Nanotron Corrosion Rate Monitor

Introduction NANO-M controllers are microprocessor based menu driven units for monitoring corrosion rates in aqueous environments. All settings are entered into the controller through a simple front panel keypad which includes relay test keys and LED indicating lights. Description NANO-M units are designed to monitor the linear polarization resistance (LPR) between two metal tips. Relative corrosion rates are calculated by measuring polarization voltage and current. All units include: – Set point relay control with differential, high and low alarm. – Conductivity variable manual input. – Scalable 4-20mA output of corrosion rate of the 00.00-99.99 mils per year reading. – A “force on” timer that allows for manual activation of the relay for a user defined amount of time. Corrosion Rate Measurement The linear polarization rate (LPR) is a relative corrosion rates calculated by measuring polarization voltage and current between two metal coupons. The NANO-M converts LPR to an annual rate of metal loss assuming linear constants to display a corrosion rate in mils per year (mpy) where 1 mil =0.001 inch. NANO-M units should only be used in conductive fluids like cooling towers, chillers, boilers, waste water and potable water systems. For more information detailing the LPR theory in measuring corrosion rates refer to ASTM and NACE publications and the literature listed below.

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