What Calgaz does

Calgaz is a privately held manufacturer of portable calibration gases, regulators, and related accessories, founded in 1976 in Cambridge, Maryland and now headquartered in Houston, Texas. The company precision-blends gas mixtures (including the proprietary 4-in-1 'Quad' mixture pioneered in 1991) and engineers matched regulators and transit accessories used to bump-test and calibrate gas detection instruments. Manufacturing is conducted in three ISO 9001 / 17025 facilities (Cambridge MD, Oldsmar FL, Stoke-on-Trent UK), with ISO 17034 reference material producer accreditation at its Cambridge site, and products carry NHTSA approval and NIST/CIPM MRA traceability for regulated end-uses.

The business serves industrial safety, marine, oil & gas (mudlogging), breath alcohol testing, and laboratory/analytical customers across more than 120 countries through six distribution hubs in Houston, Pearland, Rotterdam, Dubai, Singapore, and Shanghai. Pricing is quote-based with bespoke pricing schedules for repeat accounts; sales are executed through regional commercial teams, and the company ships specialized dangerous goods consignments under all major Incoterms. Calgaz is wholly owned by Air Liquide following the 2014 acquisition of a UK calibration gas supplier and the 2019 Airgas-led acquisition of Tech Air/Gasco, with all legacy product lines unified under the CALGAZ brand in 2026.

Revenue is generated primarily through sale of consumable gas cylinders (aluminium and steel, both refillable and ecosmart disposable) and complementary regulator hardware, with adjacent accessories and the ecosmart recycling program. Customer concentration is low, with no single logo dependency disclosed, and the model relies on regulated replacement cycles, ISO-accredited certified reference materials, and operational reach into 120+ countries.

Name

Calgaz

Legal name

Calgaz Ltd.

Website

https://calgaz.com

Company type

Private

Founded year

1976

Operating status

Operating

Headcount range

101–250 employees

Short description

Calgaz manufactures portable calibration gas mixtures, regulators, and accessories for gas detection equipment, serving industrial safety, marine, oil & gas, breath alcohol testing, and laboratory customers in 120+ countries as a wholly owned Air Liquide subsidiary.

Ownership category

akta.pro rank

Product category

Industrial Specialty Gases (Calibration Gases)

NAICS

Industrial Gas Manufacturing (32512), Industrial Gas Manufacturing (325120), Fluid Power Valve and Hose Fitting Manufacturing (332912)

SIC

Laboratory Analytical Instruments (3826), Industrial Instruments For Measurement, Display, And Control (3823)

akta.pro primary industry

Specialty & Calibration Gas Mixtures (IMAEACAE)

akta.pro secondary industries

Gas Handling Equipment & Storage (Cylinders/Tanks/Valves) (IMAEACAL), Chemical Standards & Calibration Solutions (Food Chemistry) (AFALAKAH)

Keywords

• Calibration gas mixtures
• Precision gas regulators
• Portable gas cylinders
• Breath alcohol standards
• Industrial safety gases

Headquarters

HQ city

Houston

HQ country

United States

HQ region

North America

Offices9 records

Markets served

GTM type

B2B

Offering type

Hardware or Manufacturing

Cost components

Supply Chain, Operations, Personnel, Marketing or Sales, Infrastructure

Revenue model

1. Calibration Gas Cylinders: Sale of portable and refillable gas cylinders for calibration purposes. Product lines include aluminum and steel cylinders in various sizes (1AL, 2AL, 8AL, 10AL, 5ELR, 6D, 6DM, 7HP, 7EOC, 65ALR, 65DA, 10L, 17L, 34L, 34LS, 58AL, 74L, 103L, 105L, 116L, 221L, 552L, 600L, HPC series) and ecosmart disposable cylinders (34ES, 44ES, 58ES, 66ES, 105ES, 116ES, 650ES).
2. Gas Regulators and Flow Control Devices: Sale of precision-engineered regulators including 700 Series (Fixed Flow), 800 Series (Variflow), 1000 Series (Fixed Pressure), 1700 Series (Single Stage), 2000 Series (Demand Flow), 3850 Push Button, 4200 Series (Trigger), FF20 Series, R Series (HPC), DFR, 74-DAF (Dial-a-Flow), 70 Series, 71, 72-MFV, 73-TPBR, 76-Q70, 76-Q71, CV-2, 75 Series, and Eco-Trigger Regulator.
3. Calibration Gas Accessories: Sale of essential support gear including heavy-duty carry cases, 584 Soft Case, application-specific tubing (PVC and Teflon-lined Tygon), and cylinder recycling tools.

Pricing tiers

Go-to-market motion2 records

Distribution channels2 records

Marketing channels3 records

Core offering

Calgaz manufactures precision-blended calibration gas mixtures and supplies them in portable aluminium and steel cylinders, refillable and disposable. The company also produces specialty gas delivery regulators, accessories (carry cases, tubing, recycling tools), and offers an ecosmart cylinder return/recycling program. All products are produced in ISO 9001, 17025 and 17034 accredited facilities and shipped to more than 120 countries across industrial safety, marine, oil and gas, breath alcohol testing, and laboratory markets.

Product overview

Calgaz is the world's most established provider of portable calibration gases, offering a comprehensive ecosystem of products comprising calibration gas cylinders (non-refillable and refillable aluminium and steel cylinders in various sizes including ES/Ecosmart series, L-series, HPC high-pressure cylinders, and standard industrial cylinders), precision-engineered regulators (including 700, 800, 1000, 1700, 2000, 3850, 4200, FF20, R Series, DFR, 70, 71, 72, 73, 74, 75, 76 series), and rugged accessories (carry cases, soft cases, specialized tubing, and recycling tools). The company operates as a one-stop-shop supplier where all products are designed to integrate perfectly together, providing complete calibration solutions for gas detection equipment across industrial safety, marine, oil and gas, breath alcohol testing, and laboratory markets.

Differentiator

Problem solved

Functional benefit

Brands

• ecosmart: Environmentally-friendly cylinder recycling program offering six ecosmart cylinder sizes and return options for used cylinders, reducing waste from empty cylinders. This is a US-based program.

Products and services

• Portable Aluminium and Steel Calibration Gas Cylinders Portable and refillable aluminium and steel cylinders in various sizes used to store and deliver precision-blended calibration gas mixtures to field technicians for daily bump testing and full calibration of gas detection equipment. Available in non-refillable (screw or trigger type) and refillable variants, with reactive and non-reactive mixture options and standard C10 or specialized CGA valves.
• High Pressure Cylinders (HPC) Specialized high-pressure refillable cylinders tailored for gas detection, marine, industrial safety, mud logging, and breath testing applications. Shipped globally from the Stoke-on-Trent plant, with R21 single-stage and R31 dual-stage regulators available.
• Eco-Bump Cylinders Compact quad-gas disposable cylinders designed for reactive quad mixtures, offering up to 12-month shelf life and up to 250 individual 3-second bump tests per cylinder for daily bump testing of multi-gas detectors.
• Ecosmart Disposable Cylinders Disposable aluminium cylinders offered in seven ecosmart sizes (34ES, 44ES, 58ES, 66ES, 105ES, 116ES, 650ES) that can be returned to Calgaz through the ecosmart cylinder recycling program, reducing waste from empty gas cylinders.
• Calibration Gas Regulators Precision-engineered gas flow regulators available in multiple series (700 Fixed Flow, 800 Variflow, 1000 Fixed Pressure, 1700 Single Stage, 2000 Demand Flow, 3850 Push Button, 4200 Trigger, FF20, R Series HPC, DFR Demand Flow, 70 Series, 71, 72-MFV, 73-TPBR, 74 DAF Dial-a-Flow, 75, 76-Q70/76-Q71, CV-2, Eco-Trigger) for controlled and adjustable delivery of calibration gas mixtures in brass or stainless steel construction.
• Calibration Gas Accessories Essential support gear including heavy-duty impact-resistant carry cases, hands-free 584 Soft Case for transporting up to three cylinders, application-specific tubing (PVC for non-reactive gases and Teflon-lined Tygon for reactive elements), and specialized tools for safe destruction of empty cylinder valves for local scrap metal recycling.
• ecosmart Returns and Recycling Program US-based environmentally-friendly return program for used ecosmart cylinders, including six ecosmart cylinder sizes, a specialized tool for safely destroying cylinder valves for local scrap metal recycling, and reverse logistics handling.
• Ethanol-in-Nitrogen Breath Alcohol Standards Premium ethanol-in-nitrogen Certified Reference Materials for calibrating breath alcohol testing instruments used by law enforcement agencies, commercial fleet operators, and ignition interlock providers. NHTSA-approved, recognized on the U.S. Federal Register's Conforming Products List, with up to 3-year shelf life.
• Quad Gas Mixtures (4-in-1) Pre-made 4-in-1 calibration gas mixtures combining Oxygen, Methane, Carbon Monoxide, and Hydrogen Sulfide in a single cylinder, replacing multiple separate gas cylinders for multi-gas detector calibration and reducing handling time, cost, and complexity.
• Custom Gas Mixtures Bespoke precision-blended calibration gas mixtures for specialized applications, including custom hydrocarbon blends (Methane, Ethane, Propane, Butane in varying ratios) for mudlogging sensors and other tailored analytical requirements, with technical and safety review completed within 1 working day before quotation.

Quantifiable outcome

• Up to 250 individual 3-second bump tests per Eco-Bump cylinder
• +3 more outcomes

Segments5 records

Ideal customer profiles5 records

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature4 records

Partnerships

One partnership is on record.

• Air LiquidecoreOthersCalgaz is owned by Air Liquide. Founded in Cambridge, Maryland in 1976 as an independent company. Air Liquide acquired the UK calibration gas business in 2014 and the Tech Air/Gasco division in 2019, integrating all operations under the CALGAZ brand as of 2026.

Scale indicators6 records

Recent moves8 records

Expansion highlights5 records

Direct peers

• Scott Specialty Gases (Air Liquide Scott): Direct internal peer within Air Liquide focused on specialty and calibration gas mixtures. Historically a primary competitor to Calgaz in the portable calibration gas market, now operating as part of the same parent organization with overlapping product portfolios.
• Linde Gas & Equipment: Linde offers HiQ specialty gas mixtures and calibration standards as part of its industrial gas portfolio. Direct competitor to Calgaz in portable calibration gases, serving the same industrial safety, laboratory, and breath alcohol end markets.
• Matheson Tri-Gas (Nippon Sanso Holdings): Matheson produces certified calibration gas mixtures, EPA protocol gases, and custom specialty gas blends for industrial hygiene, environmental, and laboratory markets. Comparable product lines and ISO 17034-accredited reference materials make it a direct competitor.

Broad incumbents

• Air Products and Chemicals: Air Products is one of the largest industrial gas majors and offers specialty calibration gas mixtures and BIP (built-in-purity) technology for analytical applications. Broader portfolio than Calgaz but overlapping in calibration/specialty gases.
• Messer Group: Messer is a privately held industrial gas company with a specialty gas calibration offering serving European and Americas markets. Family-controlled competitor comparable in scale and product breadth to Calgaz within Messer's specialty gases segment.

Emerging players

• Honeywell Analytics: Honeywell manufactures portable and fixed gas detection instruments (BW, ToxiPro, SPM). It is a major buyer of calibration gases for its detectors and offers bundled calibration solutions, creating partial overlap and customer/supplier dynamic with Calgaz.
• Dräger Safety: Dräger produces portable gas detectors (X-am, Pac series) and breath alcohol testing instruments, and is both a major customer for calibration gas mixtures and a competitor offering its own calibration ecosystem in some regions.
• MSA Safety: MSA Safety manufactures portable gas detection instruments (Altair, Galaxy) and ALTAIR 5X, and competes with Calgaz both as a buyer of calibration gases and through bundled calibration solutions in industrial safety markets.
• Industrial Scientific: Industrial Scientific produces gas detection equipment (Ventis Pro, Radius) and iNet calibration services. It is both a customer for calibration gas cylinders and a competitor through its calibration-as-a-service model.

Regional players

• Gastec Corporation: Japanese manufacturer of gas detector tubes and calibration equipment serving primarily APAC markets. Comparable calibration technology focus and product category, with limited direct overlap in Western markets where Calgaz is strongest.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat6 records

Key risks5 records

Key highlights7 records

Customer concentration

• LinkedInlinkedin.com/company/calgaz-gasco

Compliance6 records

Revenue estimate

Valuation estimate

Number of profiles

Funding overview

Funding rounds

Investors

Funding detail is available on the Subscription and Enterprise plan.Contact sales →

M&A

Investments

M&A and investment is available on the Subscription and Enterprise plan.Contact sales →

Frequently asked questions about Calgaz