इसी प्रकार केGP-81B

• GP-81B
  • Triggered spark gap. O-A range (min/max) 40-100kV.
• GP-82B
  • Triggered spark gap. O-A range (min/max) 0.4-1.6 kV.
• GP-87
  • Triggered spark gap. O-A range (min/max) 10-24kV.
• GP-89
  • Triggered spark gap. O-A range (min/max) 0.7-2.1 kV.