphone or tablet device, and simple on-site reporting of measurements


Visit us at the show

Register for your free tickets at:


Like some more info?

If you would like more information on testo’s range of HVAC instruments please visit or call us on +44 1420 5444 33 and we’ll be happy to help



Get to know Testo’s food safety equipment and measuring technology

The frequency of UK food alerts has been steadily increasing in recent years. As the food standards agency reports, there were 56 food alerts issued in both 2013 and in 2014. The frequency in 2015 and 2016 was more than double that (121 and 148 food alerts respectively).

With this increase, the need for effective quality processes is emphasised. Both to reduce the risk of such an event occurring, and to provide proof of the highest level of due diligence, should an irreversible issue of this nature occur. Manufacturers therefore, need to be confident that both their processes and safety equipment are bulletproof. Keeping such cases to a minimum is of course the end goal, but quality managers need the correct tools to ensure safety and the company’s HACCP plan is upheld.

Here we go through some of the most important safety equipment and measurement technology, for establishments to protect the safety and reputation of their operation:


Automated temperature monitoring

One overnight system failure can cost a company hundreds of thousands of pounds in wasted goods, an this is something that ironically, can be very easily avoided with an automated temperature monitoring system.

Testo’s Saveris 2 for example, is a cloud-based system that logs and stores all measurement data in one central place. Facility managers can place a wi-fi data logger in the warehouse or storage room to monitor fluctuations in temperature and have alerts sent to their email or phone. The user can then access the readings via their computer tablet or smartphone via the App.

Another advantage of an automated system, is it removes the need to collect data manually, meaning staff can use this additional time for other important tasks. Additionally, having data collated automatically, means there is no longer a potential for gaps, or readings to go missing. Handy in the case of audits.


Data loggers

As well as monitoring systems, Testo manufacture data loggers suitable for a range of applications in the food processing sector. These range from low-cost loggers for measuring temperature in a cold storage room for instance, right through to the temperature of production items or the surface temperature of machines or motors themselves and have the capability to measure even the most extreme temperature ranges, for high-end production processes. All Testo data loggers are certified for HACCP.




Thermometers are required in a number of applications during food manufacturing, for simple temperature spot checks. In this sector more than most, robustness is a hugely important factor for equipment. The Testo 108 thermometer for example, is waterproof, sturdy, and has an IP rating of IP67, making it ideal for manufacturing plants. It also has the option for colour-coded cases, meaning you can allocate different probes to specific food groups, avoiding contamination. All Testo thermometers are certified for HACCP.




Infrared thermometers

Infrared measurement can be a very useful feature in the food industry, particularly in the processing and retail sectors. It can be used as a quick indicator for surface temperature of the product, when penetration isn’t appropriate (if this will cause irreversible damage for example). Testo produce a range of infrared thermometers, ideal for spot checks during manufacturing processes.



pH Meters

Testing pH levels is a common method of deducing if edible materials are fit for the public. pH levels impact the appearance, taste and quality of food products. For example, during yoghurt production, improper pH levels can cause discolouration or insufficient tartness. In contrast, incorrect pH values in pork impact’s the meat’s water holding capacity, negatively affecting the product’s saleability. Testo’s range of pH meters are ideal for measuring the pH value of semi-solid media, viscous and protein-containing foodstuffs (eg. processed cheese, fruit).


Cooking Oil Tester

Cooking oil testing is being used more and more within the restaurant and hospitality sector, but can also be used to the advantage of food manufacturing facilities for products where frying is required (crisps or donut production for example). In order to ensure you’re being economical with your oil, you need to test the TPM (total polar material) levels. The testo 270 Cooking Oil Tester offers a solution for controlling cooking oil consumption, as well as testing oil quality, to ensure consistent product quality. The testo 270 has been certified by both HACCP and NSF.


Thermal Imaging Cameras

Thermal imaging can be used in food production to reduce downtime, by checking mechanical components for wear so preventative maintenance can be scheduled to replace components that have degraded over time, before they cause failure and loss of production.

Another area a thermal camera can be used is in refrigerators or cold storage rooms. Using thermal imaging, you can identify areas where mould and other bacteria can grow putting food at risk and also detect faulty seals on refrigerated units leading to wasted energy.


Like some more info?


If you’re interested in finding out more about how Testo equipment can be used to help with your food safety strategy, please go to


Testo at PlumbExpo 2018

This year at PlumbExpo testo will have a selection of popular instruments on display. Visit our stand P124 to get hands on with the instruments and to see and feel the quality. Come and have a chat to our expert team who can help answer any questions you may have about our products and their applications.


Win a testo Smart Probes Heating Set

We are giving visitors to PlumbExpo a chance to win a testo Smart Probes Heating Set worth £185 just by heading over to the Testo stand P124 and putting your details into the draw – the winner will be announced shortly after the show closes on the 1st February.

The compact testo Smart Probes Heating set with the testo 115i clamp thermometer, the testo 510i differential pressure measuring instrument and the testo 805i infrared thermometer is ideal for key measuring tasks carried out by heating engineers.


What’s on show?


The testo 320 Flue Gas Analyser

Visit the Testo stand to see the new testo 320 Flue Gas Analyser. Designed to provide the domestic engineer with all the functionality to provide a complete heating system diagnosis, the testo 320 Flue Gas Analyser has a colour graphic display, providing a unique user interface experience to allow simple access to measurement menus for flue gas analysis, draught measurement, pressure, ambient CO measurement, letby & tightness testing, and many more. Use the testo 320 to quickly determine and eliminate malfunctions, monitor legal limit values and spot checks in daily work on servicing heating systems.

The testo 320 Flue Gas Analyser comes as standard with Bluetooth communication to android devices such as a smartphone or tablet device using the Testo Combustion App. This allows users to control the analyser remotely, view graphical data on set parameters, and also provide fast and efficient reports on measurements direct from site via email.

The Testo 320 can also be equipped with optional probes to provide the abilty to carry out gas leak detection on pipework, and also if required measurement of ambient CO & CO2 values.

To keep the total lifetime costs of using a flue gas analyser to a minimum, Testo Service and Calibration is available from our UKAS (ISO/IEC 17025:2005) accredited laboratory and comes with simpler pricing. Choose from two service options- Pure and Premium. With Premium level service users of Testo analysers get a true ‚fixed cost‘ service and calibration offering, which for the testo 320 model is £139 per year and includes all sensors, service parts required, and carriage.


Our award winning Smart Probes and Thermal Imaging Cameras

Smartphones and tablets make our day-to-day life easier in almost every situation, so why can’t this apply to contractors’ measurement tasks? That’s precisely what Testo’s product developers asked themselves – and the result was the Smart Probes range. Eight pocket-sized professional  measuring instruments which can be connected to a smartphone or tablet via Bluetooth and are operated entirely via the free Smart Probes App. Each instrument has been designed for it’s own specific application, measuring temperature, humidity, pressure or air velocity. Competitively priced, Testo Smart Probes are the ideal instruments for HVAC contractors with an enthusiasm for technology.

Also on show will be our thermal imaging cameras, Testo 865, Testo 868, Testo 871 and Testo 872, designed for many applications within the buildings and electrical trades for fast identification of faults and problems such as overheating electrical connections and wiring, tracing hot water pipework, leak detection, and many others. With some models offering WiFi connection to a smartphone or tablet device this allows users to provide fast and efficient reports from site via email.


Our latest range of electrical test instruments

The testo 760 Digital multimeter makes day to day testing of voltage, current, and resistance simple, with its innovative operation that uses automatic recognition of test lead position to then set the parameter to be measured. Unlike traditional multimeters that use a rotary style dial to set a parameter, the testo 760 ensures that the engineer does not mismatch the test lead position to the required input, and if an incorrect setting is applied the instrument will prompt the engineer with a warning message on the display and not allow the parameter selection. This feature enhances the safety when using a multimeter as it helps prevent damage to the instrument through incorrect input selection.

For engineers who require simple measurement of current values in day to day tasks the testo 770 Clampmeter offers a fast and simple way to measure both AC & DC currents without having to break the circuit. With a unique clamp mechanism that allows the user to select a cable for testing even in the narrowest spaces, the testo 770 combines a clampmeter design with the added functionality of a DMM.

As well as the current clamp, the testo 770 can measure AC/DC voltage, resistance, and continuity using the supplied test leads just like a standard DMM. For heating engineers, the testo 770-2/3 versions offer a μA measuring range enabling fast testing of FFD’s on gas burners. Additionally, the testo 770-3 offers a Bluetooth connection to the free Testo ‘smart’ App allowing display of parameters via a smartphone or tablet device, and simple on-site reporting of measurements.

Show details

Date: 31st Jan – 1st Feb

Venue: Alexandra Palace

Register for FREE tickets at:

Like more info?

If you would like more information on any of the products mentioned above or any of our products, please visit

Alternatively if you’ve got a requirement you’d like to discuss, you can call us on 01420 544433 and we’ll be happy to help.


A competition prize worth £269, a NEW product launch, and More! Find out what Testo has on offer at the HVAC & Refrigeration Show!

Testo have led the ‘smart’ revolution in giving HVAC/R service engineers a wide range of test instruments with Bluetooth connectivity to smartphones or tablet devices, enabling them to work smarter and to gain benefits such as on-site reporting and improved documentation of test results.

Now you have the chance to win a free testo 550 digital manifold worth £269 at the HVAC/R show just by heading over to the Testo stand B39 and putting your details into the draw – the winner will be announced just after the show closes on the 25th January.

The Testo 550 is a 2-port manifold allowing the engineer to get fast and accurate measurements of highside and lowside pressures as well as condensing and evaporation temperatures. The other added bonus of moving to digital manifolds is that the user also gets real time display of superheat and subcooling values as well.

An often overlooked additional benefit of Testo digital manifold’s is that they allow the user to easily update the device for new refrigerants that are introduced via a smartphone or tablet and the Bluetooth app. Currently the testo 550 supports over 60 different refrigerants. Also, the manifold incorporates a temperature compensated leak test function that allows engineers to fully test a system and shows the start/end system pressure and the time of the test.

The free App to support the manifolds also allows on-site documentation of test results with the ability to provide clear and concise reports for clients.


Also on the stand

Introducing the NEW testo 440

At the HVAC & Refrigeration show we will be launching a new air velocity & IAQ measuring instrument to the public. The testo 440 combines a compact handheld measuring instrument with user-friendly measurement menus and wide selection of wireless probes – for the versatile and convenient measurement of all air conditioning, ventilation, and indoor air quality parameters.

We will have the new testo 440 and a selection of probes on display at the show. Visit our stand B39 to get hands on with the new product and find out more about its functions and applications.

Smart Probes Refrigeration Set

From the award winning Testo ‘Smart Probes’ range comes the ‘Refrigeration Set’ which effectively turns your smartphone into a digital refrigeration manifold, with clear display of both highside/lowside pressure and temperatures as well as direct readings of superheat and subcooling values – all without requiring any use of traditional temperature/pressure lookup tables, and giving faster, more accurate measurements of a refrigeration systems performance.


Digital Manifolds

For users who prefer a more traditional ‘digital’ manifold type product the testo 550 and testo 557 units provide either a 2-port (testo 550) or 4-port (testo 557) option. Again, these products have Bluetooth communication to the free to download ‘Refrigeration App’ and this allows engineers to view the measurements either directly on the manifold, or remotely up to 10m away on their smartphone or tablet.

With many existing refrigerants having major increases in costs it is more important than ever to make sure that systems are fully pressure tight before filling to ensure no loss.  A key function with the Testo digital manifolds is the ability to perform a temperature compensated tightness test following any work to repair a leak to a system, and this is one area where traditional ‘analogue’ gauge sets can often perform poorly.

Finally, with all the changes going on as part of the drive to refrigerants with lower GWP it is essential that engineers can update any manifolds to suit. Again, with traditional analogue type units this normally means extra cost in purchasing new gauges, however with the Testo digital manifolds any update to the refrigerants tables available is simply done via the Bluetooth connection to the free ‘Refrigeration App, ensuring that refrigeration and AC engineers are always in touch with technology changes.


About the show

Formerly the ACR show, the HVAC & Refrigeration show only comes around every other year and is the UK’s only dedicated exhibition for the refrigeration, air conditioning, ventilation, heating and heat pump sectors, so don’t miss out!

Venue: Excel London

Dates: 23rd -25th January

Register for free tickets at:

Like more info?

If you would like more information on any of the products mentioned above or any of our products, please visit

Alternatively if you’ve got a requirement you’d like to discuss, you can call us on 01420 544433 and we’ll be happy to help.