SALINOMETER DS-20
Alfa Lavel
Refurbished
The Alfa Laval Salinometer DS-20 is a highly reliable marine salinity monitoring system designed to continuously measure the salt content of fresh water produced by shipboard freshwater generators and evaporators. The DS-20 helps ensure that only high-quality fresh water is transferred to storage tanks or boiler feed water systems, protecting critical machinery and maintaining water quality standards onboard vessels. A salinometer measures salinity through conductivity measurement and provides alarms when salinity exceeds preset limits.
The equipment shown in the image includes the Alfa Laval DS-20 salinometer display units, widely used aboard commercial ships for monitoring distilled water quality. The system continuously analyzes water conductivity and converts the measurement into salinity values displayed in parts per million (PPM). When salinity exceeds acceptable limits, visual and audible alarms are activated, allowing engineers to take immediate corrective action.
Fresh water quality monitoring is essential on all vessels equipped with freshwater generators, evaporators, and boiler feed water systems. Salt contamination can cause severe corrosion, scaling, reduced heat transfer efficiency, and costly damage to boilers and auxiliary systems. The DS-20 provides an effective safeguard against such risks.
The Alfa Laval DS-20 is designed for continuous salinity measurement of distilled water produced by freshwater generators. The instrument utilizes conductivity-based measurement technology and automatically compensates for water temperature variations to maintain accurate readings. The DS-20 can display salinity levels from approximately 0.5 to 20 PPM and allows operators to set alarm thresholds according to vessel requirements.
The system generally consists of:
The DS-20 continuously receives conductivity signals from the electrode installed in the freshwater line. When salinity remains within acceptable limits, water is transferred normally. If contamination occurs, alarms activate and the system can be connected to automatic diversion valves that redirect unsuitable water away from freshwater storage tanks.
The salinometer plays a critical role in maintaining the quality of potable water and boiler feed water onboard ships.
The DS-20 continuously measures dissolved salt content in freshwater systems, providing real-time monitoring and protection against contamination.
Alarm thresholds can be configured according to vessel requirements, allowing engineers to establish acceptable salinity limits for different applications.
The instrument automatically compensates for water temperature variations to maintain accurate salinity measurements under changing operating conditions.
The front panel provides clear salinity indication in PPM, enabling rapid assessment of water quality by engine room personnel.
Built-in alarm relays allow integration with vessel alarm monitoring systems and automatic diversion valve controls.
The DS-20 is designed specifically for demanding marine environments where reliability and continuous operation are essential.
By preventing contaminated water from entering storage tanks, the system protects potable water supplies and boiler systems from salt contamination.
| Parameter | Specification |
|---|---|
| Product Name | Salinometer DS-20 |
| Manufacturer | Alfa Laval |
| Equipment Type | Salinity Monitoring System |
| Measurement Principle | Conductivity Measurement |
| Display Range | Approximately 0.5 – 20 PPM |
| Temperature Compensation | Automatic |
| Alarm Function | Adjustable Alarm Setpoint |
| Display Type | LED Dot Bar Display |
| Output | Alarm Relay Contacts |
| Application | Fresh Water Generator Monitoring |
| Installation | Engine Room / Control Panel |
| Industry | Marine Automation |
Technical specifications may vary depending on model revision and vessel installation configuration.
The Alfa Laval DS-20 is widely used onboard:
Monitoring distilled water quality produced by freshwater generators.
Protection of potable water systems and auxiliary machinery.
Continuous monitoring of freshwater production systems.
Ensuring high-quality freshwater availability for operational use.
Freshwater quality monitoring for crew and machinery requirements.
Protection against salt contamination within freshwater systems.
Water quality control for accommodation and machinery services.
Monitoring freshwater production for passenger consumption.
Maintaining high-quality distilled water supplies.
Freshwater generator monitoring and salinity control.
The DS-20 can be integrated with:
SM MARINE SERVICE™ supports sourcing and supply of:
Both replacement units and reconditioned equipment may be available depending on stock availability and customer requirements.
SM MARINE SERVICE™ provides professional repair and maintenance services for Alfa Laval Salinometer DS-20 systems.
Diagnosis of:
Professional repair of display units, sensor interfaces, power supplies, alarm circuits, and electronic control boards.
Verification and calibration of conductivity measurements to maintain accurate salinity monitoring.
Complete functional testing and performance verification.
Inspection, cleaning, refurbishment, component replacement, and operational validation.
Support may be available for:
Our engineers provide workshop repair services and onboard attendance for troubleshooting, calibration, commissioning, and annual maintenance.
SM MARINE SERVICE™
Bangladesh Office
Samir Market, DT Road, Pahartali, Beside CDA Market, Chattogram, Bangladesh
China Warehouse and Support Center
Shanghai, China
SM MARINE SERVICE™ supplies both New Equipment and Reconditioned Equipment depending on customer requirements and budget.
We provide worldwide supply, sourcing, repair, calibration, technical support and spare parts services for marine automation, navigation, communication and marine electronic systems.
Website : https://www.smmarineservice.com
Email : info@smmarineservice.com
WhatsApp and Viber : +8801818929292
Marketing Contact: Nazmul Hasan Bhuiyan
Mobile WhatsApp and Viber : +8801730296909
The Alfa Laval Salinometer DS-20 is a proven marine salinity monitoring system that plays a vital role in maintaining freshwater quality onboard ships. With continuous conductivity monitoring, automatic temperature compensation, adjustable alarm settings, and dependable marine construction, the DS-20 provides reliable protection for freshwater generators, potable water systems, and boiler feed water installations.
For Alfa Laval Salinometer DS-20 supply, repair, calibration, troubleshooting, spare parts, technical documentation support, reconditioned equipment, onboard attendance, and worldwide marine services, contact SM MARINE SERVICE™ for professional marine automation and instrumentation support.
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