
Pressure Laboratory
Calibration of pressure gauges, digital pressure indicators, pressure transmitters, pressure switches, vacuum gauges, test gauges, and manometers.
View LabSANAS-ACCREDITED CALIBRATION, EST. 1989
HJR Microptic CC provides SANAS-accredited and traceable calibration services across South Africa through our network of specialist laboratories and regional branches.
Introduction



HJR Microptic CC has been providing professional calibration services to industries throughout South Africa since 1989. Our commitment to accuracy, quality, reliability, and customer service has established us as a trusted partner across manufacturing, engineering, mining, petrochemical, food processing, healthcare, and many other industries.
Through our specialised laboratories, experienced technicians, and quality management systems, we deliver both SANAS-accredited and traceable calibration services that help our customers maintain compliance, quality, and operational confidence.
Our mission is simple: To provide accurate, reliable, and professional calibration solutions that our customers can depend on.
View Calibration ServicesOur Calibration Laboratories
Pressure, Force & Torque, DCLF, Dimensional, and Mass calibration disciplines supported by experienced technicians and quality management systems.

Calibration of pressure gauges, digital pressure indicators, pressure transmitters, pressure switches, vacuum gauges, test gauges, and manometers.
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Calibration of load cells, force gauges, torque wrenches, crane scales, pull testers, and related force and torque measuring instruments.
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Direct Current & Low Frequency
Calibration of multimeters, clamp meters, insulation testers, power supplies, process calibrators, and other DCLF instruments.
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Calibration of vernier calipers, micrometers, height gauges, dial indicators, bore gauges, and precision dimensional instruments.
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Calibration of precision balances, laboratory balances, industrial scales, platform scales, test weights, and analytical balances.
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HJR Microptic is a SANAS-accredited calibration laboratory, providing accredited calibrations within our approved scope of accreditation. In addition, we offer traceable calibration services for equipment outside our accredited scope where appropriate.
All calibrations are performed using standards that are regularly calibrated and linked through an unbroken chain of comparisons to national and internationally recognised measurement standards. This ensures measurement traceability, accuracy, and confidence in calibration results, whether an accredited certificate or a traceable calibration report is required.
Our customers benefit from calibration services that support quality management systems, regulatory requirements, and reliable measurement performance across a wide range of applications.


ISO/IEC 17025
Calibration laboratories operate under ISO/IEC 17025, the international standard for testing and calibration laboratories. Unlike ISO 9001, which focuses on general quality management, ISO/IEC 17025 assesses both the quality system and the technical competence of the laboratory, ensuring accurate, traceable, and reliable calibration results.
Calibration Services
HJR Microptic offers both on-site (in-house) and laboratory-based calibration services, allowing customers to choose the option that best suits their operational needs.

For equipment that is difficult to transport, forms part of a production process, or where downtime needs to be minimized, our qualified technicians can perform calibrations at your premises. This allows your equipment to remain on-site while ensuring compliance and measurement accuracy.
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Customers may also deliver their equipment to any of our branch offices or directly to our Head Office. The equipment will be calibrated in our controlled laboratory environment using accredited standards and specialised calibration equipment. Once completed, the equipment and calibration certificates will be returned to the customer.
Learn moreOur Branch Network
While HJR Microptic has established offices in key regions across South Africa, our calibration services are not limited to these areas. We proudly support customers throughout South Africa and across neighbouring countries, providing reliable calibration solutions wherever they are needed.
Request a Quotation
Our team is ready to assist with quotations, collections, technical advice, and calibration requirements.