In hazardous environments where flammable gases, combustible dust, and extreme operating conditions are present, ensuring safe and reliable fluid monitoring is essential. Gems Sensors delivers FM-approved explosion-proof flow sensors and intrinsically safe system solutions that protect personnel, equipment, and processes across oil & gas, chemical processing, mining, wastewater, agriculture, hydrogen fuel systems, and more.
For decades, Gems Sensors has been a trusted industry partner, providing durable, safety-certified solutions that maintain operational efficiency while complying with stringent safety regulations in hazardous applications such as fuel transfer, lubrication systems, chemical dosing, cooling circuits, and hydrogen fuel distribution.

Explosion-Proof Flow Sensors vs. Intrinsically Safe Systems
Explosion-Proof (EP) Flow Sensors
EP sensors are designed to contain any internal explosion and prevent ignition of the surrounding environment. Certified for Class I, Division 1, Groups B, C, and D and Dust-Ignition proof for Class II/III, Division 1, Groups E, F, and G hazardous (classified) locations. These sensors are ideal for:
- Oil & Gas Processing – Monitoring fuel tank levels in refineries and storage facilities.
- Chemical & Petrochemical Plants – Ensuring safe level detection of volatile chemicals.
- Mining Operations – Providing reliable liquid level monitoring in fuel storage and cooling systems
Intrinsically Safe Flow System Solutions
Rather than relying on IS-certified sensors, Gems Sensors renders standard sensors intrinsically safe when paired with Warrick IS Controls, Safe-Pak® relays, and Zener barriers. These devices limit energy levels, ensuring safe operation in hazardous environments such as:
- Agriculture & Grain Handling – Preventing ignition in grain silos and fertilizer processing.
- Wastewater Treatment – Safeguarding chemical dosing and sludge level monitoring.
- Hydrogen Fuel Systems – Monitoring cryogenic hydrogen storage with Suresite® Visual Liquid Level Indicators equipped with transmitter and switch modules.
With both EP sensors and IS system solutions, Gems Sensors helps engineers meet regulatory requirements while optimizing safety and performance.
Industry Applications: Gems Flow Solutions for Hazardous Environments
- Fuel Transfer & Distribution – FS-200 & FS-925 ensure consistent fuel flow and leak detection.
- Compressor & Pump Protection – FS-400 & FS-550 monitor critical lubrication flow to prevent equipment failure.
- Pipeline Flow Monitoring – FS-926 & FS-930 provide accurate fuel flow detection in pipelines.
Chemical & Petrochemical Processing
- Cooling & Heat Exchanger Systems – FS-400 & FS-926 prevent overheating by ensuring proper coolant circulation.
- Solvent & Chemical Flow Control – FS-550 & FS-925 provide safe monitoring of flammable liquids.
- Reactor Process Flow Monitoring – FS-930 offers precise chemical flow detection in high-temperature processes.
Mining & Aggregates
- Lubrication & Hydraulic Fluid Monitoring – FS-930 ensures proper lubrication flow in heavy machinery.
- Dust Suppression & Water Systems – FS-200 maintains optimal water flow for dust control.
- Fuel System Protection – FS-550 & FS-400 monitor diesel fuel flow in mining vehicles.
- Chemical Dosing & Injection Systems – FS-400 regulates chemical flow to maintain water quality.
- Pumping Stations & Lift Stations – FS-200 protects pumps from dry-run conditions.
Agriculture & Grain Handling
- Irrigation & Spraying Systems – FS-400 ensures proper water and chemical flow for crop health.
- Dust Collection & Ventilation Systems – FS-200 prevents blockages by monitoring airflow and liquid flow.
Hydrogen Fuel Systems
- Electrolyzer Water Flow Management – FS-200 ensures precise water flow for hydrogen production.
- Fuel Cell Cooling & Circulation – FS-400 protects hydrogen fuel cell cooling systems.
- Cryogenic Hydrogen Storage & Transfer – FS-925 ensures safe fuel transfer and leak detection.
Why Gems Sensors? Built for Safety, Reliability & Compliance
Engineered for Extreme Conditions
Our explosion-proof sensors and intrinsically safe system solutions are designed with rugged materials ensuring durability in high-pressure, corrosive, and extreme-temperature environments.
Certified for Global Compliance
Gems Sensors’ EP and IS-compatible solutions meet stringent industry safety standards, including:
- FM Approved for hazardous locations.
- Class I, Division 1 & 2 (CID1, CID2) approvals for explosion-proof flow sensors
- CE, UL, CSA certifications ensuring worldwide acceptance
Intrinsically Safe System Solutions with Safe-Pak® Relays & Zener Barriers
Pairing Gems level sensors with Safe-Pak® relays and Zener barriers ensures:
- Safe, energy-limited operation in explosive atmospheres.
- Reliable signal transmission to control systems and PLCs.
- Compliance with hazardous location regulations.
By limiting energy at the source, Gems Sensors enables standard flow sensors to function safely in intrinsically safe environments without requiring full IS certification.
Partner with Gems Sensors for Hazardous Applications
For decades, Gems Sensors has been a trusted leader in hazardous location sensing solutions, helping industries enhance safety and reliability. Our FM-approved explosion-proof flow sensors and intrinsically safe system solutions provide precise, safety-certified performance in oil & gas, chemical processing, mining, wastewater, agriculture, and hydrogen fuel applications.
*Installation and maintenance of ALL Gems EP/IS products must be in accordance with the National Electrical Code and the applicable GEMS INSTRUCTION, INSTALLATION and SERVICE bulletins available at www.gemssensors.com