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T477W Bonding Meter

NSN 6625-01-119-7023

Rugged Reliability

  • The Avtron Aerospace T477W Bonding Meter is a self-contained AC resistance meter specifically designed to test very low resistance electrical bonds.  It is ideal for aircraft system bonding testing.
  • The unit is contained in an explosion-proof, protective casing Bonding Metercomplete with a pistol grip probe set and battery charger.
  • The low voltage and current output will not cause ignition of flammable gas.  Our Bonding Meter is certified by Underwriters Laboratories per UL 913, as an “Intrinsically Safe Apparatus, for use in Class I, II, and III, Division Hazardous Installation.”  The meter is also approved for use in environments containing hydrogen and gasoline flammable vapors.
  • For more information on the T477W Bonding Meter or to request a quote, please contact Avtron Aerospace Sales.

Prices are valid for domestic (U.S.) customers only.

Bonding Meter Accessories

Bonding Meter AccessoriesP/N C15480

Dual Compass Style



Bonding Meter AccessoriesP/N C15479

Two Pencil and Two Single Point Clamp Style



Bonding Meter AccessoriesP/N C15478

Compass and Dual Point Clamp Style





Bonding Meter AccessoriesP/N C16695

Four Pencil Style




Probe (pencil tip) Red (except pistol grip)P/N 367403

Probe (pencil tip) Red (all except pistol grip)



Probe (pencil tip) Black (all except pistol grip)P/N 367404

Probe (pencil tip) Black (all except pistol grip)

Probe Kit with 4 tips, 4 set screws, 1 wrench


P/N A25312

Probe Kit with 4 Tips, 4 Set Screws, 1 Wrench



Probe Contact AssemblyP/N 368065

Probe Contact Assembly (Biddle for C22161)


Pencil Tip Replacement



P/N 367089

Pencil Tip Replacement for 367403 & 367404



Battery Pack

P/N B14703

Battery Pack (~0.43 lbs / 6.8 oz)





Charging UnitP/N B15693

Charging Unit




Adapter Plug (European)P/N A14166

Adapter Plug (European)




Pistol Grip Probe CaseP/N 418608

Pistol Grip Probe Case (Top & Bottom Half)




t477w Bonding Meter Calibration

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