Glass Expansion Guardian™ Autosampler Probe

Precision Engineered. Drip-Free. Built to Protect Your Data.

Meet the Guardian™ Autosampler Probe a next-generation solution for laboratories that demand accuracy, reliability, and efficiency. At the heart of its innovation is a specially engineered cone-shaped ceramic tip with an integrated particle filter, dramatically reducing the risk of dripping and contamination.

Designed to safeguard your workflows, the Guardian minimizes sample carryover and prevents blockages in capillary tubing, nebulizers, and high-throughput switching valves. Its robust, chemically inert construction ensures long-term durability, even under demanding, high-throughput conditions. The Guardian Probe is compatible with Cetac, Agilent®, PerkinElmer®, Shimadzu®, Aim Lab, and Thermo Fisher Scientific™ Autosamplers.

Benefits of the Guardian™ Autosampler Probe:

Blockages? Stopped Before they Start

The Guardian's ceramic cone tip features a built-in particle filter that helps prevent clogs in capillary tubing, nebulizers, and high-throughput valves minimizing downtime, maintenance, and re-runs.

Protect Your Results from Contamination

A proprietary mechanical finish enhances wetting characteristics to prevent droplet beading (for aqueous samples), and the drip-resistant tip helps avoid carryover and cross-contamination, suitable for both aqueous and organic samples like used oils.

Chemically Inert & Built to Last

Made entirely from Ceramic, PEEK, and PTFE, the Guardian™ is resistant to strong acids and solvents making it a durable choice for demanding lab environments.

Flexible & Compatible

With a 1.0 mm ID and support for interchangeable UniFit™ capillaries (0.3, 0.5, 0.75, and 1.0 mm), the Guardian™ is ready for a wide range of workflows. Fully compatible with: Cetac, Agilent®, PerkinElmer®, Shimadzu®, Aim Lab, and Thermo Fisher Scientific™ autosamplers.

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Performance Comparison (Aqueous)

The video below compares the wetting properties of the Guardian Autosampler Probe with a standard PTFE encapsulated carbon fibre probe for aqueous applications. A 2% HNO3 solution with added dye was used to highlight the Guardian probe's superior wetting and drip-free performance.

Performance Comparison (Oils)

Below is a performance comparison of the Guardian Autosampler Probe against a standard PTFE encapsulated carbon fibre probe for oil applications.

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Installed on Leading Autosamplers

P/N 70-803-1787 installed on Cetac Autosampler	P/N 70-803-2008 installed on Agilent SPS 4	P/N 70-803-2754 installed on PerkinElmer S23 Autosampler	P/N 70-803-2849 installed on PerkinElmer S10 Autosampler

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Ordering Information

Guardian Probe with Connecting Line (Red)

Part Number	Description
70-803-1957	Guardian Probe for Agilent SPS3, SPS4, AIMS, 0.75mm
70-803-1803	Guardian Probe Cetac ASX-200, 500, 800 Series, 0.75mm
70-803-2097	Guardian Probe for PerkinElmer S20 Series, 0.75mm
70-803-2851	Guardian Probe for PerkinElmer S10, 0.75mm
70-803-2836	Guardian Probe for PerkinElmer AS93, 0.75mm
70-803-2872	Guardian Probe for Shimadzu AS-10 & AS-20 with Arm Assembly, 0.75mm
70-803-2851	Guardian Probe Thermo iSC-65, 0.75mm

Guardian Probe only

Part Number	Description
70-803-2008	Guardian Probe Assembly for Agilent SPS3, SPS4, AIMS
70-803-1787	Guardian Probe Assembly for Cetac ASX-200, 500, 800 Series
70-803-2029	Guardian Probe Assembly for Cetac ASX-112FR
70-803-2754	Guardian Probe Assembly for PerkinElmer S20 Series
70-803-2849	Guardian Probe Assembly for PerkinElmer S10
70-803-2819	Guardian Probe Assembly for PerkinElmer AS93
70-803-2860	Guardian Probe Assembly for Shimadzu AS-10 & AS-20
70-803-2837	Guardian Probe Assembly for Thermo iSC-65

Probe Connecting Lines for:

• Cetac ASX-200, 500, 800 Series
• Aim Lab
• Agilent® SPS3 / SPS4
• PerkinElmer® S20 Series
• PerkinElmer® S10 Series
• PerkinElmer® AS93
• Shimadzu® AS-10, AS-20
• Thermo Fisher Scientific™ iSC-65

Part Number	Description
70-803-1721	Probe Connecting line 1.0mm ID (Green)
70-803-1714	Probe Connecting Line 0.75mm ID (Red)
70-803-1852	Probe Connecting Line 0.5mm ID (Blue)
70-803-1853	Probe Connecting Line 0.3mm ID (Black)

Probe Connecting Lines for Cetac ASX-112FR

Part Number	Description
70-803-2030	Probe Connecting Line 0.25mm ID (Black)
70-803-2085	Probe Connecting Line 0.18mm ID with EzyFit (Green/Black)

Customer comments

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!

Contract laboratory - USA

(In reference to the Guardian Probe for Shimadzu AS-20) I’ve tested the Guardian Probe and I am more than happy…. It is easily installed, easily pushed out of its position if it hits a surface and it reliably falls back into position when the autosampler arm is moved upwards again. Instrument tuning and validation passes as expected when using the probe.

ICP Manufacturer - Europe

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 nebulizers, we have adopted the use of the Guardian In-Line Particle Filters, effectively preventing any obstruction to the nebulizer. As a result of this precaution, it seems we have fewer nebulizer failures compared to previous experiences.

Contract laboratory - Australia

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

Environmental Laboratory - Denmark

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