Since 1955, Gems Sensors has earned a solid reputation for accuracy and dependability in military marine and commercial marine services. Gems Sensors marine products are approved and qualified to MIL-L-23886, the military specification for fluid level
sensors. Other military qualifications include MIL-S-901C, Shock Test High Impact Shipboard Machinery, Equipment and Systems…MIL-STD-167, Mechanical Vibration of Shipboard Equipment Vibration...Inclination, Bureau Veritas, Lloyds, ABS and USCG.
Commercial vessel approvals include UL, CSA, and FM.
Gems Sensors marine sensors are built purposefully rugged to accommodate harsh conditions including turbulent liquids, liquids containing foreign material, liquid interfaces, high temperature and high-pressure fluids. Construction materials include bronze, 304 or 316 SS, Monel™ and copper-nickel alloys. Standard floats are of Buna N for oils, stainless steel for high temps, and Hycel (epoxy) for high pressures. Mounting flanges and electrical connections per Navy specifications are routine at Gems Sensors & Controls.
Military Marine and Defense
For many years, the U.S. Navy has relied on the consistent accuracy and dependability of Gems switches in virtually every type of vessel, from surface to undersea. Gems marine products are approved and qualified to MIL-L-23886, the military specification for fluid level sensors. Other military qualifications include MIL-S-901C, Shock Test High Impact Shipboard Machinery, Equipment and Systems, MIL-STD-167, Mechanical Vibration of Shipboard Equipment, Inclination, Bureau Veritas, Lloyds, ABS and USCG.
Gems MarineGrade™ products have earned wide acceptance in the commercial marine industry. Commercial vessel approvals include UL, CSA, and FM. Gems engineers are very familiar with and experienced in the various aspects of shipboard requirements. Producing qualified sensor products to meet custom designs has long been our regular practice. With literally hundreds of these service-proven units documented on approved drawings, the solution to your fluid indicating problem is very likely a "standard" for us.
Marine Tank Level Monitoring with 5000 Series Pressure Sensors
RLI-G – Ready to Serve Your Most Demanding Tank Level Applications!
Gems Receives New ABS Approvals & EU RO Mutual Recognition
- AFFF Tanks
- Auxiliary generator fuel tanks
- Ballast tanks
- Bilge level detection
- Bilges and Voids
- Coolant tanks
- Cooling systems
- Day tanks
- Deck flooding alarms
- Fuel oil storage tanks
- Gray water tanks
- High level alarms for closed loading
- Lube oil and lube sump tanks
- Potable water storage tanks
3100/3200 Series Pressure Transducers
3100/3200 Series Pressure Sensors feature all-stainless steel wetted parts, a broad selection of electrical and pressure connections and electrical outputs to allow stock configurations suitable for most applications without modification. 3200...
3600 Series Pressure Switch
3600 Series Electronic Pressure Switches are highly resistant to shock and vibration and feature no moving parts for reliability. These switches are ideal alternatives to electromechanical types in high cycle pressure applications, or when broad...
CAP-300 Capacitive Level Sensor
CAP-300 Series Capacitive Level Sensor is compact, low-maintenance and highly-durable sensor that tolerates coating, can be mounted in any position and is compatible with coolants making it the ideal OEM solution for power generation equipment,...
FS-200 Series Flow Switch
FS-200 Series Flow Switches offer accurate flow detection, with 1% repeatability, over a broad range of flow settings and port sizes. Its durable construction delivers long-life reliability in either water or oil. Generous flow paths keep pressure...
FS-550 Series Flow Switch
FS-550 Series Flow Switches sense liquid flow in either direction to monitor flow/no-flow conditions and are supplied in two paddle lengths. The paddle is trimmed during installation to permit switch actuation at the desired flow rate. As flow...
LS-2050 Single-Point Level Switch
LS-2050 Series Single-Point Level Switches solve the problem of point level sensing in tanks with inaccessible tops or bottoms, or at intermediate locations in larger tanks. Installation is through the tank side at the detection point. LS-2050...
LS-270 Single-Point Level Switch
LS-270 Series Single-Point Level Switches are small and lightweight and can be bracket-mounted to any convenient surface. They are extremely stable in non-static, highly contaminated liquids and ideal for use in oils and water. Slosh shielding...
LS-800 Multi-Point Level Switch
LS-800 Series Multi-Point Level Switch is capable of supporting larger, more buoyant floats, and is physically stronger than other metallic models for better reliability in contaminated or turbulent media. LS-800 offers SPST or SPDT switches, and...
163000 Visual Level Indicators
163000 Series Visual Level Receivers are digital bar graph receivers that improve the way you can visualize the data being received from your liquid level transmitters with an LED numeric readout that provides detailed quantification of tank...
RLI-G Guided Wave Radar Level Sensor
RLI-G Guided Wave Radar Level Sensor is a no-moving parts continuous level sensor with advanced radar level sensing technology for reliable performance in challenging marine and industrial tank level applications. The RLI-G Series Guided Wave...
SureSite® Level Indicators LED Suresite
LED SureSite® Level Indicators excel where zero and low-ambient light make visual indicators difficult to read. With bright,LED illuminated level indication these units not only provide all the benefits of a SureSite® visual level...
SureSite® Mini-Alloy Visual Level Gauges
SureSite® Mini-Alloy Visual Level Gauges are for use where space is tight and feature a diameter of only 1-1/4â€ (32 mm). They can replace existing,antiquated sight glasses for excellent external,visual liquid level indication and...
XLS-1 Ultrasonic Level Sensor
The XLS-1 Ultrasonic Level Sensor is Gems' rugged alternative to reed switch level sensors. They are compatible with water, water-based and hydrocarbon-based liquids, and are perfect for applications where foam and condensation may affect other...
XM-XT 800 Continuous Level TransmitterXM-800 Continuous Level Transmitter
These compact level transmitters feature the rugged durability of stainless steel or brass construction. The XM-800 series provides analog output, and can be combined with Gemsâ„¢ Digital Bargraph Display and Level Cube Receivers....
How Gems Sensors Provides Solutions for the Shipbuilding Industry
Achieving maximum efficiency in marine operations means minimizing maintenance and extending machine life - and that means applying some of the impressive, innovative devices used today for sensing pressure, level and flow. Learn more about...
Advanced electronics have combined with the latest CVD technology to produce pressure transducers that can be used in a wide range of marine applications. Learn more about sensing in marine applications.