Hydrophone buoyancy
| Density : | 0.39g/cm³ |
| Size : | φ400mm |
| Depth : | 1000m |
| Application Areas : | Hydrophone |
Whether in deep water or shallow water, the core function of the hydrophone buoyancy is to provide a stable buoyancy to keep it at the predetermined working depth and ensure stable posture. Therefore, an ideal buoyancy material usually needs to meet the following requirements:

Low density: Provides sufficient positive buoyancy.
Low water absorption: When working in water for a long time, the material absorbing water will cause an increase in weight and loss of buoyancy.
Corrosion resistance: Materials in seawater environments require good chemical corrosion resistance.
Sufficient mechanical strength: Can resist water flow impact and certain degrees of physical collisions.
The epoxy-based microsphere type solid buoyancy material of Rizhao Hejia is its core product, mainly composed of hollow glass microspheres and epoxy resin. This material has the characteristics of high strength, low density, and low water absorption rate, and is easy to process and shape. Its product line covers various depth ranges from the sea surface, shallow sea to full ocean depth.

Low density: Provides sufficient positive buoyancy.
Low water absorption: When working in water for a long time, the material absorbing water will cause an increase in weight and loss of buoyancy.
Corrosion resistance: Materials in seawater environments require good chemical corrosion resistance.
Sufficient mechanical strength: Can resist water flow impact and certain degrees of physical collisions.
The epoxy-based microsphere type solid buoyancy material of Rizhao Hejia is its core product, mainly composed of hollow glass microspheres and epoxy resin. This material has the characteristics of high strength, low density, and low water absorption rate, and is easy to process and shape. Its product line covers various depth ranges from the sea surface, shallow sea to full ocean depth.
| Microsphere buoyancy material performance table | |||||
| Item | Model | Density | Depth | Water absorption | Compressive strength |
| (g/cm³) | (m) | (24H) | (MPa) | ||
| Standard Performance Buoyancy | HJ-036 | 0.36±0.01 | ≤500 | ≤1% | ≥16 |
| HJ-038 | 0.38±0.01 | 800 | ≤1% | ≥21 | |
| HJ-043 | 0.43±0.02 | 1000 | ≤1% | ≥24 | |
| HJ-045 | 0.45±0.02 | 1500 | ≤1% | ≥28 | |
| HJ-051 | 0.51±0.02 | 3000 | ≤1% | ≥56 | |
| HJ-054 | 054±0.02 | 4000 | ≤1% | ≥60 | |
| HJ-058 | 0.58±0.02 | 5000 | ≤1% | ≥85 | |
| HJ-063 | 0.63±0.02 | 6000 | ≤1% | ≥110 | |
| High performance Buoyancy |
HJ42H | 0.42±0.01 | 1500 | ≤1% | ≥30 |
| HJ45H | 0.45±0.01 | 2000 | ≤1% | ≥35 | |
| HJ48H | 0.48±0.01 | 3000 | ≤1% | ≥50 | |
| HJ51H | 0.50±0.01 | 4000 | ≤1% | ≥60 | |
| HJ54H | 0.54±0.01 | 5000 | ≤1% | ≥80 | |
| HJ56H | 0.56±0.01 | 6000 | ≤1% | ≥96 | |
| HJ58H | 0.58±0.01 | 7000 | ≤1% | ≥112 | |
| HJ63H | 0.63±0.01 | 9000 | ≤1% | ≥140 | |
| HJ68H | 0.68±0.01 | 11500 | ≤1% | ≥170 | |