March 2005 - Back to Basics

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Probes for Remote Field Testing of Heat
Exchangers: Configurations and Capabilities

Table 1-2

Table 1 Detector configurations, rated on an arbitrary five point scale

Detector Configuration	Pit Sensitivity and Accuracy	Large Volume Metal Loss Accuracy	Simplicity (Single or Multichannel)	Near Tube Support Probe Sensitivity and Accuracy
Absolute bobbin	3	4	5	3
Differential bobbin	4	2	5	3
Absolute array	4	5	3	5
Differential array	5	3	3	5

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Table 2 Probe configurations, rated on an arbitrary the five point scale

Probe Configuration	Sensitivity to Pits	Gross Metal Loss Accuracy	Simplicity of Interpretation	Near Tube Support Probe Performance
Basic two coil	3	4	4	3
Double exciter	5	2	2	4
Double detector	3	4	3	4

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