Overview

Scentroid is the only manufacturer in the world to offer stainless steel sampling bags. Each stainless steel bag is made of electro-polished marine grade (316L series) stainless steel film. Stainless steel sampling bags are ideal for sampling corrosive materials such as high H2S or benzene.

Easy Air Sampling Solution

Scentroid stainless steel sampling bags are crafted from pure stainless steel film, providing flexibility and durability. The ultra-thin steel ensures 100% sample preservation, maintaining the integrity of even the most sensitive air or odour samples. The bags feature welded seams and are heated and purged for maximum purity. These stainless steel sampling bags reflect Scentroid’s commitment to delivering precise odour measurement and unmatched sample preservation.

Features at a Glance

Completely Impermeable
These bags are constructed from electro-polished 316L stainless steel, ensuring total impermeability to all compounds.

Extended Holding Time
Scentroid stainless steel sampling bags offer the longest holding time, comparable to SUMMA canisters.

User-Friendly
Stainless steel sampling bags are compatible with vacuum chambers and stack dilution samplers, just like PTFE and Tedlar bags.

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Overview

Scentroid Is the only manufacturer offering PTFE sampling bags. These bags offer a much higher resistance to contamination and Scentroid’s PTFE Sampling Bags have a longer holding time than Tedlar bags. They are also the only accepted bag material for all standards.

Why Are PTFE Sampling Bags Essential?

PTFE Sampling Bags or PTFE Bags for short, are known for their exceptional resistance to contamination, making them highly durable and easily reusable after cleaning. Their superior material properties have led to approval by the Ministry of the Environment in Ontario and numerous other environmental authorities worldwide.

PTFE Bags – Superior Performance

A recent independent study published in the Journal of Environmental Quality highlighted the outstanding performance of Scentroid’s exclusive PTFE Sampling Bags. The study found that these bags outperformed traditional sampling bags, including Tedlar bags, particularly in the use of storage of specific odorants. The study emphasized that Scentroid’s PTFE bags were particularly effective in preserving odorants from pig production, such as 4-methylphenol, which was nearly completely lost when stored in Nalophan and Tedlar bags.

This research underscores the advantages of Scentroid’s PTFE bags for odour sampling and demonstrates their ability to provide more accurate and reliable results, making them the preferred choice for environmental monitoring and air quality testing.

Completely Odourless

High-density PTFE Sampling Bags are free of any background odours, ensuring significantly more accurate measurements.

Superior Sample Retention

PTFE offers the highest level of sample retention among sampling media. Scientific studies have demonstrated up to 600% better retention over 24 hours compared to Tedlar bags.

Cost-Effective Solution

PTFE sampling bags are reusable, offering a cost-efficient option for laboratories. When paired with the SP20 Heated Purger, these bags can be reused up to 30 times.

PTFE Bag Features at a Glance

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Overview

Tedlar bags provide a reusable storage medium with good retention for most substances. Scentroid Tedlar bags are made of 2mm thick film and purged at 100 °C using Scentroid’s patented heat/vacuum SP20 Purger. Each bag is pressure-tested and leak-tested to ensure the utmost perfect quality.

Why Choose Tedlar Bags?

Tedlar sampling bags are the industry standard for reusable storage of various substances, offering reliable retention for most compounds. Scentroid’s Tedlar bags are made with 2mm thick material, providing durability and strength for repeated use.

To ensure maximum purity, each bag is purged at 100°C using Scentroid’s patented heat/vacuum SP20 Purger, effectively removing any contaminants. Every Tedlar bag is rigorously pressure-tested and leak-tested to guarantee top-quality performance, ensuring accurate and dependable results for air sampling and environmental monitoring.

Features at a Glance

Trusted Materials

Tedlar has been a trusted choice for air sampling for over 20 years, offering a stable material with reliable sample retention.

Pre-Purged and Odor-Free

Scentroid’s Tedlar bags are pre-purged to eliminate any odors from the unused material, ensuring clean and accurate sampling.

Versatile Fitting Options

Scentroid Tedlar bags are available with a range of fittings, allowing them to be customized for various sampling applications.

Benefits of Tedlar Bags

• Dupont Tedlar film works great for sample preservation
• Provides stability for VOCs and some sulphur compounds, including hydrogen sulphide
• High bursting pressure to transport samples safely
• Pre-purged using Scentroid’s Heated Air Purger for minimal background contamination
• Bags available for EPA TCLP methods

For more information on Tedlar Bags, click here!

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Overview

Nalophan is an inexpensive material used to make disposable sample bags. Nalophan can be purchased pre-made or in large rolls to reduce cost. Nalophan provides a cost-effective solution but has the shortest holding time for most compounds such as H2S, Ammonia and VOCs.

Why Choose Nalophan Sampling Bags?

Nalophan Sampling Bags are a cost-effective, disposable option for air sampling. Available pre-made or in large rolls to further reduce costs, Nalophan is ideal for short-term sampling. However, it offers the shortest holding time for many compounds, including H2S, Ammonia, and VOCs, making it suitable for immediate or near-term analysis.

Features at a Glance

Cost-Effective Solution

Nalophan bags are highly affordable, making them ideal for sampling campaigns where long-term sample preservation isn’t necessary.

User-Friendly

Scentroid Nalophan bags are easy to assemble and use, featuring push-in caps that are simple to open and 100% leak-proof when closed.

DIY Kits and Pre-Made Options

The Nalophan DIY kit includes a 100m roll and accessories to create 150 10L sample bags. Alternatively, pre-made bags are available in various capacities, ready for immediate use.

Benefits of Nalophan Bags

• Quality Nalophan film for durable and reliable sampling
• Low background odour
• Great for samples processed without long delays
• Straight tube connection for zero back pressure flow
• Good stability for carbon monoxide
• Great for samples with moderate VOC and H2S

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Overview

The Scentroid Static Hood sampler provides an easy to use and contaminate-free solution for taking air samples from biofilter beds and other surfaces that have positive airflow. The all stainless steel construction ensures easy decontamination. The stack disassembles for ease of transportation.

Available Models

The static Hood sampler is available as three different sizes: SH25, SH50, and SH75:

• Features three (3) separate static hood sizes for varying applications
•  The 0.5m^2 has been designed for EPA guidelines – the stainless steel construction makes for a rapid and deep sample analysis
• The 0.25m^2 model is smaller and more portable to be used with the SM100 to assess bio-filter efficiency and health
• the SM100 can be connected directly to the sample port of the Scentroid Static Hood for direct measurement

Usage Instructions

The Static Hood Sampler is incredibly easy to use:

• Place the static hood on a surface and firmly press down
• wait for the sample to fill the hood three times
• Acquire the sample at half the rate of emissions

For more information on the static hood sampler, click here!

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Overview

The Scentroid SW60 is the next generation of wind tunnel samplers (AKA ventilated sampling hoods), used for sampling on solid or liquid surfaces with passive odour emissions in accordance with both EN13725 and VDI3880. The SW60 wind tunnel sampler offers a number of unique features that make it the most accurate and user-friendly area source sampler in the world.

The wind tunnel sampler is made of state-of-the-art PTFE coated aluminum composite material that is both extremely rigid and ultra-light. The wind tunnel only weighs 10 kg making it very easy to handle by a single technician. Despite being extremely light, the composite material makes the SW60 Wind Tunnel Sampler tough enough to withstand the harshest working conditions.

Continuous Airspeed Monitoring

Scentroid SW60 wind tunnel sampler has a built-in anemometer that remotely monitors the exact wind speed within the tunnel. Data is logged and shown on any mobile tablet or phone. This not only significantly increases the accuracy of odour sampling, but also provides a means of setting the airspeed to the exact desired value.

Operational Guide

• Connect the air supply to the wind tunnel
• Connect wind tunnel to a tablet for airspeed measurements
• Connect a vacuum chamber to the sample port
• Adjust airspeed to the desired value
• Acquire sample using the vacuum chamber

For more information on the Wind Tunnel, click here!

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Overview

The Scentroid Flux chamber is the perfect sampler for both land and water!

The Scentroid Flux chamber (AKA Emission Isolation Flux Hood) determines emissions levels from solid or liquid surfaces. The SF450 has a 100% solid stainless steel construction to ensure zero cross-contamination. Flotation is achieved using 4 stainless steel floats eliminating the need for rubber tubes or foam making the unit easy to clean and maintain.

Flux Chamber Applications

• Emission measurements from liquid surfaces such as settling tanks and off-spec ponds
• Emission measurements from solid surfaces such as compost piles and sludge
• Emission measurements from liquid active sources such as aerated lagoons
• Ideal for the sampling of corrosive sources e.g. with high benzene or H2S content
• Ideal for field operations that require quick decontamination

Flux Chamber Basics of Operation

• Connect the sweep airline either nitrogen or zero air cylinder
• Move the flux chamber to sampling location
• Allow time for the 2 air exchanges inside the chamber
• Extract sample using the vacuum chamber
• For aerated liquid sources, an air sweep may not be required

For more information on the Scentroid Flux Chamber, click here!

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Overview

Scentroid vacuum chambers are easy to use, portable, and cost-effective air sample collection devices. Vacuum chambers are used to pull samples directly without dilution from the stack, ambient air, or other sampling devices such as flux chambers or wind tunnels. The Scentroid vacuum chamber air sampler is available in multiple sizes to fit bags of up to 10L, 25L, and even 50L. Use the Scentroid vacuum chamber for soil gas sampling, groundwater testing, stack sampling, hazmat testing, and U.S. EPA Methods 18, 0040, and ventilation studies. Scentroid vacuum chamber and the bag sampling box are designed for Scentroid PTFE sample bags.

The Vacuum Chamber (bag sampling chamber) uses a built-in miniature pump to create a vacuum of more than 18” HG inside the sample box. The 12V rechargeable battery is capable of sustaining more than 75 samples with a single charge and can be recharged using a 110/220V outlet or a 12V car outlet.

Purging Function

The purge function creates pressure within the sampling chamber, forcing all the air inside the sample bag through the sample line. This function makes purging, priming, and conditioning an easy, one-step process!

Vacuum Chamber Applications

• Acquire a sample from ambient air
• Acquire a sample from flux chamber
• Acquire a sample from the static hood
• Acquire a sample from wind tunnel
• Acquire a sample from another source that will not create condensation within the sample bag

Vacuum Chamber Operation Basics

• Open the vacuum chamber
• Connect the sample bag to the PTFE tube inside the chamber
• Close the chamber and connect the external sample line to the sample collection device, or leave off to sample ambient air
• Switch to sample function to draw in the sample air
• Stop when the sample is half full and switch to purge routine to exhaust all lines
• Switch to sample function again and fill the bag with sample air
• Turn unit off and open the case
• Close sample bag valve and remove it from the vacuum chamber

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If hot gasses emitted from a stack are directly placed in a Tedlar or Nalophan bag they begin to develop condensation. These small droplets of water absorb many of the critical components that contribute to the overall odour of the sample. The stack diluting sampler eliminates this problem by mixing the stack air with dry clean Nitrogen so that the moisture can’t condense inside the bag. The mixing happens inside the probe and since the probe becomes at the same temperature as the stack air, there is no chance of the sample developing condensation before being mixed with Nitrogen.

Stack Diluter Basics of Operation

• Attach sample bag
• Open valve on the nitrogen micro tank
• Select the desired dilution from 1:3 to 1:305 bu, while installing the corresponding dilution disk
• Insert the probe into the stack and allow 3 minutes for it to reach the same temperature as stack gases
• Press the trigger and wait for the sample bag to fill

For more information on the Stack Diluter Sampler, click here!

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The hot air from the unit can also be used to regenerate carbon filters and silica gels in the odour/humidity filter built into the SM100, SC300, or the SS600. The SP20 provides a unique function of cycling between injecting hot air and vacuuming to speed up purging of Tedlar and other reusable bags.

Benefits of Cyclic Purging:

Cyclic Purging significantly reduces the required purging time as the vacuum of the sample bags forcibly pulls odour causing molecules from the surface of the bag. Typical sample bag purging time of 1 hour using conventional hot air can be reduced to approximately 7 minutes using cyclic purging.

Heated Air Purger Basics of Operation:

Mode 1: Continuous Hot Air Purging: Used to clean sample lines, PTFE tubes, and to regenerate carbon and silica gel filters

• Air temperature is set on the unit by the operator
• The unit provides continuous hot air at the specified temperature as monitored by a built-in thermo-couple 

Mode 2: Cyclic Purging (Sample Bag Purging): Used to quickly clean reusable sample bags

• The operator sets temperature and pressure as well as the cycle time in seconds (1 – 30s)
• The unit injects hot air for the duration of the cycle, filling the sample bag
• At the end of the injection cycle, the unit switches to vacuum and completely draws the air from the same sample bag
• The cycle is continuously repeated creating a lung-like effect

For more information on the Heated Purger, click here!

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