Press release #Power Tools

Reliably identifies weak spots: Bosch GTC 400 C Professional thermal imager

Detect temperature differences at a glance

  • Fast exchange: Data transfer to the Bosch Measuring Master App
  • Simple assignment: Thermal and real images are taken simultaneously
  • Flexible operation: Dual power supply using 12 volt or alkaline batteries
Manuel Roj

Manuel Roj >


Create clarity from the first evaluation through to the documentation – tradespeople on construction sites can work efficiently and save time by using the GTC 400 C Professional thermal imager from Bosch. The tool generates a conclusive thermal image with detailed information, and therefore helps to assess the situation quickly. Additionally, it provides important findings for pre-paring offers and enables the results of work to be checked

Fast overview of weak spots and possible damage

Checking that radiators and underfloor heating work evenly, detecting overheating in electrical installations or finding thermal bridges, energy losses and sources of air draft – all this is simple to complete using the thermal imager. The GTC 400 C Professional reliably identifies weak spots and provides tradespeople with a fast overview – for instance to ensure that no underfloor heating lines are damaged when installing drywalls. The thermal imager accompanies and assists tradespeople in every phase of their project: From advising customers with a visualization of the problem areas, to preparatory tasks such as inspecting where lines are installed, through to efficient documentation and follow-up work.

Fast data exchange and further processing via smartphone or PC

The GTC 400 C Professional is equipped with a Wi-Fi module which the tool uses to establish its own Wi-Fi hotspot. Users can connect their smartphone or tablet to the tool and import the thermal images, including the measured data, to Bosch’s Measuring Master App . This makes it possible to pass the thermal images produced and the measured data on to customers, colleagues or other trades. The images taken can be edited directly in the app, and notes or information can be added. Alternatively, the raw data of the thermal images can also be transferred to a PC by micro USB connection in order to edit this data using the free GTC Transfer Software, or to create reports and offers.

Deep information and real image camera for simple assignment

With a wide field of view of 71 degrees, the thermal imager provides a detailed picture, even when the image is taken near the object. In the saved thermal images with a resolution of 160 x 120, each of the 19,200 pixels on the 3.5 inch display corresponds exactly to one measuring point and provides a detailed, informative thermal image. Thanks to the high thermal sensitivity, even the smallest temperature differences can be displayed.

The operation of the tool is intuitive. For example, the image-in-image function can be activated at the push of a button. This displays the thermal image within the context of the original image, which makes it easier to assign and locate measurements. To make slight temperature differences or contrasts even more visible, users can choose between different color modes for displaying the thermal image. The tool automatically marks the coldest and warmest pixel on request. This allows loose terminals in control cabinets to be located, for example. The dynamic scale automatically adapts to the minimum and maximum values measured, but can also be fixed using lock mode. This provides a standardized reference scale with identical visualization, which can be useful for measurements in several rooms with different temperatures.

The dual power supply provides users with flexibility: The tool can be operated both with a replaceable 12 volt rechargeable battery from the Professional range and with four alkaline AA non-rechargeable batteries. For use on construction sites, the tool has IP 53 dust and splash protection.

The GTC 400 C Professional thermal imager will be available from November. All prices are recommended retail prices excluding VAT. Subject to change.

SpecificationsGTC 400 C Professional
Measuring range-10 °C to +400 °C
Temperature measuring accuracy± 3 °C/± 3%
Thermal sensitivity< 50 mK
Infrared sensor resolution160 x 120, 19,200 pixels
Field of view71°
Display size3.5” color display
Dust and splash protectionIP 53
Image memory (number of imag-es)> 500 images
Power supply12 volt lithium-ion rechargeable
battery, alternatively with AA1 Professional battery adapter: 4 x 1.5 V LR6 (AA) batteries
Dimensions (length x width x height)95 x 63 x 233 mm
Weight 540 g
Scope of delivery/Recommended retail price excluding VATTool including 12 volt rechargeable battery with 1.5 Ah, GAL 1230 CV Professional charger, L-Boxx, hand strap and micro USB cable: €999

The Robert Bosch Power Tools GmbH, a division of the Bosch Group, is one of the world’s leading providers for power tools, garden tools, power tool accessories and measuring tools. In 2022, its roughly 20,000 associates generated sales of 5.9 billion euros, about 90 percent of which outside of Germany. With brands such as Bosch and Dremel, the division stands for customer focus and great engineering progress. The core success factors are innovative strength and pace of innovation. In 2023, Bosch Power Tools will again launch more than 100 new products onto the market in its four business segments power tools, garden tools, accessories and measuring tools.

The Bosch Group is a leading global supplier of technology and services. It employs roughly 421,000 associates worldwide (as of December 31, 2022). The company generated sales of 88.2 billion euros in 2022. Its operations are divided into four business sectors: Mobility, Industrial Technology, Consumer Goods, and Energy and Building Technology. As a leading IoT provider, Bosch offers innovative solutions for smart homes, Industry 4.0, and connected mobility. Bosch is pursuing a vision of mobility that is sustainable, safe, and exciting. It uses its expertise in sensor technology, software, and services, as well as its own IoT cloud, to offer its customers connected, cross-domain solutions from a single source. The Bosch Group’s strategic objective is to facilitate connected living with products and solutions that either contain artificial intelligence (AI) or have been developed or manufactured with its help. Bosch improves quality of life worldwide with products and services that are innovative and spark enthusiasm. In short, Bosch creates technology that is “Invented for life.” The Bosch Group comprises Robert Bosch GmbH and its roughly 470 subsidiary and regional companies in over 60 countries. Including sales and service partners, Bosch’s global manufacturing, engineering, and sales network covers nearly every country in the world. The basis for the company’s future growth is its innovative strength. At 136 locations across the globe, Bosch employs some 85,500 associates in research and development, of which nearly 44,000 are software engineers.

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