Quick Answer
Prism Calibration Centre (NABL CC-2480) provides calibration for Gujarat's chemical industry including pressure instruments (0–700 bar), temperature (RTDs, thermocouples), flow meters, pH/DO/conductivity analysers, weight systems, and safety relief valves — all with NABL-accredited certificates for GPCB, ISO 9001, and REACH compliance.
Key Takeaways
- Chemical process safety depends on calibrated pressure and temperature instruments.
- GPCB compliance monitoring (stack gas, effluent) requires NABL-calibrated analytical instruments.
- Corrosive media calibration: Prism calibrates instruments in contact with acids, alkalis, and solvents.
- ATEX/flameproof instrument calibration available for hazardous area process plants.
- API bulk drug plants in Gujarat require Schedule M + ICH calibration compliance.
Key Instruments Calibrated for Chemical Plants
- Pressure gauges and transmitters (reactor, column, vessel pressure)
- Temperature sensors (reactor temperature, distillation column, heat exchanger)
- Flow meters (raw material input, product output, effluent monitoring)
- pH meters and analysers (reaction control, neutralisation, effluent pH)
- Dissolved oxygen meters (fermentation, ETP aeration)
- Conductivity meters (water quality, ionic concentration)
- Gas analysers (H₂S, NH₃, SO₂, CO₂ — GPCB stack emission monitoring)
- Weighing systems (batch weighing, raw material dispensing)
- Safety relief valves (set pressure verification)
- Viscometers (product quality control)
GPCB Compliance — Calibration Requirements for Chemical Plants
Gujarat Pollution Control Board (GPCB) mandates continuous online monitoring systems (OCEMS) for large chemical plants, including stack gas analysers (SO₂, NOx, PM) and effluent monitoring (pH, COD, flow). All OCEMS instruments must be calibrated using certified reference gas standards and NABL-calibrated reference instruments. Prism provides NABL calibration for all GPCB-mandated monitoring instruments.
Process Safety Calibration for Chemical Plants
Safety Instrument Calibration
Safety-instrumented systems (SIS) in chemical plants include pressure safety valves, high-pressure trips, temperature high-high trips, and gas leak detectors. All SIS instruments must be calibrated as part of Functional Safety Management (IEC 61511). Prism provides NABL calibration for safety-instrumented system components.
Frequently Asked Questions
Can Prism calibrate instruments used in hazardous (ATEX Zone) areas?
Yes. Prism calibrates ATEX-certified instruments (flameproof, intrinsically safe types) used in hazardous zones. Our engineers are trained to handle intrinsically safe calibration equipment for Zone 1 and Zone 2 areas.
Does Prism calibrate safety relief valves for chemical plants?
Yes. Prism can verify the set pressure of safety relief valves (SRVs) using calibrated dead weight testers and test rigs. SRV calibration per API 520/521/526 is available.
Is Prism's calibration accepted for GPCB consent renewal inspections?
Yes. GPCB accepts NABL-calibrated instrument data for consent renewal, environmental audit submissions, and online emission/effluent monitoring system (OCEMS) verification.
Can Prism calibrate corrosion-resistant pressure instruments (Hastelloy, PTFE)?
Yes. Prism calibrates pressure instruments with corrosion-resistant wetted parts (Hastelloy C-276, PTFE-lined, ceramic) using appropriate pressure connections and fittings.
How does Prism handle calibration of instruments containing hazardous media?
Instruments must be de-pressurised, purged, and cleaned before calibration. Prism provides calibration for 'clean' instruments only. For instruments that cannot be fully purged, on-site calibration with appropriate PPE is available.
Written by
Er. Parthiv Kinariwala
Managing Director · Prism Calibration Centre · NABL CC-2480 · Ahmedabad
Er. Parthiv Kinariwala founded Prism Calibration Centre in 2004 and has over 20 years of hands-on experience in calibration engineering, NABL accreditation, and industrial compliance. His team performs 10,000+ calibrations annually from the Vatva GIDC laboratory, serving 5000+ industries across Gujarat.
Prism Calibration Centre — Vatva GIDC, Ahmedabad
Prism Calibration Centre
F-101, Rudraksh Complex 2, Phase 3, GIDC Vatva, Near Jasoda Nagar Cross Road, Ahmedabad — 382445, Gujarat, India
Phone: +91 98245 26444
Email: info@prismcalibration.com
NABL: CC-2480 · ISO/IEC 17025:2017
Hours: Mon–Sat, 9:00 AM – 7:00 PM