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HDS™ Personal Monitor Exposure Chamber

Test and Validate the sampling rate of virtually any VOC!

The new HDSPersonal Monitor Exposure Chamber allows laboratories to prepare and validate virtually any volatile chemical’s sampling rates relative to the collection rate of air when using the Entech HDSPersonal Monitors. Although sampling rates do not vary much on a compound by compound basis, our new exposure chamber will allow the verification of exact rates of virtually any volatile chemical to within a few percent, measured against the gravimetrically determined weight gain achieved during the sampling process. No other IH technique has such an accurate means by which to measure the amount of sample collected “during” the sampling event. HDSPersonal Monitors collect chemicals at a relative rate that is about 75–95% as fast as the collection of air. This exposure chamber can obtain specific sampling rate data on 4 HDSPersonal Monitors at a time and the validation process is easy. Neat, or multi-component liquid standards can be injected into the exposure chamber and allowed to equilibrate to achieve the desired gas phase concentrations before HDSPersonal Monitor sampling.

HDS™ Personal Monitor Exposure Chamber Features

Multiple Ports
Multiple ports are ready for evacuation, filling with diluent, gas, or liquid standards, pressure / vacuum measurements, and more!
Precise Sampling Rates
Prepare and test virtually any volatile chemical’s sampling rates relative to the collection rate of air when using our HDS™ Personal Monitors.
Silonite™ Coated Chambers
The HDS™ Personal Monitor Exposure Chamber features a large 6L volume with the reliable inertness of Silonite™.
Reliable Measurements
No flows to control or special gasses required. When done, simply analyze by loop injection (PPM Level) or extract 10cc when monitoring PPB levels (7200).
Easy HDS™ Sampling
Liquid standards are spiked into a chamber through the top and allowed to equilibrate prior to sampling. No disturbance in concentrations or chamber pressure when starting/stopping the sampling process.
Multipile Personal Monitors
Easily test up to 4 HDS™ Personal Monitors at a time.

Preparing HDS™ Personal Monitors for field sampling just became a lot easier with the HDS™ Personal Monitor Prep Station!

Simply attach an HDSPersonal Monitor to the HDS-PS1 Prep Station and use a vacuum pump and cylinder containing Helium and BFT to evacuate, ll, evacuate, and ll the sampler. The personal monitor is now ready to be sent to the eld. To clean samplers, simply evacuate, fill, and evacuate the samplers then place in an oven overnight at 70–100°C. Cool the samplers then follow the normal ll, evacuation, and ll process. Your samplers are now ready for the next field sampling event.

HDS™ Personal Monitor Prep Station

HDS™ Personal Monitors

A cylinder containing 1 PPM Bromouorotoluene (BFT) in Helium is used to “charge” the samplers prior to sending them into the eld. Since the BFT remains at the same concentration through the sampling process and delivery back to the laboratory, the BFT serves as an excellent recovery standard to validate leak-tight and inert conditions.

HDS™ Analysis

A second cylinder containing Fluorobenzene (FB) in Nitrogen at 1 PPM is used as an internal standard. Each HDSPersonal Monitor is pressurized to 7psig (7psi above atmospheric pressure) either manually or automatically on the Entech 7650-L10, 7410D, or 7200 | 7650-M MillionAir™ System, providing an internal standard to verify the correct delivery of the sample to the GCMS.

HDS™ Preparation

A cylinder containing 1 PPM Bromouorotoluene (BFT) in Helium is used to “charge” the samplers prior to sending them into the eld. Since the BFT remains at the same concentration through the sampling process and delivery back to the laboratory, the BFT serves as an excellent recovery standard to validate leak-tight and inert conditions.

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