A synchroscope is a specialized instrument used in electrical power systems to determine the synchronism between two alternating current (AC) sources or to synchronize the connection of a generator to a power grid. It provides visual indications of the phase and frequency differences between the sources, allowing operators to align the voltage and frequency of the incoming source with the existing system. By utilizing rotating pointers or a digital display, the synchroscope enables precise synchronization, ensuring a smooth transfer of power and preventing potential damage to equipment. It is an essential tool in power generation plants, substations, and other installations where accurate synchronization is critical for reliable and efficient operation.

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Yokogawa AB-40 106 Series – Synchroscope

New Old Stock

No longer manufactured by Yokogawa

Yokogawa stopped manufacturing panel meters in 2017. Limited stock is available at Electro-Meters.
Our panel meter specialists can customize these meters to fit your applications.

  • 4.5″ size
  • Water resistant construction
  • Slow-Fast scale

Hoyt HLS-110 SYNC Series – Digital Synchroscope

  • Standard 4.5-inch switchboard case
  • Input voltage: 110V AC, 120V AC or 240V AC
  • Front panel mount
  • 3 bi-colored LED indicators for “SYNC”, “GEN” and “BUS”
  • 24 LEDs in a circle display the phase angle and the frequency differences between 2 networks
  • 360° indication
  • 12 o’clock position LED is bi-colored

Hoyt HLS-110A SYNC Series – Analog Synchroscope

  • Standard 4.5-inch switchboard case
  • Input voltage: 120V AC or 240V AC
  • Frequency Range: 50Hz or 60Hz
  • Scale: SLOW / FAST
  • Indication: Moring pointer
  • 360° indication
  • Metal Case

Hoyt HLS-96 SYNC Series – Digital Synchroscope

  • Square shape panel 96 x 96mm
  • Input voltage: 110V AC, 120V AC or 240V AC
  • 3 bi-colored LED indicators for “SYNC”, “GEN” and “BUS”
  • 24 LEDs in a circle display the phase angle and the frequency differences between 2 networks
  • 360° indication
  • 12 o’clock position LED is bi-colored
  • PC window, ABS resin frame, PC case

Hoyt HLS-96A SYNC Series – Analog Synchroscope

  • Square shape panel 96 x 96mm
  • Input voltage: 120V AC or 240V AC
  • Frequency Range: 60Hz or 70Hz
  • Scale: SLOW / FAST
  • Indication: Moring pointer
  • 360° indication
  • PC window, ABS resin frame, PC case