• +49 2372 901 25 40

Warning lights

Warning and indication of hazardous test voltage

Warning lights serve to indicate, whether the DUT is connected to voltage, which means danger to life.
red = DUT under voltage – danger to life! / green = DUT not connected to voltage – no danger

According to EN 50191, the warning-light function can also be adjusted in a way that the warning is already given,
when the testing device is ready for operation.
red = testing device ready for operation – danger to life! / green = testing device not ready for operation – no danger

Product consultant

You need a personal product advice?
Please use our direct contact:
+49 2372 901 25 40
Email request


Always safely informed.

  • 360° visible
  • long-life LEDs
  • vertical warning lights
  • horizontal warning lights
  • warning lights on a test cover
  • warning lights on a test bench


4 solutions for your testing task.

Please select the desired test method:

List view

Warning light, horizontal

  • Cable length: 2 m
  • Operating voltage: 24 V (optional 12 V)
  • Optional LEDs

Warning light, vertical

  • Lead length: 2 m
  • Operating voltage: 24 V (optional 12 V)
  • Optional LEDs
  • Optional flashing lights

Warning light, vertical with magnet attachement

  • Lead length: 2 m
  • Operating voltage: 24 V (optional 12 V)
  • Optional LEDs
  • Optional flashing lights

Warning light with emergency stop

  • horiziontal
  • mounted to barrier post

If you haven’t found the perfect warning lights yet, please do not hesitate to contact us.

We would be pleased to help you find a custom solution:

Product consultant

Product consultant

Are you looking for a personal consultation?

Please contact us directly: +49 2372 901 25 40

Or simply send us your questions via e-mail.

E-mail inquiry


Visual indication of possible danger.

Warning lights indicate, if a test object is connected to voltage or not.

Light colour:

  • red= Test object connected to voltage- touching the test object may lead to death
  • green= Test object not connected to voltage- the test object may be touched without any danger


Additional information:
Result lights indicate the total and final result of a test.
Even customized special lights, triggerable by the tester belong to our scope of delivery.


Result Lights

Test result pass or fail
  • what is the test result?
  • green: go – pass – OK
  • red: no go – fail – not OK

read more

For further information please do not hesitate to contact our technical sales under:

print preview

SCHLEICH is a leading manufacturer of electrical safety, functional, winding and electric motor testing technology.

SCHLEICH is a world-renowned company that focuses on the development of innovative products in the field of testing technology for electrical products of all kinds.
From A to Z - everywhere SCHLEICH testing technology is in use worldwide. Our customers come from over 50 countries and regions. Everything is developed and produced in Germany.

Quality work - Made in Germany.

2022 - SCHLEICH is awarded for the fifth time as TOP100-Innovator
2016 - SCHLEICH released the first VoltageAnalyzer for measuring the real voltage directly at the winding terminals
2012 - SCHLEICH is awarded as TOP100-Innovator for the first time
2005 - SCHLEICH released the first stator tester with partial discharge test
1995 - SCHLEICH integrates touch-displays into testing devices as a world leader
1990 - SCHLEICH released the first safety and function tester with fully automatic integrated test terminal changeover
1987 - SCHLEICH released the first surge tester with PC-control under DOS and fully automatic integrated test terminal changeover
1985 - SCHLEICH released the first MotorAnalyzer
1982 - SCHLEICH focuses fully on electrical test engineering of electrical products
1952 - SCHLEICH is founded as a motor repair shop

Pioneering spirit, competence, curiosity, brand new technologies and innovations. This is what the 150-strong SCHLEICH team stands for - led by Martin & Jan-Philipp Lahrmann. Father & son. Your guarantors for long-term partnership.

Learn more about us


Scripts only