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Model LP4300

CorrTran Style 3-Electrode LPR Probe
Retractable with Packing Gland

View data sheet (PDF)


Model LP4300 is a retractable, linear polarization resistance probe specifically designed for use with CorrTran style instruments. The probe is designed to mount easily on a 1" piping system, but it can be modified for your specific mounting requirements. The probe assembly consists of a packing gland, an insertion rod with a hermetically sealed three-electrode endcap, and a hermetically sealed six-pin connector. The retractable design allows the probe to be installed into and removed from a pressurized system without a process shutdown1,2 and it allows the insertion length (I.L.) to be adjusted by the installer. The Metal Samples packing system features a built-in mechanical stop to secure the rod in place during service. The system also utilizes an adjustable safety chain system which serves as an additional mechanical stop and eliminates the need for cumbersome safety frames in most cases. A variety of probe lengths are available to meet your specific needs (see Ordering Information). Electrodes are available in a wide variety of alloys and are sold separately (see Optional Accessories).


Probe Body - 316 Stainless Steel or C276
Endcap Seal - Glass
Fill Material - Epoxy
Packing Material: Teflon® (Standard) or Grafoil®
Temperature Rating - 500° F / 260° C
Pressure Rating - 2000 PSI / 138 Bar 2
Mounting - 1" Female NPT Standard 3

Std. Length I.L. (Max)
24" 17.53"
30" 23.53"
36" 29.53"
42" 35.53"
1 Requires a 1" or larger full-port valve (sold separately) for operation on pressurized systems.
2 Requires the Metal Samples Easy Tool (sold separately) for use at pressures over 150 psi (10.5 bar).
3 Alternate mounting types and sizes available. Contact Metal Samples for details.

The Easy Tool is required for probe insertion or retraction in systems with pressure over 150 pounds.

Related Documents

 Easy Tool
 Safety Chain Instructions
 Packing Gland Instructions
 Length Calculation for Retractable Probes
 Canadian Registration Numbers (CRNs)

LP4300 Ordering Information

LP45 - Linear Polarization 1" Female NPT Probe, Packing Gland with Teflon® (for integral type)
LP75 - Linear Polarization 1" Female NPT Probe, Packing Gland with Grafoil® (for integral type)
  Probe Body Material
22 - 316
44 - C276
  LP Electrode Options
H0 - Three-electrode CorrTran style
  Seal Type
1 - Glass
24 - 17.53" max. insertion length
30 - 23.53" max. insertion length
36 - 29.53" max. insertion length
42 - 35.53" max. insertion length
000 - None
Your Part Number



Longer lengths available upon request (sold in 6" increments).

This list represents our most common options.  Many other sizes, alloys, and options are available.
Please contact your Metal Samples sales representative if you do not see what you're looking for.
(Note: Not all alloys are available with all element types and seals.)

Electrodes are replaceable and are sold separately (below.)


Optional Accessories

EL525 Electrodes  
Easy Tool Retracting System  


Teflon® is a registered trademark of DuPont.
Grafoil® is a registered trademark of NeoGraf Solutions.

Metal Samples Company

P.O. Box 8
152 Metal Samples Rd.
Munford, AL 36268

: (256) 358-4202
Fax: (256) 358-4515

E-mail: msc@alspi.com

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Metal Samples Company is a division of Alabama Specialty Products, Inc. - Copyright © 2024