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  Coupled Multielectrode Sensor (CMS) Probes for Localized Corrosion Monitoring and Electrochemical Studies

CMS probes are made from user-specified sensing materials, including carbon steels, stainless steels, and nickel-, aluminum-, and copper-based alloys. They can also be made from customer supplied materials that have the same microstructure/heat treatment as the system component materials to be monitored. The size of the sensing electrode varies from 0.1 to 3 mm (0.004" to 0.12") in diameter, depending on the application. Typical numbers of electrodes in a CMS probe are 9, 16 or 25 for online corrosion monitoring and vary from 8 to 100 for laboratory corrosion and electrochemical studies. Other sizes and numbers of electrodes are available.

Multielectrode sensors, probes for online, localized corrosion monitoring. Click to see probes with fittingsMultielectrode sensors, probes for online, localized corrosion monitoring. Click to see probes with fittings

 

 

 

 

 

 

 

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Details (.pdf 394KB)
 

Probe Selection Guide

  
  (1) CMS Probes with Flush Mounted Electrodes  
 

Typical Applications:

  • Quantitative Corrosion Monitoring and Electrochemical Studies for:

  • in the following environments:

  • Aqueous solution

  • Humid gases

  • Soil

  • Oil-water mixture

  • Under bio-deposits

  
 

 
 

Table 1.  Details for Ordering the CMS Probes with Flush Mounted Electrodes

Order Code

Selections
Sensing Electrode Materials(SEM) Carbon Steels, Stainless Steels ( 304, 316, etc), Al-based Alloys, Ni-Based Alloys, Cu-Based Alloys
Sensing Electrode Diameter (SED) 0.25 mm to 3 mm (0.01" to 0.125")
Number  of Electrodes (NE)

9, 16, 25 for corrosion monitoring, up to 100 for lab studies
Tubing Material Code (TMC) 1 for 304 SS,   2 for 316 SS,   3 for C276,  4 for PVC,  5 for Nylon,  6 for others
Tubing Outside Diameter (TOD) 12.7 mm to 31.75 mm (1/2" to 5/4")  ----> Details See Table 2
Tubing Length  (TL) 5 cm to 100 cm (2" to 40")
Insulator  (In) E for Epoxy,  P for  PTFE
Connector Type (CT) M for Military Connector,  D for D-Shape Computer Cable Connector
Cable Length (CL) 1 to 90 m (3 to 300 ft)
 

Table 2.  Standard Tube Nominal Size for Different Electrode -Flush-Mounted CMS Probe Configurations*

Sensing Electrode Diameter  (SED) Number of Electrodes (NE) Tube Outside Diameter (TOD)
0.25-0.5 mm (0.01 to 0.02") 8-16 12.7 mm (1/2")
17,25 19.05 mm (3/4")
25-50 25.4 mm (1")
0.51 to 1.6 (0.021 to 0.0625") 8-16 15.88 mm (5/8")
17-25 19.04 mm (3/4")
25-50 25.4 mm (1")
1.61 to 3 (0.0626" to 0.118") 8-16 19.05 mm (3/4")
17-25 25.4  mm (1")
25-50 31.75 mm (1.25")
* Non-standard configurations are available. Contact factory.
 
         
 

(2) CMS Probes With Exposed Electrodes

  

Typical Applications:

  • Qualitative Corrosion Monitoring for:

  • in the following environments:

 
  Exposed electrodes increase the sensing signal for an extremely low corrosion rate and reduce the effect of crevice between the electrodes and the insulation materials. An exposed electrode can be painted with coatings and be used for undercoating corrosion monitoring.   
 

 
 

Table 3.    Details for Ordering the CMS Probes with Exposed Electrodes

Order Code

Selections
Sensing Electrode Materials(SEM) Carbon Steels, Stainless Steels ( 304, 316, etc), Al-based Alloys, Ni-Based Alloys, Cu-Based Alloys
Sensing Electrode Diameter (SED)

1 mm to 4 mm (0.04" to 0.16")
Sensing Electrode Length (SEL) 5mm to 75 mm (0.2 to 4")
Number  of Electrodes (NE)

9, 16, 25 for corrosion monitoring, up to 100 for lab studies
Tubing Material Code (TMC) 1 for 304 SS,   2 for 316 SS,   3 for C276,  4 for PVC,  5 for Nylon,  6 for others
Tubing Outside Diameter (TOD) 15.88 mm to 31.75 mm  (5/8" to 5/4") ---> Details See Table 4
Tubing Length  (TL) 5cm to 100 cm (2" to 40")
Insulator  (In) E for Epoxy,  P for  PTFE
Connector Type (CT) M for Military Connector,  D for D-Shape Computer Cable Connector
Cable Length (CL) 1 to 90 m (3 to 300 ft)
 

Table 4.      Standard Tube Nominal Size for Different Electrode-Exposed CMS Probe Configurations*

Sensing Electrode Diameter  (SED) Number of Electrodes (NE) Tube Outside Diameter (TOD)
1 to 2 mm (0.04 to 0.08") 8-9 15.88 mm (5/8")
10-16 19.05 mm (3/4")
17-25 25.4 mm (1")
2.01  to 4 mm  (0.081" to 0.16") 8-8 19.05 mm (3/4")
10-16 25.4  mm (1")
17-25 31.75 mm (1.25")
* Non-standard configurations are available. Contact factory.
 
         
 

(3) CMS Probes for High Temperatures and High Pressures

  

 

Typical Applications:

  • Quantitative or Qualitative Corrosion Monitoring of:

  • Pitting corrosion

  • Crevice corrosion

  • General corrosion (most types)

 

  • in the following conditions:

  • Super critical water systems

  • Steam generators

  • High temperature and/or high pressure reactors

  • High pressure pipelines

  • Furnaces

  • Fireside of boilers

  • Flue gas stacks

 

  

 

 

Table 5.   Details for Ordering High Temperature and High Pressure CMS Probes with Flush-Mounted or Exposed Electrodes

Order Code

Selections
Sensing Electrode Materials(SEM) Carbon steels, stainless steels ( 304, 316, etc), Al-based alloys, Ni-based alloys, Cu-based alloys
Sensing Electrode Diameter (SED) 0.5 mm to 3 mm (0.01" to 0.12")
Sensing Electrode Length (SEL) 5mm to 75 mm (0.2 to 4") for exposed electrodes, 0 for flush mounted electrodes
Number  of Electrodes (NE) 8  to  25
Probe Fitting (PF) C for Compression Tube Fitting (5/8" to 1"), N for NTP Fitting (1/2" to 7/8")
Probe Fitting Size (PFS) 5/8" to 1" for Compression Tube Fitting,  1/2" to 7/8"  for NTP Fitting -->Details See Table 6
Probe Fitting Material Code  (PFMC) 1-304 SS,  2-316 SS,  3-C276,  4-others
Tubing Material Code (TMC) 1-304 SS,  2-316 SS,  3-C276,  4-others
Tubing Outside Diameter (TOD) 15.88 mm to 25.4 mm (5/8" to 1")  ----> Details See Table 6
Tubing Length  (TL) 5cm to 100 cm (2" to 40")
Insulator  (In) C for Ceramic, P for  PTFE
Connector Type (CT) M for Military Connector,  D for D-Shape Computer Cable Connector
Cable Length (CL) 1 to 90 m (3 to 300 ft)
 

Table 6.    Standard Tube and Fitting Nominal Size for Different High Temperature and High Pressure CMS Probe Configurations*  

Sensing Electrode Diameter  (SED) Number of Electrodes (NE) Tube Outside Diameter (TOD) Probe Fitting Nominal  Size (PFS)
Compression Fitting NTP Fitting
0.5 to 1.5 (0.021 to 0.0625") 8-10 15.88 mm (5/8") 15.88 mm (5/8") 12.7 mm (1/2")
11-16 19.05 mm (3/4") 19.05 mm (3/4") 15.88 mm (5/8")
17-25 25.4 mm (1") 25.4 mm (1") 19.05 mm (3/4")
1.6 to 3 (0.0626" to 0.118") 8-10 19.05 mm (3/4") 19.05 mm (3/4") 15.88 mm (5/8")
11-16 25.4  mm (1") 25.4  mm (1") 19.05 mm (3/4")
* Non-standard configurations are available. Contact factory.
     
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