On a subsea well, every grain of sand you do not see can cost a choke, a jumper or a shutdown. The ClampOn Subsea Particle Monitor is a subsea sand monitor that measures produced sand in real time, so you can keep the well at its best safe rate.
According to ClampOn, its instruments run on thousands of wells every day, and the company is the largest supplier of sand monitoring systems worldwide. PT Saka Nusa Persada supplies the Subsea Particle Monitor and the matching subsea funnels in Indonesia as a ClampOn distributor. You can also read more at ClampOn.
How the Subsea Sand Monitor Works
The sensor sits just downstream of a bend, where the turbulent flow profile is fully developed. There, particles hit the inside of the pipe wall and create an ultrasonic signal. Onboard DSP analyzes that signal at 1 Hz, and the result travels through the Subsea Electronics Module to your topside control system. Moreover, the instrument can calculate sand rate internally, so no topside processing is needed.
Built for Deepwater Service
- One-atmosphere electronics chamber, so the electronics never see sea pressure.
- Electron-beam welded titanium body, so there are no gaskets or mechanical seals.
- Glass-metal penetrator, as well as optional redundant electronics.
- Rated to 3,048 m water depth, and moreover designed for a 25-year lifetime (220,000 hours MTBF).
- ROV deployable and retrievable, therefore retrofit and service work need no diver.
Subsea Funnels for Every Layout
ClampOn designs its carbon steel funnels in-house for the most common pipe sizes, and it can engineer others on request. The Standard funnel suits most jobs, including insulated pipe. The Bulkhead funnel allows cable entry from the top, while the Bend funnel mounts directly on a bend. Finally, an ROV can install the Retrofit funnel on lines that have no funnel yet.
Subsea Sand Monitor Specifications
| Technology | Passive ultrasonic, with DSP also inside the sensor |
| Minimum particle size | 25 µm in oil/water, 15 µm in gas (depending on flow) |
| Minimum sand rate | 0.01 g/s at a minimum flow velocity of 0.5 m/s |
| Repeatability | Better than 1% |
| Interfaces | RS-485, Modbus, CANbus and SIIS |
| Options | Onboard sand calculation and self-diagnostics, as well as vibration and temperature |
| Water depth | Up to 3,048 m |
| Housing and size | Titanium, ø90 × 324 mm, 7 kg in air |
| Power | 12–28 VDC, 1.2 W (single electronics) |
Specifications follow the ClampOn brochures (August 2022 and April 2024) and may change without notice.
For topside flowlines, see the ClampOn DSP Particle Monitor, and for vibration on the same sensor, see DSP vibration monitoring.
Explore the full ClampOn sensor range available in Indonesia through PT Saka Nusa Persada.
Developing a subsea field or adding sand monitoring to existing trees? Request a technical assessment We will coordinate sensors, funnels and integration with ClampOn.
