Electrical & Instrumentation
Electrical & Instrumentation Services
Installation, calibration, and maintenance of oilfield electrical systems and instrumentation — keeping your production and safety systems performing at their best.
Service Overview
Full-Scope Electrical & Instrumentation Services
Sequential International provides comprehensive E&I services for production facilities, wellsites, and process plants across the oil and gas sector. Our certified E&I technicians work across all major control system platforms and field instrumentation brands.
From routine calibration of pressure transmitters to full facility E&I audits and SCADA system upgrades, we deliver quality workmanship that keeps your process control and safety systems reliable.
“Reliable instrumentation is the nervous system of any production facility — we keep it accurate, calibrated, and fully functional.”
What We Deliver
Scope of Work
Instrument Calibration
Calibration of pressure, temperature, flow, and level transmitters to OEM specifications using traceable standards.
SCADA & Control Systems
Installation, configuration, and maintenance of SCADA systems, PLCs, and DCS control platforms.
Electrical Installations
Certified installation of electrical systems, switchboards, distribution panels, and motor control centres.
Fire & Gas Systems
Installation, testing, and maintenance of fire and gas detection systems, including VESDA, heat, and gas detectors.
Ex / ATEX Equipment
Installation and maintenance of hazardous area (Zone 1 & 2) electrical and instrumentation equipment to IECEx standards.
E&I Audits
Comprehensive facility E&I audits identifying deficiencies, non-compliances, and improvement opportunities.
How We Work
Our Service Process
Scope Definition
Review of instrumentation datasheets, loop diagrams, and electrical single-line drawings.
Isolation & Permit
Formal electrical isolation, LOTO verification, and permit-to-work issuance before any live work.
Calibration / Installation
Certified calibration or installation executed to OEM and project specifications.
Loop Test & Handover
Full loop testing, function checks, and calibration certificates issued for client records.
Why Choose Us
Key Benefits
NUPRC Compliant
All E&I works comply with Nigerian upstream electrical codes and IEC international standards.
Hazardous Area Certified
Our technicians hold valid ATEX/IECEx competency for all Zone 1 and Zone 2 installations.
Calibrated & Traceable
All calibrations are performed with traceable standards and certified records issued.
Reduced Instrument Downtime
Preventive calibration programmes significantly reduce field instrument failures and process trips.
Safety System Integrity
Maintained F&G and ESD systems ensure your safety instrumented functions remain reliable.
Full E&I Audit Support
Our audit teams identify compliance gaps before regulators do — protecting your licence to operate.
All electrical work is conducted under a strict LOTO (Lockout/Tagout) regime. Hazardous area installations require valid ATEX/IECEx certification. No energised work is permitted without a formal live work permit and risk assessment.
Capabilities
Equipment & Capabilities
Calibration Standards
Multi-function calibrators, dead weight testers, and HART communicators — all traceable.
SCADA Platforms
Competence across Wonderware, Ignition, Siemens, ABB, and Rockwell SCADA/DCS systems.
Electrical Test Sets
Insulation resistance testers, earth bond testers, power quality analysers, and multimeters.
F&G Test Equipment
Calibrated gas simulators and IR source test tools for F&G detector function verification.
LOTO Equipment
Full lockout/tagout station with padlocks, hasp sets, and isolation tags for all electrical isolations.
Loop Diagram Support
As-built loop documentation and SLD updating service included with all E&I project deliveries.
Book an E&I Calibration or Audit
Keep your production facility's instrumentation and electrical systems compliant and reliable. Contact our E&I team for a scope review and commercial proposal.