Calgaz began as a Cambridge, Maryland, company in 1976 and became an Air Liquide-owned business after pioneering the calibration-gas market. Its development of the four-gas “Quad” mixture in 1991 helped simplify instrument testing, and the company now supports safety-critical users worldwide through three manufacturing sites. Calgaz’s quality system includes ISO 9001, ISO/IEC 17025, and ISO 17034 accreditations.
ISO 9001:2015
ISO/IEC 17025:2017
ISO 17034:2016
ISO 11118 Approval
NHTSA Conforming Products List
Compliance program
NIST CIPM MRA Traceability
Compliance program
ISO17025
Quality certification
SpecGas IncFounded in 2001 by research chemist Alfred Boehm, Warminster-based SpecGas Inc. blends precision specialty and calibration gases for equipment testing, research, monitoring and manufacturing. The family-run company develops stable low-ppm and ppb mixtures in-house, including difficult reactive blends, using proprietary cylinder-treatment and blending techniques. Its custom mixtures can be produced to customer specifications and are directly traceable to NIST standards for university and research laboratories.325120WARMINSTER, PA
SensorconFounded in 2003, Sensorcon has built its name around portable gas monitoring for people who need quick, dependable awareness of hazardous exposure. From its Buffalo, New York facility, the company makes and tests its Inspector sensors for professional users, while its ISO 9001:2015 certification reflects the quality system behind that work. Sensorcon also keeps its instruments in service through calibration and factory renewal programs.BUFFALO, NY
Aalborg Instruments & Controls, IncFounded in 1972, Aalborg Instruments & Controls manufactures precision instruments for measuring and controlling gas flow, from thermal mass flow controllers to variable-area rotameters and valves. Its two-division operation also supports flow calibration, including NIST-traceable work and A2LA-accredited gas calibrations through the AALFA-KAL metrology laboratory. Aalborg has maintained ISO 9001 certification since 1995.ORANGEBURG, NY
Teledyne Analytical InstrumentsFounded in 1964, Teledyne Analytical Instruments is a California manufacturer focused on analytical measurement solutions for industrial and other demanding applications. Its work includes gas analyzers and custom integrated systems, including hazardous-area equipment designed to meet NEC, ATEX, and IECEx requirements.LEWISBURG, WV