Model ER 7300 – Electrical Resistance Probe
Retrievable Spiral Loop for
Model ER7300 spiral loop probe is retrievable, electrical resistance probe designed for use with two inch high pressure access systems. The element is a spiral wound strip encased in epoxy. This approach to element construction offers several advantages over other element geometries
• High intrinsic resistance – provides highly stable readings with low susceptibility to noise
• High element strength – allows use in very high flow rate regimes such as a gas transmission
• Wide spacing of element loops – minimizes the risk of iron sulphide scaling and bridging.
While the spiral loop probe is ideally suited to fast flowing, sour systems, its high stability makes it a suitable choice for oil and gas systems.
Insertion length (I.L.) is specified by the customer, using the formula:
I.L. = PD + WT + 1.75″
(where PD= Penetration depth, WT= Wall thickness).
(Note: Formula valid for access fitting heights of 5.25″ (HP) and 5.5 (MH
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