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MS2100L - CorrTran AQUA

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Corrosion Monitoring,Instruments,Meters

MS2100L - CorrTran AQUA

LPR 4-20mA / HART® Transmitter

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.


• 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

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 O with high alarm / 650 O without high alarm (without display) / 850 O without high alarm (with display)

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: 400 mpy
(10 mmpy)

1 Instantaneous corrosion
rate available as a primary variable. Average corrosion rate available via HART.
2 Range adjustable via
HARTor 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 O

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
User Manual


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Metex Corporation Limited has been providing superior products and services to the process control, chemical treatment, waste water, industrial and manufacturing industries for over 25 years. It is our goal to continually provide our customers with the best possible equipment, technology, and service.


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