Acuity LS Page 3
Operating Manual #OMA20200327
1. OVERVIEW
This document provides an overview of the hardware and software setup for Luna’s Acuity LS Corrosion
Monitoring System. The Acuity LS system provides long duration, autonomous measurements of
environmental and corrosion parameters. Acuity LS continuously collects and records air temperature,
relative humidity (RH), surface contaminants, free corrosion of alloys and galvanic corrosion of dissimilar
materials.
The Acuity LS device is battery-powered, small in size, light weight, and mounts directly onto structures.
The battery provides approximately 4 years of operation without a replacement (assuming 60 min
measurement intervals). The commercially available battery can be replaced by the user.
Acuity LS Interface software enables users to configure each Acuity LS device at startup and collect data.
Acuity LS corrosion sensing elements are replaceable by the user. Replacement Acuity LS Lid Sensor
Panels (LSP) may be purchased from Luna.
2. HARDWARE DEFINITION
The Acuity LS system includes a multi-sensor data acquisition device that saves data internally, and
when connected to a computer can transmit the stored data (see Section 5). The Acuity LS system
hardware components are the battery-powered sensor device with a replaceable Acuity LS Lid Sensor
Panel (LSP) and the RS-485 communications cable for computer connection (Figure 1). The Acuity LS
sensor device comes complete with a base, single LSP and a single battery. The RS-485 cable and spare
LSP items are sold separately. Spare batteries may be purchased online (via Amazon and others) or
through Luna.
Figure 1. Standard Acuity LS hardware. The RS-485 communications cable
and replacement LSPs are sold separately.
The LSP includes a gold interdigitated electrode (IDE) for sensing solution conductance, a free corrosion
IDE to measure corrosion current of an alloy, a galvanic IDE to measure galvanic current of two dissimilar
alloys, and a sensor to measure air temperature and relative humidity (Figure 2).
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