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pcg@tulsa:~$ ./status --check
ISA Certified ............. [OK]
IEC 61511 SIS ............. [OK]
SCADA Systems ............. [ACTIVE]
Field Instrumentation ..... [READY]

Instrumentation &
Controls Specialists
for

SCADA systems, field instrumentation, control panel fabrication, and calibration services — built by specialists who understand your process, not just your wiring.

// Live Status
15+Years Active
ISA CAPCertified
CCSTTechnicians
24/7Support
OK + TXService Area
SIL-2SIS Rated
// Services

Instrumentation & Controls
Built for Your Process

Field technician with PPE inspecting instruments

Field Instrumentation

Pressure, temperature, flow, and level measurement — installation, hook-up, and commissioning for all major OEM instruments. We work to your P&IDs and instrument index from day one — no hand-holding required.

Pressure transmitters, gauges, switches
Temperature elements, thermowells, RTDs
Flow meters — Coriolis, magnetic, vortex, orifice
Level instruments — guided wave, radar, DP
All installations to IEC 60079 hazardous area requirements
SCADA / DCS ARCHITECTURE PT / TT Field Instr. FT / LT Flow / Level CV / MV Control Valve RTU Remote I/O SIS Safety SIL-2 PLC / DCS Rockwell / Siemens FIELD LEVEL MODBUS TCP / PROFINET / OPC-UA SCADA LEVEL SCADA SERVER Ignition / Wonderware 10,000+ TAGS HMI Operator Interface CONTROL ROOM HISTORIAN OSIsoft PI Data archiving ERP / MES SAP Integration Production KPIs Protocols: HART · Foundation Fieldbus · PROFIBUS · Modbus RTU/TCP · DNP3 · IEC 61850

SCADA & DCS Systems

System integration, PLC/DCS programming, HMI development, and legacy system upgrades. We work with all major platforms — Honeywell, Emerson, Yokogawa, Rockwell, Siemens — and build systems your operators can actually use.

SCADA system design and integration
DCS configuration and programming
HMI development and operator interface design
Legacy system migration and upgrade
OPC-UA and Modbus protocol integration
Control panel fabrication wiring

Control Panel Fabrication

UL 508A listed panel shop — custom design and build for any application. From simple junction boxes to complex MCC panels with integrated PLC, HMI, and communications. Every panel tested and documented before leaving our shop.

UL 508A listed fabrication facility
PLC, HMI, VFD, and relay logic panels
Remote I/O and marshalling cabinets
Full factory acceptance testing (FAT)
Complete as-built documentation package
Instrument calibration field work

Instrument Calibration

NIST-traceable calibration for all instrument types — on-site or in our calibration lab. Scheduled calibration programs, as-found/as-left reporting, and full calibration database management. ISA 5.1 compliant documentation on every job.

NIST-traceable calibration standards
On-site and in-lab calibration capability
Pressure, temperature, flow, and electrical
Scheduled PM programs with full records
As-found / as-left reporting with certificates
IEC 61511 SAFETY LIFECYCLE SAFETY LIFECYCLE IEC 61511 01 HAZARD ASSESSMENT HAZOP / LOPA / Risk matrix 02 SIL TARGET SIL 1 / 2 / 3 determination 03 SIS DESIGN Logic / sensors / finals 04 INSTALLATION FAT / SAT / commissioning 05 PROOF TEST Validation / SIL verify 06 OPERATION Maintain / MOC / audit 07 DECOMMISSION End of life / replacement SIL-2 CERTIFIED

Safety Instrumented Systems

SIL-rated SIS design, installation, and proof testing to IEC 61511. From HAZOP/LOPA support through final validation — we have the functional safety engineering capability to get your SIS from concept to certified.

IEC 61511 SIS design and engineering
SIL verification and validation
SIS installation and proof testing
HAZOP / LOPA participation
Safety lifecycle management
LOOP CHECK PROCESS PT FIELD INSTRUMENT 4-20mA / HART signal JUNCTION BOX & CABLING Marshalling / termination verified DCS / PLC INPUT CARD I/O module verified reading HMI DISPLAY Confirmed LOOP CHECK DOCUMENTATION As-found / as-left values recorded · Deviation noted · Sign-off by engineer and operator RESULT: ✓ PASS — Loop 101-PT-001 verified end-to-end STEP 01 STEP 02 STEP 03 STEP 04 Standards: ISA-5.1 · IEC 61511 · ISA-TR84 · Client loop check procedures

Loop Checking & Commissioning

Full loop checks, functional testing, and site acceptance testing for new installations and modifications. We work to your punch lists and deliver clean, signed-off documentation that your operations team can trust.

End-to-end loop check and verification
Functional testing to approved procedures
Site acceptance testing (SAT) support
Punch list management and closeout
Complete commissioning dossier package
SCADA control room screens
Field technician with PPE
Industrial instrumentation
// Who We Are

We Speak Instrumentation.

Precision Controls Group has served Tulsa's oil and gas sector for 15 years. Our ISA-certified instrument technicians and control systems engineers don't need the process explained — we've already read the P&IDs.

Every engineer on our team understands loop diagrams, cause-and-effect charts, and the difference between a trip and an alarm. That's not common. It's what makes us different.

ISACAP Certified
SIL-2SIS Rated
UL508A Listed
// Project Experience

Representative Project History

01 Refinery SCADA Upgrade — Oklahoma City, OK SCADA / DCS +

Full migration of legacy SCADA system to modern Ignition platform — 1,200 I/O points, 45 PLC racks, 12 operator workstations. Project delivered on schedule during a planned 3-week turnaround window with zero production impact.

Scope: SCADA Migration
Platform: Ignition / Rockwell
Duration: 18 months
02 SIS Design & Installation — Permian Basin Gas Plant Safety Systems +

IEC 61511 compliant SIS design for natural gas processing facility — 24 safety functions, SIL-2 rated, with full HAZOP support, engineering, installation, and proof testing through to final validation certificate.

Scope: Full SIS Lifecycle
Rating: SIL-2
Standard: IEC 61511
03 Instrument Calibration Program — Tulsa Refinery Calibration +

Ongoing annual calibration program — 3,200 instruments across 6 process units. NIST-traceable, full as-found/as-left records, and integration with client's asset management system. Program running continuously for 6 years.

Instruments: 3,200+
Frequency: Annual
Duration: Ongoing 6 years
04 Control Panel Fabrication — Power Generation Facility Panel Fab +

48 custom control panels — MCC, PLC, remote I/O, and marshalling cabinets. UL 508A fabrication, full FAT at our shop, site installation, loop checking, and SAT. Delivered on budget with zero rework after FAT.

Panels: 48 units
Listed: UL 508A
Result: Zero FAT rework
// Credentials

Qualified for Industrial Controls Work

ISA
CAP Certified
Certified Automation Professional
CCST
ISA Technician
Certified Control Systems Technician
IEC
61511 Functional Safety
SIS Functional Safety Engineering
UL
508A Listed Shop
Industrial Control Panel Fabrication
NIST
Traceable Calibration
Accredited Calibration Laboratory
ISN
ISNetworld Approved
Pre-qualified Contractor Status
// Get in Touch

Ready to Discuss
Your Controls Project?

Our instrumentation and controls engineers respond to all technical enquiries within one business day. Tell us your process — we'll take it from there.

Office1205 Energy Drive, Tulsa, OK 74103
Phone(918) 555-0163
Emailinfo@precisioncontrolsgroup.com
HoursMon–Fri 7:00 AM – 5:30 PM CST

Service Area: Oklahoma, Texas Panhandle, Permian Basin, Gulf Coast

// Send Project Enquiry

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