• Thermal imager with radio module for WLAN
• IR resolution of 240 x 180 pixels (with testo SuperResolution technology 480 × 360 pixels)
• Thermal sensitivity: <0.08 °C (80 mK)
• Free analytical software for creating professional reports
• Bluetooth wireless communication

The testo 871s thermal imager combines high infrared resolution with professional measuring performance and easy handling. Its high-quality pixel detector, integrated digital camera and, last but not least, the innovative functions are the features that impress. The testo Thermography App enables the testo 871s to offer smart thermography to meet professional requirements in industry and trade. The case supplied with the thermal imager means it can be conveniently transported, so it is always there for you when needed.

Testo developed the testo 871s thermal imager together with our experienced professionals to enable you to work quickly and easily with professional thermal imaging technology. You can generate error-free and objectively comparable infrared images using its handy functions. The IFOV warner, testo ɛ-Assist and testo ScaleAssist mean you can avoid measurement errors and not only effortlessly achieve optimum setting of emissivity (ɛ) and reflected temperature (RTC) for building thermography, but also of the color scale.

The testo 871s thermal imager– smart and networked

The testo 871s thermal imager communicates wirelessly via WLAN with your mobile terminal devices. The testo Thermography App for iOS and Android offers you the possibility of writing and sending reports on-site, as well as saving them online, and using your smartphone or tablet as a second display or for remote control.

The testo 871s delivers even more informative thermal images in combination with the compatible 770-3 clamp meter and the testo 605i thermohygrometer. Both are available separately – simply order them straight away along with your testo 871s. The measurement results of both measuring instruments can easily be transmitted via Bluetooth. The additional output, current and voltage values of the testo 770-3 clamp meter enable better interpretation of measured temperatures. Measure the air temperature and humidity with the testo 605i and easily detect locations at risk of developing mold using the special humidity palette in the thermal imager via the traffic light principle.

 Areas of application of the testo 871s thermal imager

Detect leaks, pinpoint thermal bridges, discover structural defects, identify overheated connections or assess mold damage. The testo 871s thermal imager is ideal for applications in daily maintenance and installation work in trade and industry. Quick, simple and reliable for maintenance and detection of defects.

 Technical highlights of the testo 871s thermal imager

Really simple operation with impressive professional thermal imaging technology: the testo 871s thermal imager has the following impressive features:

• Very good image quality due to high resolution: 43,200 temperature measuring points for precise thermography. Infrared resolution of 240 x 180 pixels - extendible to 480 x 360 pixels via integrated SuperResolution Technology
• Detecting temperature differences from 0.08°C
• The testo Thermography App enables you to write reports on site, save them online and send them by e-mail, as well as allowing you to use mobile terminal devices as a second display or for remote control
• Wireless communication thanks to Bluetooth – this means you can also wirelessly integrate the readings of the compatible testo 770-3 clamp meter and testo 605i thermohygrometer
• A built-in digital camera generates a real image in parallel to the thermal image
• Critical temperature conditions are directly displayed via automatic hot-cold spot recognition
• The testo ScaleAssist automatically ensures optimum setting of the thermal image scale, which means you generate objectively comparable and error-free thermal images, for example, the thermal insulation behavior of buildings
• The IFOV warner means the distance from the measurement object/measurement spot size is determined and the measurement spot is shown on the thermal image - you, therefore, avoid measurement errors because the camera shows you exactly what you can measure
• Pro software for image evaluation on the PC
• You can choose to save thermal images as JPEGs

Analysis with the Testo thermal imager is a fast and efficient method of detecting possible structural defects. Furthermore, the thermal imager is also ideally suited for providing proof of the quality and correct implementation of construction measures. Any heat losses, humidity and lack of air tightness arising in a building are visible in the thermal image. The Testo thermal imager offers the possibility of detecting structural damage and implementation defects in the thermal insulation – all using a non-contact method! The testo ScaleAssist function, which automatically ensures the optimum setting of the thermal image scale, means you get objectively comparable thermal images of buildings. This makes correct assessment of structural defects and thermal bridges easier than ever before. Detecting insulation defects and thermal bridges in the building shell is one of the typical applications.

In building thermography, infrared technology is ideally suited for the fast and effective analysis of energy losses in the heating or air conditioning of buildings. Thanks to its high-temperature resolution, the thermal imager provides detailed images of inadequate insulation and thermal bridges. It is impressive in terms of recording and documenting energy losses on outer windows and doors, roller blind casings, radiator niches, roof constructions or the entire building shell. The thermal imager is the best measuring instrument for comprehensive diagnostic and maintenance uses and is always a good choice when it comes to energy consultancy.

Reliable early detection of damage to production-relevant systems is essential in order to guarantee the safety and reliability of the system and prevent costly downtimes. Problematic areas in electrical and mechanical production facilities usually become evident due to an increase in the temperature of the affected components. You can use a thermal imager to detect critical heat conditions (known as hotspots) in your system directly during operation, therefore guaranteeing an additional bonus in terms of reliability. Typical applications for the thermal imager:

• Quick location of hotspots in electrical installations
• Detection of critical heat conditions in engines, shafts and bearings

Heating, ventilation and air conditioning systems can be quickly and reliably checked thanks to the easy and intuitive operation of the Testo thermal imager. Just a quick look with the thermal imager is enough to discover irregularities in temperature distribution. Thermography can therefore be used to easily locate clogged radiators and leaks.

Typical applications for the thermal imager:

• Pinpointing the course of heating loops in an underfloor heating system
• Checking radiators for silting
• Measuring the flow and return temperature

If a pipe rupture is suspected, the only solution left is often to break open entire wall or flooring areas. The thermal imager enables you to minimize damage and reduce costs because you locate precise leaks in underfloor heating and other inaccessible pipelines. This avoids opening up walls and floors unnecessarily and considerably reduces repair costs.

Thermal bridges waste energy. Condensation can also form in these places due to humidity in the ambient air. As a result, mold develops in these areas with the associated health risks for the occupants. The thermal imager uses the ambient temperature and humidity, determined externally with the testo 605i Smart Probe, along with the measured surface temperature to calculate the value of the relative surface moisture for each measuring point directly in the measuring instrument. Mold formation is therefore shown on the display before it becomes visible: areas at risk are displayed in red, and those not at risk in green. This makes it possible to introduce measures to prevent dangerous mold formation in good time - including in hidden corners and alcoves.

If doors or windows are not correctly fitted, in winter cold air can enter or warm indoor air can escape. This results in draughts, increased ventilation heat loss and above all high energy costs. The combination of thermography and Blower Door has really proved its worth. This procedure involves creating a negative pressure in the building, so that cool outside air can flow into the interior of the building through leaky joints and cracks. A Testo thermal imager makes the detection of leaks considerably easier here. Any leaks are located – before facings and fittings for the new build make repair work complicated and costly.