Guardian™ Autosampler Probe

Stop Drips and Clogs Before They Stop Your Run

A next-generation solution for laboratories that demand accuracy, reliability, and efficiency. At the heart of its innovation is a specially engineered cone-shared ceramic tip with an integrated particle filter, dramatically reducing the risk of dripping and blockages.

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Glass Expansion Guardian™ Autosampler Probe

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, ESI and Thermo Fisher Scientific™ Autosamplers.

Above Image: Guardian Probe for SPS3, SPS4, AIMS, 0.75mm - P/N 70-803-1957

Benefits of the Guardian™ Probe:

Blockages? Stopped Before they Start
The ceramic tip consists of a ring of precision formed apertures at the base of the probe, which holds back particulates before they reach the capillary line. This prevents clogs in the capillary line, nebulizers, and switching valves, cutting downtime maintenance and re-runs.

Cross-contamination Control and Sample Integrity
Cross-contamination is reduced through the novel cone-shaped tip design, which helps prevent drips from clinging to the tip. The flared collar skirt captures any residual sample running down the probe’s length, ensuring cleanliness as it moves across other sample vials.

Precision You Can Count On
The Guardian’s PEEK sheath is designed to ensure precise alignment within the middle of the vial every time, delivering consistent sampling and minimizing variability. The pointed cone-tip helps guide the probe into vial openings under minor misalignment, reducing the risk of crushed tip or damaged probe.

Chemically Inert and 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 and 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, ESI and Thermo Fisher Scientific™ autosamplers.

Resource Guide

Your all-in-one Guardian Probe reference. Everything you need, in one place.

Ordering right the first time
Organized by autosampler brand, so you know exactly which model fits your system.

Fix problems fast
Installation, performance, and common issues, with clear corrective actions.

Make your probe last longer
Proper care and maintenance, step by step.

Never get caught without one
Know exactly when (and why) you’ll need spare parts.

View the Resource Guide

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.

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

P/N 70-803-2872 installed on Shimadzu AS-20 Autosampler

Ordering Information

Guardian Probe with Connecting Line (Red)

Part Number	Description
70-803-1957	Guardian Probe for Agilent SPS3, SPS4, SPS6, & AIMS, 0.75mm
70-803-1803	Guardian Probe Cetac ASX-200, 500, 800 Series, 0.75mm
70-803-2940	Guardian Probe Cetac ASX-7400, 7600 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
70-803-2106	Guardian Probe for Thermo iSC-65, 0.75mm
70-803-2953	Guardian Probe for ESI SC-DX Series, 0.75mm

Guardian Probe only

Part Number	Description
70-803-2008	Guardian Probe Assembly for Agilent SPS3, SPS4, SPS6, & AIMS
70-803-1787	Guardian Probe Assembly for Cetac ASX-200, 500, 800 Series
70-803-2937	Guardian Probe Assembly for Cetac ASX-7400, 7600 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
70-803-2961	Guardian Probe Assembly for ESI SC-DX Series

Probe Connecting Lines for:

Cetac ASX-200, 500, 800 Series
Cetac ASX-7400, 7600 Series
Aim Lab
Agilent® SPS3 / SPS4 / SPS6
PerkinElmer® S20 Series
PerkinElmer® S10 Series
PerkinElmer® AS93
Shimadzu® AS-10, AS-20
Thermo Scientific™ iSC-65
Elemental Scientific® SC-DX Series

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 OEM 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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ICP RESOURCES

Guardian™ Autosampler Probe

Stop Drips and Clogs Before They Stop Your Run

A next-generation solution for laboratories that demand accuracy, reliability, and efficiency. At the heart of its innovation is a specially engineered cone-shared ceramic tip with an integrated particle filter, dramatically reducing the risk of dripping and blockages.