testo 750-1 - Digital Voltage Tester

Order-Nr.  0590 7501

  • Patented all-around viewable LED voltage bar indication

  • 0 to 690 V AC/DC voltage measurement

  • Polarity detection for VDC measurements

  • Phase sequence test for determining motor rotation

The testo 750 voltage testers are the first instruments to include an all-around viewable LED voltage indication.  All three models include low input impedance, phase sequence, continuity test, and meet CAT III 1000 V CAT IV 600 V safety standards.

Product Description

Testo’s history of efficiency, innovation, and quality now extends into the entire electrical lineup. Once again, Testo brings high value, feature-packed products to the HVAC contractor market.


Delivery Scope

testo 750-1 digital voltage tester with low impedance, continuity, and phase sequence includes batteries, measuring tip protector, and measuring tip caps.
DC voltage

Measuring Range

12 to 690 V


according to DIN EN 61243-3:2010

AC voltage

Measuring Range

12 to 690 V


according to DIN EN 61243-3:2010

General technical data


11 x 3 x 1 in. / 280 x 78 x 35 mm

Operating temperature

14.0° to 122.0 °F / -10 to +50 °C

Protection class


Battery type

3 x AAA

Storage temperature

5.0° to 140.0 °F / -15 to +60 °C


8 oz. / 230 g

Overvoltage Category

CAT IV 600V; CAT III 1000V



Instrument Measurement Functions

Continuity testing


Rotating magnetic field testing


Single pole phase testing


Measuring point illumination


Transport Case

Ideal for voltage testing

  • Clear, all-round LED display, large fibre optic, anti-slip ring and ergonomic handle

Overview of applications

  • Test electrical circuits or systems for voltage or de-energization (according to DIN EN 61243-3:2010)
  • Checking the rotating magnetic field