Guardian™ Autosampler Probe

(In response to a using the Guardian Probe) The probe is very solid and shows no "wobble" when the arm is moving. The drop elimination is working perfectly.

Overall, the guardian probe has been the perfect selection for our applications using ICP-OES. We normally run an organic matrix (1:9 dilutions of semi-refined corn oil samples in kerosene), and the Agilent brand probe we were using previously had excessive issues with dripping between samples in their SPS4 autosampler system. The guardian probe has not had any dripping or leaking issues since its installation, and we are still using the same one we ordered in August. Not only has the probe exceeded performance expectations; it is marginally cheaper than the lesser-performing competition. The time we would spend re-analyzing samples and calibration curves due to dripping has been reclaimed, thanks to the probe. I hope my insight may prove helpful to your team, and thank you once again for providing solutions for the troubles of trace analysis!

We have been utilising the Guardian Probe in our operations for more than six months, and it is with pleasure that we report its remarkable performance. The probe has demonstrated robustness and reliability in handling various sample types. Notably, we have found that it remains unclogged, even during the analysis of samples containing particulates, which we typically allow to settle before initiating the analytical process. To further safeguard the integrity of our nebulisers, we have adopted the use of the Guardian In-Line Particle Filters, effectively preventing any obstruction to the nebuliser. As a result of this precaution, it seems we have fewer nebuliser failures compared to previous experiences.

We are absolutely in love with this probe. The filter in the top works perfect.

The sample tube former has been great. It has alleviated my concerns about damage to the probe line due to collisions with the X-Axis bar of the autosampler.

(In response to a using the Guardian Probe) With less downstream particulate and fewer cross-contamination events, I would opine that this probe does present an advantage. It is also easy to install, remove, and maintain. The quick-connect is convenient.

We are thoroughly satisfied with the Guardian Probe's performance and believe it to be a valuable asset to our analytical processes.

(In response to a using the Guardian Probe) I purchased these probes specifically to reduce nebulizer blockage.

(In response to a using the Guardian Probe) It should be noted that we’ve also installed the Guardian in-line filter, so there are confounding factors. Regardless, our lab almost never encounters blocked nebulizers any longer. Previously, it was the most prominent reason for down-time. This has also led to less replacing of nebulizers, as SeaSprays and other glass nebs would eventually accrue particulate that couldn’t be backflushed or dissolved (Si-based, likely).