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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.


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.

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Thermal Imaging – It’s all about the resolution

Not all thermal images are the same. If you are using thermography for example to detect leakages, cold bridges, mould or overheated components, the details matter. These elements, as well as many others, only become visible from a resolution of 160 x 120 pixels. Every pixel is a measuring point, therefore the higher the resolution, the more accurately you measure. And when you measure more accurately, you detect irregularities earlier, avoiding unnecessary damage for you or your customer.



Screen resolution is hugely important for all types of thermography


Another big advantage of using a camera with exceptional resolution is that thermal images can be taken at far greater distances, without affecting the image quality. In addition to this, low spec thermal images can be unclear, and often don’t provide a true or accurate reading. It is for these reasons that many only consider thermal imaging from a resolution of 160 x 120 pixels “real thermography”, with true value, rather than just a gimmick.

Thermal imaging is used in a number of industries, however in order to fully utilise this technology you first need make sure you’re using a quality camera. A good thermal camera should be a robust, quality tool which can be used for many day to day applications. Here are some examples where having the facility to take clear, crisp, non-intrusive thermal images is a huge advantage:


Checking heating installations

Whether pipes hidden under plaster, or leakages: With a thermal camera, you can non-intrusively make visible what you cannot see with the naked eye. You effortlessly visualise underfloor heating courses, and check the performance of a radiator at a glance. In these applications, a thermal sensitivity (NETD) of at least 100 mK is also important, in addition to the resolution.


blocked radiator 2

Using thermal imaging you can visualise heat distribution of radiators and heating systems


Inspecting switching cabinets

In switching cabinets, malfunctions are usually preceded by a temperature increase. With top-quality thermal camera you can not only measure this, but also visualise it. This can all be achieved precisely, without contact, and before it’s too late. The high-quality 160 x 120-pixel detector never misses an overheated contactor, an overloaded cable or an insufficiently tightened clamp.


testo-thermal-imaging-overheating cable

With a thermal camera you can pinpoint overheating cables immediately


Discovering building defects

Using thermal imaging you can discover and analyse cold bridges and sealing or insulation defects quicker and more efficiently than with any other tool. This results in the following advantages for you:

  1. Ensure building quality and can initiate preventive measures.
  2. Impress with the visual presentation of the quality of your work.



Thermal analysis is an efficient method of detecting structural defects


Identifying mould danger

High quality thermal imaging cameras calculate the humidity value of each measuring point from the externally determined ambient temperature, the air humidity, as well as the measured surface temperature. The humidity palette in the imager then uses the traffic light principle to represent the different risk zones:

Green = no risk

Amber = caution, mould formation possible

Red = mould danger



With thermal imaging you can outline areas at risk of damp before anything is visible to the naked eye


For more details on thermal imaging please visit our website or if you’ve got an enquiry you’d like to discuss, give us a call on 01420 544433 and we’ll be happy to help.

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The New testo 869 Thermal Camera – making top-quality thermography affordable

The testo 869 thermal imaging camera was developed in collaboration with experts from the heating industry, building trade, and facility management. It is perfect for detecting leaks, pinpointing thermal bridges or visualising overheated connections.

Combining high infrared performance, easy operation, and an unbeatable price, the new testo 869 makes high-quality thermography affordable for everyone. Built specifically for functions in a contractor’s daily job, its professional technology belongs in every toolbox.


The Testo 869 has been built specifically for contractors


Technical Highlights

  • High resolution for very good image quality: 19,220 temperature measurement points for precise and accurate measurement results – infrared resolution 160 x 120 pixels
  • Visualise small temperature differences: The thermal sensitivity is smaller than 120 mK
  • Focus-free 34° lens ensures a wide field of view, perfect to view the temperature distribution of measurement objects
  • Display of critical temperature conditions: automatic hot/cold spot recognition.
  • Pro software for easy image evaluation on the PC
  • Option to store thermal images in JPEG format


At only £799 it’s our best ever priced thermal camera, whilst still possessing testo quality


Key Applications

Thermal imaging can be used for a huge variety of tasks, across many different industries. From mechanical maintenance to checking freezer doors are correctly shut, the number of uses really is boundless. Here are just a few of the key applications thermal imaging is used for all over the world:


Detecting structural defects and ensuring construction quality

Analysis with a Testo thermal imager is a fast and efficient method of detecting possible structural defects. Furthermore, thermal cameras are ideal for providing proof of the quality and the correct implementation of construction measures. Any heat losses, humidity or areas of air permeability in a building will then be visible. The testo 869 makes it possible to detect faulty thermal insulation and structural damage – all using a non-contact method!

Typical applications:

  • Checking the air tightness of windows and doors
  • Finding insulation defects and thermal bridges in the building shell
  • Detecting and visualising areas that are prone to mould
  • Mapping underfloor heating systems



Thermal imaging is widely used to detect structural defects in buildings


Easy monitoring of heating and installation systems

Testo thermal imaging cameras are user friendly and easy to operate, so are ideal for quick checks of heating, ventilation and air conditioning systems. A quick glance is enough to discover irregularities in the temperature distribution. Thermography is the perfect solution for uncovering clogged radiators and leaks.

Typical applications:

  • Pinpointing the course of heating loops in an underfloor heating system
  • Checking radiators for the build-up of deposits
  • Measuring the supply and return temperature
  • Locating leaks



With a testo 869 you can see how well radiators are working or whether they need bleeding


Checking as part of electrical maintenance

With electrical installations or cables in general, increased temperatures are always an indication of an overload, an imminent malfunction or an existing defect. Using thermal imaging you can evaluate the heat status of low, medium and high-voltage systems. Thermographic images lead to the early detection of defective components or connections, so the necessary preventive measures can be introduced in a targeted way. This therefore minimises dangerous fire risks and prevents costly production downtimes.

Typical applications:

  • Checking switch cabinets
  • Checking electrical connections
  • Monitoring and checking photovoltaic system


Testo electrical thermal imaging

With a thermal camera you can locate the source of the problem without having to be intrusive


Want to find out more about the testo 869?

For more information on this fantastic offer visit: or give us a call on 01420 544433 and we’ll be happy to help.

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Safe maintenance of electrical systems using thermal imaging

Faulty electrical connections or overloaded switching systems in electrical distribution boxes, or electric drives can lead to costly production downtimes and even fire damage. Regular inspection of electrical installations and systems with a thermal camera significantly reduces the risk of such issues occurring. Using thermal imaging any abnormalities can be identified at a glance, meaning preventative measures can be taken immediately.


Electrical systems need to be operated with the greatest security possible


The challenge.

Roughly 70% of all weak spots in electrical systems can be traced to faulty clamp connections. This can be due to aging, incorrect installation, mechanical load or damage to the system components. Electrical energy then develops into heat, in some instances causing systems to overheat. This can have catastrophic consequences: Machines can break down, production lines come to a standstill, or system components have even been known to burst into flames.


testo-thermal-imaging-overheating cable

Ignoring even one overheating cable can have devastating repercussions


The solution.

Testo thermal imager models can be used on all electrical systems to localise faulty electrical connections, for discovering asymmetrical load distribution or for identifying overloaded conditions of any kind. They show the surface temperature distribution of electrical components at a glance. This allows weak spots to be identified early so faulty parts can be repaired or replaced before a breakdown can occur.



Thermal analysis is completely contactless, so normal activity doesn’t need to be disrupted


The great advantage of thermographic testing with a thermal camera is that technical systems can be examined without any contact whatsoever. The continuous operation of the system can be examined without disrupting any electrical systems which are currently in use. By regularly checking a system with a thermal camera, both downtime and the risk of fire will significantly decrease. The highest possible level of security is therefore guaranteed for both the people working with the system and the system itself.


overheating cable

With a testo thermal imaging camera you can pinpoint the issue in a matter of seconds


On the whole using thermal imaging lowers the maintenance and energy costs of any electrical system – by avoiding unexpected repair work and by optimising the quantities of energy used. Whether you wish to test transformers, electrical distribution boxes, switching systems or electric drives, a testo thermal camera is the perfect solution.


Want to discover more about thermal imaging?

For more information on testo thermal cameras or any testo products please visit our website: or give us a call on 01420 544433 and we’ll be happy to help.

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