Gas Sampling.
Air Sampling.
Liquid Sampling.
Soil Sampling.

We have a bag for that!

Use Cali-5-Bond multi layer foil Sampling Bags for ALL your testing needs.

Gas Sampling Bags Cali-5-Bond

Custom Made

Our Cali-5-Bond™ gas, air, liquid and soil sampling bags are multi-layer foil bags made to order with standard and custom sizing and valve options to fit your specifications based on application and testing requirements. They provide moisture and light protection and are the only gas sample bags suitable for low molecular weight compounds such as methane, CO, CO2, and hydrogen sulfide. Also suitable for permanent gases such as hydrogen and oxygen. Unlike our Cali-5-Bond™ bags, these compounds can become unstable when collected into standard Tedlar® bags*.

Cali-5-Bond™ gas sampling bags are frequently used to store and transport calibration gases and gas standards. Gas sampling bags are exclusively used for several EPA, NIOSH, and OSHA methods. Check out all of our custom options!

Technically Superior

Our Cali-5-Bond™ gas, air, liquid and soil sampling bags are used in multiple industries because of their superior construction, versatility and reliability.

In contrast to other single or multi-layer plastic materials currently in use, polymer Cali-5-Bond™ multi-layer foil gas, air, liquid and soil sampling bags are made by a patented production process. The process bonds multiple layers of material together into a single flexible sheet 5 mil (0.14 mm) thick.

The absolute barrier to air, gas or liquid permeation is a layer of aluminum foil, a proprietary formulation of HDPE forms the totally inert and non-reactive inner liner (wetted surface).


Cost Effective

Multi-layer foil sampling bags can be a cost-effective alternative to canisters and tubes and are appropriate for many applications. Among the advantages offered by Cali-5-Bond™ bags over conventional sampling vessels (glass or metal containers) are their ease of use, even in hard-to-reach locations, low cost, and the trouble-free way they can be transported. Cali-5-Bond™ gas, air, liquid and soil sampling bags may also be re-used in many applications.Cali-5-Bond™ foil gas sampling bags are frequently used to store and transport calibration gases and gas standards. Gas sampling bags are exclusively used for several EPA, NIOSH, and OSHA methods.

Cali-5-Bond™ multi-layer foil sampling bags provide a simple, reliable and economic method of collecting air, gas and liquid samples from any collection point and transporting them to a centrally located test instrument or remote laboratory for final analysis.

Helium One Explains How They Use the Cali-5-Bond™ for Helium Gas Sampling
What our Customers think of the Cali-5-Bond™ Liquid, Air, Soil, and Gas Sampling Bags
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We’ve Used Cali-5-Bond Bags For Years

Actually, I have already been a good sales rep for Calibrated: over the years I have directed a lot of people to your web and sample bags. The last order you got from ANSTO was from my colleagues here, at my bequest. Indeed, over the last week I have had two separate inquiries from people who want gas analysed at our laboratory and in both cases I have recommended Cali-5-Bond bags; I have had some bad experiences with sample bags sold by some of your competitors. It may be our clients will end up contacting you directly and placing their own orders; I realised that our stock of bags are low so I decided to replenish it so that I could provide bags if need be.

We have found Cali-5-Bond bags store the samples reliably for months unlike some other sampling bags that are on the market.

Dr. Andrew Smith

Sen. Prin. Research Scientist - ANSTO
Apr 17, 2019

The Cali-5-Bond Bag in Use

A short video on how we use the Cali-5-Bond sampling bags.

View Video

Clarah Kimani and Karim Mtili

Postgraduate students - Helium One
Dar es Salaam,Tanzania
May 6, 2019

Cali-5-Bond bags

These bags worked great for hydrogen sampling. The valves were easy to use. The bags met our expectations.

William Best

Senior Project Manager - CEC
Charlotte, NC
Jul 2, 2019


Refining Process Services, Inc has been using Calibrated Instruments, Inc. Cali-5-BondTM gas sampling bags for over 33 years. The quality of the bags has been consistently excellent and
the technical service has always been outstanding. The team at Calibrated Instruments, Inc. has worked with us to customize the bag design, which has allowed us to simplify our sampling
procedures. Over the years, we have used close to 1000 sample bags and we have never had a leak or a loss problem. On several occasions, when we have had to place rush orders,
Calibrated has always been able to meet our (sometimes unreasonable) deadlines. We use the bags in a procedure called Fluid Catalytic Cracking Unit Reaction Mix Sampling, in
which we are obtaining a sample that contains everything from hydrogen and H2S through heavy fuel oil. We chose these particular bags because they are impermeable to hydrogen, inert with
regard to H2S as well as being sturdy and reliable. The bags can be used for sampling a wide a variety of process and exhaust streams in refineries, petrochemical plants and other industrial
operations. We highly recommend Calibrated Instruments, Inc., their product and the personnel without reservation. You may contact me directly if you have any questions.

Refining Process Services, Inc.
(909) 980-5451

Bob Campagna

Refining Process Services, Inc.
(909) 980-5451
Jul 2, 2019

Calibration Bag

I needed to research this bag as I was not the one who purchased it. Came to find out we purchased this from Calibrated back in 2004. I was pleasantly surprised to discover that this bag had been useful to us for so many years. My environmental department put in an order for 6 more, and I see no reason to change type or supplier. Tina, the manager at Calibrated, was very pleasant and very helpful. It has been a pleasure doing business and I look forward to continuing to use you products.
Thank you so much,
Michael Smith, Amvac Chemicals.

Michael Smith

MRO Purchasing - Amvac Chemical Corp
Los Angeles
Oct 1, 2019

Penn State University uses Cali-5-Bond™ Bags

Our current project involves the conversion of biomass into biogas using the process of anaerobic digestion. As a part of this project, we regularly collect and analyze biogas samples.

For this, we are using the Calibrated Instruments Inc. Cali-5-Bond™ Gas Sampling Bags. These bags are multilayered, sturdy, leakproof and work very well for collecting and storing our samples until we are able to analyze them.

An additional advantage is to be able to customize the size and the ports of the gas bags so that we can design them based on our needs for specific experiments. The bags come with valves and sampling ports as well, which makes the collection and analysis fairly easy. We have had good success with these and have been able to use them quite reliably for our needs.


Anahita Bharadwaj

Penn State University
Oct 8, 2019

Using Cali Bond Bags to Find Helium

I have been using Cali-5 Bond bags for soil gas sample for helium and hydrocarbon exploration for about 15 years. I like the replaceable septum on the 500 ml bags that prevent leakage of helium and hydrocarbons from the bags over considerable time. In June, I will collect soil gas samples in 500 ml Cali bags over a helium prospect in Arizona. The samples will be analyzed in the field using a portable quadrupole mass spectrometer for hydrocarbons and fixed gases including helium. The nice thing about Cali-5 bags is they won’t leak and you can take samples at atmospheric pressure, which is necessary for introducing the sample to the mass spec.

Dr. David M Seneshen

President - Geochemical Insight
Denver, Colorado
May 7, 2020

Leak Resistant Sampling

I work at a fluids Geochemical laboratory and we know from experience that the Cali-5-Bond bags are the most robust gas sampling vessel. Clients will drop off samples in cheap tedlar bags only to be disappointed when the results have been compromised due to vessel leakage. We always in turn recommend they use Cali-5-Bond bags in the future to drastically reduce this possibility. Cheap leaking tedlar bags will always change the isotopic results of the sample. An ounce of prevention is worth a pound of cure.

Kelsey Marzolf

Laboratory Supervisor - Dolan Integration Group
Westminster, CO
Oct 30, 2019


Great doing business with Calibrated Instruments. Very fast shipping and they always respond quickly.

Steve K.

Geologist - NFG
Buffalo, NY
Oct 15, 2019

Great option for anaerobic culture gas samples

We have been using Cali-bags with luer-fit valves to store gas samples from our anaerobic culturing experiments. They are very easy to use and we have not had any problems with sample leakage. We are very pleased with their performance!

Matthew Kirk

Associate Professor - Kansas State University
Manhattan, Kansas
Aug 3, 2020

Great Quality Gas Bags!

Thank you very much for getting my order shipped out right away! Great quality gas bags and great service! 🙂

James Donald

InnoTech Alberta
Jul 6, 2023
We Ship Globally!

We are proud to offer our Cali-5-Bond™ sampling bags, which have been widely used by our customers from all corners of the world. We take pride in the trust and confidence that our valued customers have placed in us regarding the quality and reliability of our products. Furthermore, we want to invite you to take a closer look at our interactive map, which showcases some of our recent orders that were shipped globally. Through this interactive map, you can see firsthand how our Cali-5-Bond™ sampling bags have been utilized in multiple industries, such as pharmaceuticals, oil and gas, and food manufacturing, to name a few. We hope that by reviewing this map, you’ll have a better sense of the vast scope and reach of our company, and how we are committed to providing the best possible products and services to all of our customers.

Our products undergo meticulous packaging procedures to ensure they reach you in impeccable condition. We take great care in preparing and securing each item so that it arrives at your doorstep in a pristine state. Our packaging team follows stringent guidelines to protect your purchase from any potential damage during transit. Your satisfaction and the quality of our products are our top priorities, and our commitment to careful packaging reflects that dedication.

Cali-5-Bond™ Gas Sampling Bag Features

  • Totally Non-Permeable
  • Chemically Inert
  • Multi Layer Material
  • Totally Opaque – provides protection against UV light
  • Extra Strength (5 mil thick)
  • Extremely Rugged & Portable
  • Indefinite Shelf-Life

The construction and materials of Cali-5-Bond™ gas sampling bags ensure the physical integrity of any sample taken, it remains truly representative of its collection environment or medium conditions. Cali-5-Bond™ bags allow all samples to be stored without change over time.

In contrast to other single or multi-layer plastic materials currently in use, polymer Cali-5-Bond™ sampling bags are made by a patented production process bonding multiple layers of material together into a single flexible sheet. The absolute barrier to air, gas or liquid permeation is a layer of aluminum foil, a proprietary formulation of HDPE forms the totally inert and non-reactive inner-liner (wetted surface).

Standard sizes available. Calibrated Instruments also offers custom sizes, shapes and connection choices to meet individual user specifications.

Cali-5-Bond™ Gas Sampling Bag Design

Any gas sampling bag technique is dependent upon the quality of the sampling bag used. The construction and materials of the Cali-5-Bond™ Gas Sampling Bags ensure the physical integrity of any sample taken, and allow it to be stored without change over time. Thus, the collected sample remains truly representative of its collection environment or medium conditions.

In contrast to common single-layer plastic sampling bags, Cali-5-Bond™ bags are made of multiple layers of material bonded together to form a single flexible sheet.


Industrial process and fundamental research applications are as numerous as the human imagination can be creative. New uses are literally discovered every day; and join applications as diverse as collecting vapors; liquids; and even odors for panel testing.

  • Hard-to-Reach Locations – Ideal for use, bags are an essential supply item when stack testing CEMS or conducting FCC tests at petroleum refineries.
  • Real-Time Gas Analysis Techniques – Often time restricts gas monitoring activity to a single fixed point. In contrast, totally portable gas sampling bags permit absolute freedom of movement and permit economic simultaneous sampling over a wide area.
  • Oil & Gas Field Exploration – Used extensively in oil and gas field exploration as wells are sunk and monitored. Ideal for collecting natural gas samples for isotopic analysis and source characterization.
  • Biotechnology & Life Science – Cali-5-Bond™ sample bags fly in NASA’s Space Program and are also found in the deepest mines; both instances where monitoring air quality is a “life and death” matter.
  • EPA Environmental or IH/OSHA Collection – Gas sampling bags may be used to collect “grab” or “time weighted” samples for ambient air and workplace compliance applications and audits.


Gas sampling bag inflation pressures need not exceed 7.0″ WG (17.4 mbar, 0.25 psi).

  • Bags Should Not Be Over Inflated – When filled, they should not appear “tight”. Over-inflation may lead to premature bag failure. When bag samples are air transported, ample provision should be made for gas expansion at higher flight altitudes. Users should consult US Department of Transportation (DOT) Code of Federal Regulations (CFR 49) and the International Air Transport Association (IATA) regulations which must be followed for the shipment of flammable and toxic gas(es) in gas sampling bags.

  • Bags should not be used at temperatures higher than 125 – 130 °F (50 – 55 °C) – All polymer based gas sampling bags should be handled with extra care when used at constant gas volume temperatures above ambient, particularly above 110 – 115 °F (40 – 45 °C).

Consult our Technical Service Department before undertaking any “bake-out” preparation of the bags as part of an established sampling protocol.

If high temperature stack gases are to be collected, sample line tubing should be long enough to allow the sampled gas stream to cool before entering the bag. Depending upon final sample analysis requirements, it may be necessary to collect any condensed vapor in the sampling line; or to “dry out” the wet sample gas flow into the bag.

gas sampling bags

Standard sizes available

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