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Model ER3110

ER Corrosion Probe    |    Non-Metallic Body    |   Cylindrical Element 

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Model ER3110 is an adjustable-length, electrical resistance (ER) probe used to monitor metal loss and corrosion rate under above-ground storage tanks. The non-metallic body eliminates the possibility of galvanic interaction that can occur with metallic insertion rods, and the optional ground lead allows the sensing element to be electrically coupled to the tank or CP rectifier.

Key Features:
Robust – Cylindrical element is ideally suited for monitoring corrosion under storage tanks.
Versatile – Can be used to monitor the native corrosion rate or the corrosion rate under cathodic protection.


Probe Body Glass Epoxy Temperature Rating
(w/ Nylon compression fitting)
150° F / 65° C
Element Seal Epoxy Pressure Rating 100 PSI / 7 Bar
Fill Material Epoxy Mounting 3/4" NPT Pipe Plug

ER3110 Ordering Information

ER3 - Electrical Resistance Adjustable Length Pipe Plug Probe
  Pipe Plug Size
2 - 3/4" NPT Pipe Plug
  Probe Body Material
7E - Epoxy
  ER Element Options
503 - CT10 Cylindrical - Element length 4”, 10 mil thickness (5 mil useful probe life)
603 - CT20 Cylindrical - Element length 4”, 20 mil thickness (10 mil useful probe life)
703 - CT50 Cylindrical - Element length 10”,50 mil thickness (25 mil useful probe life)
Maximum Insertion Length (I.L.)
11 - 9.5” max. I.L. for 4” element / 15.5” max. I.L. for 10” element probe
32 - 30.5” max. I.L. for 4” element / 36.5” max. I.L. for 10” element probe
50 - 48.5” max. I.L. for 4” element / 54.5” max. I.L. for 10” element probe
  Element Alloy
375 - C1010 Carbon Steel (UNS G10100) – CT10 and CT20 only
378 - C1020 Carbon Steel (UNS G10200) – CT50 Only
  ER Probe Options
14 - Ground Lead
Your Part Number



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.)

* Chemically equivalent to standard pipe-grade carbon steels.

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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