Sonitus Audio Ferro Fluid (ferrofluid) 0.5ml
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Sonitus Audio
Sonitus Audio Ferro Fluid (ferrofluid) 0.5ml
for Speakers and Compression Drivers
Product Code: SONFF05 | Brand: Sonitus Audio
Sonitus Audio Ferro Fluid (ferrofluid) 0.5ml
£4.16 ex VAT
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£3.35 DELIVERY to mainland UK.
Sonitus Audio Ferro Fluid (ferrofluid) 0.5ml

Ferro fluid for compression driver voice coil gaps, ideal for replacing contaminated or dried ferro fluid. Supplied in a capped syringe with an applicator nozzle.

Ferrotec's APG S11N Ferrofluid is a member of Ferrotec's family of APG S Series ferrofluids for tweeter and compression driver applications. The APG S11N is a black-brown viscous fluid and uses a synthetic ester oil carrier liquid. Manufactured by Ferrotec in Tokyo, Japan. We purchase this in 1000ml bottles, and then make up individual 0.5ml syringes in the UK.


  • Saturation Magnetization (Ms) 220 Gauss
  • Viscosity @27°C 85 cP
  • Density @25°C 1.15 g/cc
  • Pour Point -34 °C
  • Flash Point >200 °C
  • Thermal Conductivity @38°C 150 mW/(m.K)
  • Surface Tension @25°C 32 dynes/cm
  • Coefficient of Thermal Expansion 7.5 x 10-4 ml/ml°C

0.5ml of ferro fluid supplied, typically sufficient for approximately 1-2 small compression drivers, or 1 larger compression drivers.

Detailed specifications unavailable, please EMAIL the sales office for additional information.
Delivery Info for Sonitus Audio Ferro Fluid (ferrofluid) 0.5ml  to locations within the United Kingdom and Ireland
Delivery Info for Sonitus Audio Ferro Fluid (ferrofluid) 0.5ml  to locations in Europe

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