Gas Auto-Sampler

Automated Sampling, More Accurate Measurement

The TOF Tech Gas Auto-sampler (GAS-110) automates the sampling of gaseous samples from cylinders, ambient air, or reservoirs for analysis on an Ion Mobility Spectrometer (IMS) or other sensors. This stand-alone device mixes a fixed volume of the sample with a carrier gas that enters the detector, ensuring precision. The mixing ratio is customizable based on the application, sample concentration, and detector sensitivity.

The software offers options for both manual and automatic injection, allowing users to set their desired sampling frequency.

The Gas Auto-sampler is a stand-alone device that uses an innovative design to deliver the precise volume of the sample to the IMS, independent from the sample flow and pressure, through an inert bridge, eliminating adsorption along the sample path. The system performs a purge step between each sample injection to minimize cross-contamination.

 

Precision and Accuracy   

Standard gas samples of H2S at 2, 5, and 10 ppm were introduced to the auto-sampler. Each sample was injected five times, and ion mobility spectra were recorded. The reactant ion peak remained consistent across all spectra, while the analyte peak varied.

The analyte peaks at each concentration exhibited similar intensities with a Relative Standard Deviation (RSD) of less than 3%.

Repetitive Automatic Injection