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MS2100L - CorrTran AQUA

LPR 4-20mA / HART® Transmitter

View data sheet (PDF)
User's Manual (PDF)
CorrTran Configuration Tool (download)
Metal Samples' CorrTran AQUA is a compact corrosion transmitter used in the water treatment industry that measures general corrosion, localized corrosion (pitting), and conductance, and transmits that information to operators via 4 to 20mA / HART® protocol in real time. The corrosion rate or pitting factor is configured as the primary variable using a standard 2-wire 4 to 20 mA output. The remaining outputs are configured as secondary and tertiary HART variables.

The CorrTran AQUA 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, the CorrTran AQUA 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 AQUA 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.

Probe shown in photo not included with transmitter
  • On-line corrosion monitoring, multivariable
  • Install in an existing coupon rack
  • 2-wire, 4 to 20 mA transmitter, HART interface
  • General corrosion, localized corrosion (pitting), and conductance monitoring via HART
  • Stern-Geary B value automatically updated for changes in the process
  • Optional local LCD display

CorrTran Aqua with Display

CorrTran Aqua without Display

Technical Specifications

Model MS2100L CorrTran AQUA - LPR 4-20mA / HART® Transmitter
Physical Data
Instrument Weight: 1.1 lb (500 g)
Instrument Dimensions: 7.1” x 5.4” x 2.4” (180mm x 137mm x 61mm) without LCD display
7.1” x 5.4” x 3.4” (180mm x 137mm x 86mm) with LCD display
Operating Temperature: -40° to 158°F (-40° to 70°C) without LCD display
14° to 122°F (-10° to 50°C) with LCD display
Enclosure Material: ABS
Degree of Protection: IP66, NEMA 4X
Electrical Data  
Electrical Connection: 2-wire 4-20 mA with HART
Supply voltage: 11-30 VDC without LCD display
15-30 VDC with LCD display
Current Consumption: 4 to 22.5 mA
Maximum Load (at 24 V DC): 575 Ω with high alarm / 650 Ω without high alarm (without display) / 850 Ω without high alarm (with display)
Terminal Assignments

2-wire connection with HART (DC)

Measurement Data  
Probe Type: 3-Electrode LPR        
Measurement Type: General Corrosion1   Localized Corrosion   Conductance
Measurement Unit: mpy (mils per year) or
mmpy (mm per year)
Unitless microSiemens (µS)
Mesurement Range(s): Default Range:
0 to 40 mpy
(0 to 1 mmpy)
Low Range: 0.0 to 0.01
Medium Range:  0.01 to 0.1
High Range: 0.1 to 1.0
5 to 333,333
  Maximum2: 1000 mpy
(25 mmpy)


  1 Instantaneous corrosion
rate available as a primary variable.  Average corrosion rate available via HART.
2 Range adjustable via
HART or factory set.
Factory Settings: B value (Stern Geary value): 25.6 mV
K value (corrosion constant): 11800 (2e- in reaction)
Measurement Cycle: 4 to 34 minutes (depends on configuration)

Output Data  
Output Signal: 4-20 mA with HART protocol
Alarm Events: Alarm on over-range
Alarm Types: Digital and Analog (configurable)
Analog Alarm Options: Current high (22.5 mA) with auto-reset (default), current high with manual reset, or none
Load: Minimum load for HART communication: 250 Ω
Certificates and Approvals
Patents: U.S. patents: 7,239,156; 7,245,132; 7,265,559; 7,282,928
Conformity Information  
Degree of Protection: EN 60529

MS2100L CorrTran AQUA Ordering Information

MS2100L - CorrTran AQUA - LPR 4-20mA / HART® Transmitter
0 - No Display
5 - With Display
Cable Entry
0L - 4-Pin Electrical Connector (External)
1L - Cable Gland Entry (Internal 3-Pin Electrical Connector)
Your Part Number



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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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