Electrical, Products, Testo

Voltage tester – testo 750-3


The testo 750-3 voltage tester is the most innovative voltmeter on the market. The clear all-round LED display with fibre-optic technology for ideal voltage indication can easily be read in any position. A second LC display also indicates the current reading. An anti-slip ring and the ergonomic shape of the handle also ensure you can work comfortably. The integrated torch helps with the illumination of dark measuring points. And the voltage tester is extremely durable thanks to the robust housing.
The testo 750-3 voltage tester is first and foremost suitable for determining voltage or de-energization on electrical circuits or systems. In addition, it can also be used to test continuity, measure rotating magnetic fields and test residual current circuit breakers via the RC trigger function. Vibrating load buttons ensure that trigger tests cannot be carried out accidentally.

  • Clear, patented all-round LED display
  • In accordance with DIN EN 61243-3:2010 and CAT III
  • Clear, patented all-round LED display
  • RC trigger function and vibrating load buttons
Delivery Scope

testo 750-3 voltage tester, including batteries, measuring tip protector, measuring tip caps, calibration protocol and instruction manual.


Download DataSheet Instruction Manual

Application Image

Technical Details

DC voltage Measuring range 12 to 690 V
Resolution max. 0.1 V
Accuracy ± (3 % of mv + 5 Digit)
AC voltage Measuring range 12 to 690 V
Resolution max. 0.1 V
Accuracy ± (3 % of mv + 5 Digit)
General technical data Operating humidity 0 to 95 %RH
Weight 295 g
Dimensions 270 x 70 x 35 mm
Operating temperature -10.0 to 50.0 °C
Product colour Black
Protection class IP64
Standards EN 61243-3; EN 61326-1; EN 61010-1
Battery type 2 AAA micro batteries
Display type LCD (Liquid Crystal Display)
Display size one-line
Storage temperature -15 to +60 °C
Overvoltage Category CAT IV 600V; CAT III 1000V
Authorizations CSA; CE
Instrument Measurement Functions Continuity testing yes
Display ligthing yes
Hold yes
RDC/RC trigger function yes
Rotating magnetic field testing yes
Single pole phase testing yes
Measuring point illumination yes