Supporting Reliable Chemical Delivery, Asset Protection, and Safe Operations for Chemical Injection Skids and Adjacent Oil & Gas Applications
Chemical injection skids are a critical part of onshore oil and gas operations, supporting corrosion prevention, scale inhibition, hydrate control, microbial treatment, and produced water conditioning. While the final injection point may operate at extremely low flow rates, reliable chemical treatment depends on monitoring the broader system, from storage and transfer to pressure verification and leak detection.
These systems commonly include chemical storage tanks, transfer piping, injection pumps, dilution circuits, and safety containment features, each with different sensing requirements. In many applications, monitoring pressure, level, flow presence, and leaks provides more practical operational insight than attempting to directly meter ultra-low injection rates.
Gems Sensors & Controls offers a practical portfolio of level, pressure, flow, and leak detection technologies that align well with chemical injection skids and adjacent oil and gas applications, particularly in onshore upstream, midstream pipeline support, and produced water environments.
Chemical Storage and Inventory Monitoring
Chemical availability and inventory awareness are essential for preventing pump run-dry conditions, missed treatments, and unnecessary site visits.
Common Monitoring Requirements
- Continuous or point-level indication in day tanks and bulk tanks
- High - and low-level alarms for refill notification and safety interlocks
- Compatibility with corrosive, coating, or aggressive chemicals
Practical Sensing Approaches
The UCL-510 Ultrasonic Level Sensor provides non-contact continuous level measurement for chemical tanks where wetted sensors may be undesirable. This approach is particularly useful for aggressive or coating chemicals that can affect traditional contact-based sensing technologies.
For point-level detection, the XLS-1 Ultrasonic Level Sensor offers an all-stainless-steel ultrasonic sensing solution for high- or low-level indication. Its compact design and ultrasonic sensing technology make it well-suited for challenging chemical service applications.
The LS-52100 Series Level Switch and LS-800 Series Multi-Point Level Switch are commonly used for pump activation, refill alarms, and redundant safety layers within chemical injection skid designs.
These devices support inventory management and pump protection while remaining isolated from the high-pressure injection side of the system.
Injection Pump Discharge and Line Condition Monitoring
In ultra-low-flow chemical injection systems, pressure is often the most reliable indicator of system health. Monitoring discharge pressure can provide early warning of blocked lines, loss of prime conditions, or abnormal pump behavior.
Common Monitoring Requirements
- High-pressure measurement at pump discharge or injection headers
- Rugged construction for cyclic pressure and harsh operating environments
- Compact integration into skid-mounted systems
Applicable Gems Technologies
The 3100 Series Pressure Transducer and 3200 Series Pressure Transducer are commonly applied at chemical injection pump discharge points to monitor line integrity and injection system performance.
Relevant features include:
- Stainless steel wetted parts
- High-pressure capability (up to 30,000 PSI)
- Compact OEM-friendly designs
- Multiple electrical output options
Rather than attempting to directly meter extremely low injection rates, pressure tranding often provides operators with a more practical indication that injection is occurring as intended.
Flow Verification and Equipment Protection
Many chemical injection skids require confirmation that flow is present rather than precise flow measurement. This is especially common in tranfer lines, dilution systems, and auxiliary support circuits.
Common Monitoring Requirements
• Flow/no-flow indication
• Pump protection
• Simple, rugged instrumentation
Common Instrumentation Choices
The FS Series Flow Switches are frequently used to confirm flow presence,
protect pumps, and provide basic operational verification in chemical transfer
and dilution systems.
Typical installation points include:
- Chemical transfer lines
- Dilution water circuits
- Pump discharge recirculation loops
- Auxiliary cooling or flushing lines
Flow switches are often a practical alternative when simple flow confirmation is more important than precise flow measurement.
Mid- to High-Flow Chemical Applications
Not all chemical-related processes operate at ultra-low flow rates. Applications such as drag-reducing agent (DRA) systems, produced water treatment, batching operations, and chemical dilution skids often involve higher and more stable liquid flow conditions.
Common Monitoring Requirements
- Measurement of carrier or bulk liquid flow
- Retrofit capability without cutting pipe
- Minimal pressure drop and maintenance
Applicable Gems Technologies
The XFT Clamp-On Ultrasonic Flow Meter is a non-intrusive flow meter designed for mid- to high-flow liquid applications commonly found in:
- DRA injection systems
- Produced water chemical treatment
- Chemical batching and blending systems
- Transfer and dilution skids
Clamp-on ultrasonic technology allows flow measurement without process interruption or pipe penetration, reducing installation complexity in pipeline and water handling systems.
Leak Detection and Secondary Containment Monitoring
Chemical leaks present environmental, maintenance, and operational risks. Early leak detection can reduce cleanup costs, minimize downtime, and improve site safety.
Common Monitoring Requirements
- Reliable leak detection in skid environments
- Compatibility with drip trays and secondary containment systems
- Simple alarm integration into PLC or remote monitoring systems
Practical sensor options
The LS-10 Leak Detection Switch is commonly installed in drip trays, containment
pans, and skid bases to provide early indication of leaks from pumps, tubing, or fittings.
Its compact form factor and straightforward switching output make it easy to integrate into chemical injection skid safety systems.
Hazardous Area Considerations
Chemical injection skids are frequently installed in Class I Division 2 or Zone 2 environments, particularly in upstream production and midstream pipeline operations.
Depending on the site classification and skid architecture,
Instrumentation may be implemented using:
- Appropriately rated hazardous area devices, or
- Intrinsically safe system architectures utilizing barriers or isolators
In many installations, locating electronics within non-hazardous control panels while using low-energy field instrumentation helps balance safety, simplicity, and overall system cost.
Practical Takeaway
Although the final injection point may operate at extremely low flow rates, reliable chemical treatment depends on sensing across the broader system, from storage and transfer to pressure verification and leak detection.
By selecting the appropriate sensing technology for each function, EPCs, skid OEMs, and operations teams can improve uptime, simplify maintenance, and maintain confidence that chemical injection systems are operating as intended.
For assistance reviewing a chemical injection skid application or selecting appropriate sensing technologies, connect with a Gems application specialist to discuss your system requirements.
