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F70 Specifications

• Mechanical: 3-piece breakdown aluminum pole system, batteries under elbow, Armrest adjustment - forward/backward.
• Search coil: 9 3/4” open-frame waterproof concentric elliptical search coil.
• Batteries: 4 AA, alkaline (not included).
• Weight: 2 pounds 15 ounces (1.3kg), with alkaline batteries installed.
• Operating Principle: VLF induction balance
• Operating Frequency: nominal 13 kHz, quartz crystal timing reference
• Basic Sensitivity: 6 x 109 root Hertz (detectivity)
• Lag Coefficient: 78 milliseconds
• Overload: standard 10” elliptical concentric
  Reactive approximately 10,000 micro-cgs
  Resistive approximately 1,200 micro-cgs
  accessory 11” bi-axial
  Reactive approximately 30,000 micro-cgs
  Resistive approximately 3,700 micro-cgs
• Resistive Overload: approximately 1,200 micro-cgs units (volume susceptibility)
  4,800 micro-cgs units with sensitivity < 30.
• Ground Balancing Range: From ferrite to salt, inclusive
• Discrimination
  Ground Suppression: combination of second and third order methods
  ID Ground
  Suppression: third order
• Battery Life: Typically 40 hours with high quality alkaline batteries
  Estimated 80 hours with nickel oxyhydroxide batteries
  Estimated 65 hours with lithium iron disulfide batteries
• Operating Temp Range: 4 to +122 degrees F (-20 to +50 degrees C)
• Operating Humidity Range: 0-90% non-condensing