A Division of Alabama Specialty Products, Inc.              
  Line Items in Quote Request:    







MS2801L - CorrTran MV

LPR RS-485 Modbus Transmitter

View data sheet (PDF)
User's Manual (PDF)
Instrinsic Safety Certifications
Metal Samples’ MS2801L CorrTran MV transmitter measures general corrosion, localized corrosion (pitting), and conductance, and transmits that information to operators via RS-485 Modbus protocol in real time.

The CorrTran MV utilizes state-of-the-art algorithms and data analysis techniques to accurately measure general corrosion rate and pitting. Harmonic distortion analysis (HDA) is applied to improve the performance of the industry-accepted linear polarization resistance (LPR) technique used to measure corrosion rate.

To further enhance the performance, an application specific Stern-Geary variable (B value) is calculated and updated every measuring cycle. There is no need to manually update the B value because of process changes. During the measurement cycle, CorrTran MV also performs an automated electrochemical noise (ECN) measurement, which in combination with the corrosion rate data can provide a measurement of localized corrosion (pitting).

The CorrTran MV works with Metal Samples three-electrode CorrTran style probes and electrodes. Probes are available in a variety of mounting types and materials to suit almost any type of installation.

  • On-line corrosion monitoring, multivariable
  • RS‐485 Modbus
  • General corrosion, localized corrosion (pitting), and conductance monitoring
  • Stern-Geary B value automatically updated for changes in the process

Technical Specifications

Model MS2801L CorrTran MV - LPR RS-485 Modbus Transmitter
Physical Data
Instrument Weight: 3.70 lb (1.67 kg)*
Instrument Dimensions: 8.00” x 4.82” x 3.45” (20.32cm x 12.24cm x 8.76cm)
Operating Temperature: -40° to 158°F (-40° to 70°C)
Enclosure Material: Cast Aluminum (Copper‐Free) / Stainless Steel 316
Degree of Protection: IP66, NEMA 4X
Electrical Entry: 3/4 NPT (Other entries available on special request)
* Aluminum  
Electrical Data  
Electrical Connection: Power and RS‐485 Serial communication
Minimum terminal voltage: 11 V
Maximum terminal voltage: 30 V
Current Consumption: ~30mA
Terminal Assignments


Measurement Data  
Probe Type: 3-Electrode LPR        
Measurement Type: General Corrosion   Localized Corrosion   Conductance
Measurement Unit: mpy (mils per year) or
mmpy (mm per year)
Unitless microSiemens (µS)
Measurement Range(s): Default Range:
0 to 40 mpy
(0 to 1 mmpy)
Default Range: 0.0 to 1.0
Low Range:  0.0 to 0.3
High Range: 0.3 to 1.0
5 to 333,333
  Maximum: 1000 mpy
(25 mmpy)


Maximum Measured Error: Excitation voltage < 0.05% of full span
Corrosion current measurement <0.2% of full span
Factory Settings: B value (Stern Geary value): 25.6 mV
K value (corrosion constant): 11800 (2e- in reaction)
Measurement Cycle: 4 to 21 minutes (depends on configuration)

Output Data  
Output Signal: RS‐485 Modbus RTU and ASCII protocol
Baud Rate: 2400/4800/9600/19.2K selectable
Address: 32 Maximum Units (addresses 1 to 32)
Enclosure Specifications
Explosion Proof: FM, CSA, CENELEC, UL
Protection: IP66, NEMA 4X, 7BCD, 9EFG
Hazardous Location Certifications
Type of Protection:
II 2(1) G
Ex db[ia Ga] IIC T5….T4 Gb
‐40⁰ C ≤ Ta ≤ + 80⁰ C
Ex db[ia Ga] IIC T6 Gb
‐40⁰ C ≤ Ta ≤ + 70⁰ C
Conformity Information  
Directive 2014/34/EU (ATEX): EN 60079-0 , EN60079-1 , EN 60079-11

EC-Type Examination Certificate, Statement of Conformity, Declaration of Conformity, Attestation of Conformity and instructions have to be observed where applicable. For information contact Metal Samples.

MS2801L CorrTran MV Ordering Information

MS2801L - CorrTran MV - LPR RS-485 Modbus Transmitter
Mounting Type
00 - Direct Mount (Standard)
06 - Remote Mount with 6' (1.8m) Cable
12 - Remote Mount with 12' (3.6m) Cable
XX - Special (Remote Mount with XX' of Cable)
Enclosure Type
00 - Copper Free Aluminum (Standard)
01 - Stainless Steel 316

Your Part Number





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

Follow us on: Facebook | LinkedIn

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