The three instruments in the Testo 770 clamp meter family are designed for current measurement in switching cabinets. With a retractable pincer arm, cables in tight spaces can be easily accessed. Automatic measurement parameter detection ensures reliable operation, detecting direct and alternating current, as well as other parameters like resistance, continuity, diode, and capacitance. The Testo 770-1 is the standard version for daily tasks, including starting current measurement. The Testo 770-2 includes a µA range and optional temperature measurement with a thermocouple adapter type K. The Testo 770-3 calculates output ratings, features a Bluetooth interface, and can connect to the Testo Smart App for graph display of the measuring profile or direct documentation in a report.

Both instruments in the testo 755 current/voltage tester family are the first of their kind: voltage testers which meet the latest standard and which can also measure current. This means they are suitable for virtually all daily electrical measuring tasks. Each time they are used they automatically select the right settings and therefore prevent dangerous incorrect settings. Both instruments have all the important functions for determining voltage/de-energization, for measuring current and resistance, as well as for continuity tests. In addition, the integrated torch enables dark spots to be illuminated. The measuring tips can be changed easily, so that the whole instrument does not need to be replaced in the event of damage. The testo 755-2 model is differentiated by the larger current range of up to 1,000 V and special functions, such as the single pole phase testing and rotating magnetic field measurement.

The three models in the testo 750 voltage tester family are the first instruments with an all-round LED display. The display can be seen from any position and guarantees an ideal voltage indication thanks to its unique fibre optics. All three models meet the latest voltage tester standard EN 61243-3:2011 and have a safety specification according to CAT IV. They have the most important functions for voltage testing, continuity testing and rotating magnetic field measurement. The testo 750-2 is also suitable for single pole voltage testing and has a torch along with an RC trigger function. Vibrating load buttons ensure that the trigger test cannot be carried out accidentally. In addition, the testo 750-3 is fitted with an LC display to show the current reading.