HIOKI, Electrical Safety Tester

HIOKI 3174 AC Automatic Insulation/Withstanding HiTester
Ensure Insulation and Withstand Voltage with Contact Check The AC Automatic Insulation/Withstanding Tester 3174 is a low-cost solution featuring contact check functionality as well as a stabilized power supply to prevent the reduced test reliability that can result from these issues.

HIOKI 3157 AC Grounding HiTester
Protective Ground Tester Indispensable for Standards Certification
  The Hioki 3157 is an AC ground bond tester designed for protection circuit testing of a wide range of electrical equipment, including industrial machinery, medical equipment, and measuring instruments using a constant current system, enabling it to provide stable

HIOKI 3153 Automatic Insulation / Withstanding HiTester
All-in-one Model that Combines Withstand Voltage and Insulation Resistance (AC/DC)
  The Hioki electrical safety testers are designed for insulation resistance and voltage withstand testing of electrical devices and components according to various safety standards.