Flotation (Glass Spheres)
  • Transparent, lightweight, and cost effective
  • Can be fully utilized with our Hard Hats.
  • Corrosion resistant and lightweight.
  • Extremely durable.
  • Pressure tested to 6700 meters (10,000 psi).
Detailed Information Below

Flotation (Glass Spheres) Technical Specs

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Flotation (Glass Spheres)

Teledyne Benthos’ patented vacuum sealed glass floats and instrument housings are manufactured from precision-molded spheres to exact specifications. The edge of each hemisphere is ground flat to extreme tolerances. When used for flotation our hemispheres are matched, mated, and then evacuated to an absolute internal air pressure of less than 0.3 atmospheres. After evacuation, a sealant and protective tape are applied around the equator. Spheres sealed in this method are nearly impossible to open due to the force exerted upon them by the atmospheric pressure. In the case of the 43.2 cm (17 in) diameter float, this force is in excess of 880 kg (2000 lbs).

(C-204-41) 2040-13V; Glass Flotation Sphere - 13”

(C-204-42) 2040-17V; Glass Flotation Sphere - 17”

Specification Description
TYPE

Low expansion borosilicate

THERMAL COEFFICIENT OF EXPANSION 38x10-7/°C
SPECIFIC GRAVITY

​2.22

YOUNG'S MODULUS 62 GPa (9x106 P.S.I.)
POISSON'S RATIO

​0.20

REFRACTIVE INDEX 1.48
THERMAL CONDUCTIVITY 0.0023 calorie cm/cm2 sec°C
SPECIFIC HEAT 0.18 calorie/g°C
DIMENSIONS, WEIGHT, AND DEPTH DATA: SPHERE MODEL 2040-13V*
  • Outside Diameter:  33 cm (13 in)
  • Inside Diameter:  30.5 cm (12 in)
  • Weight in Air:  9.07 kg (20 lbs)
  • Net Buoyancy:  10.4 kg (23 lbs)
  • Depth Rating;  9000 m (29,500 ft)

*13" spheres available with improved optical transmission profiles, low potassium and low photonic radiation

DIMENSIONS, WEIGHT, AND DEPTH DATA: SPHERE MODEL 2040-17V
  • Outside Diameter: 43.2 cm (17 in)
  • Inside Diameter: 40.4 cm (15.9 in)
  • Weight in Air: 17.7 kg (39 lbs)
  • Net Buoyancy: 25.4 kg (56 lbs)
  • Depth Rating; 6700 m (22,000 ft)
  • ​Flotation housing
  • Mooring recovery
Teledyne Benthos / 49 Edgerton Drive North Falmouth, MA 02556 USA / ISO 9001 Certificate / Terms and Conditions
Phone: (508) 563-1000 / Fax: (508) 563-6444
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