Measured right.
Tested safe.

Instrument calibration, safety valve testing and turnaround support for plants across Pakistan.

Request a quote See what we calibrate
Pressure gauge settling on a reading of 10 bar Q Star bar
Reading 10.00 bar

Every reading accurate, traceable and on record.

Across Pakistan

Offices and field staff in Lahore, Multan, Karachi, Islamabad and Daharki.

ISO 9001:2015

Certified quality system covering PSV and control valve inspection and calibration of measuring devices.

Traceable

Reference standards traceable to recognised national laboratories.

Calibration lab.

Six parameters, calibrated against traceable references, with a certificate for every instrument.

Pressure

Gauges, transmitters, switches and test gauges, calibrated against traceable pressure references.

Temperature

Thermometers, RTDs, thermocouples and temperature transmitters.

Dimensional

Vernier calipers, micrometers, height gauges and other length instruments.

Torque

Torque wrenches and screwdrivers used in assembly and bolting.

Electrical

Current, voltage and resistance: multimeters, clamp meters and process calibrators.

Power

Power and energy meters and analysers used across plant electrical systems.

In our lab, or at your plant.

Portable pressure, temperature and process calibrators let us calibrate instruments where they're installed.

Book a calibration

Safety valves, tested to set pressure.

A pressure safety valve earns its keep on the one day it has to lift. We test, repair and certify PSVs and PRVs so that day goes to plan.

Offline bench testing
Set pressure and seat tightness checked on the test bench, with results recorded on the certificate.
Repair and parts
Disassembly, inspection, repair and reassembly, with replacement parts manufactured when originals aren't available.
Control valves
Repair, parts and testing for control valves, in our workshop or during your turnaround.

Planning a shutdown?

We handle instruments and safety valves during commissioning and turnarounds, so your team can focus on everything else.

Loop testing, flow and level transmitters, RTDs and control valves, using HART field communicators and process, pressure and temperature calibrators.

Plan your turnaround
  1. 1

    Site survey

    We walk the plant with your team and list every instrument, loop and valve in scope.

  2. 2

    Team mobilised

    Technicians and calibrated equipment arrive on site, scheduled around your shutdown plan.

  3. 3

    Test, calibrate, repair

    Instruments are calibrated and loops checked in place. Safety valves are bench tested and repaired.

  4. 4

    Certified and handed over

    Every item gets a certificate recording the results, ready for your records and auditors.

Work you can put in front of an auditor.

Every instrument leaves with a certificate that records what was measured, against which reference, and when it's next due.

Certified quality system

ISO 9001:2015 for industrial plant, PSV and control valve inspection, and calibration of measuring devices.

Traceability

Our reference standards are traceable to recognised national laboratories, and every certificate records the chain.

Vendor registration

Need our documents for your approved vendor list? Ask for our company profile.

Where precision is a safety issue.

We work with plants where a wrong reading costs more than time.

  • Oil, gas and drilling

    Wellsite and processing instruments, and PSVs on separators, compressors and lines.

  • Refineries and petrochemicals

    Large safety valve programmes and loop checks during turnarounds.

  • Fertilizer and chemical

    Pressure and temperature measurement in continuous, high-hazard processes.

  • Power and energy

    Boiler and steam safety valves, pressure and electrical instruments.

  • Manufacturing and engineering

    Dimensional and torque tools behind quality control and assembly.

  • Food and beverage

    Temperature and pressure instruments behind food safety records.

Close to site.

Offices and field staff in five cities mean shorter lead times for on-site work, including the plants of upper Sindh.

  • Lahore

    477-A Airline Housing Society, near Jamia Masjid

  • Multan

    House 839-C, Gulgasht Colony

  • Karachi

    Office and field staff

  • Islamabad

    Office and field staff

  • Daharki

    Office and field staff

Request a quote.

Tell us what needs calibrating or testing, and where. We'll come back with a quote and a schedule.

Where is the work?

We use your details only to prepare your quote. Have a long instrument list? Email it to info@qstar.com.pk and we'll work from that.