Model 345 -Aquamaster Multiparametric Probe

Is composed by a surface unit with full provisions for programmability, data storage and display (also containing rechargeable batteries for the whole system) and a submersible probe containing all cells, sensors and electrodes with the related measuring and conversion electronics.

The instrument simply measures the working electrode potential that changes progressively as long as the metals are stripped-away in succession at their different electrochemical potentials.

This Chemical stripping action is quite insensitive to almost any interfering organic matter present in the solution and is also insensitive to the presence of dissolved oxygen in solution (another factor of great interference in the traditional voltammetric analysis).

The constant value time at each metal"s redox potential is proportional to the concentration of the metal sample.

Is a splash-proof (IP-56) plastic box provided with a soft carrying case with handles and bands allowing hands-free operation. It includes a sealed compartment for the rechargeable battery pack and line power supply/battery-charger. If needed the instrument can be also operated with an EXTERNAL 12V battery.

A waterproof membrane keyboard allows an easy programming and parameters selection. All data can be read simultaneously on back-lighted LCD screen.

The instrument can be operated in two different modes: as real-time multimeter or as data logger (or both at the same time).

Data logger stores at intervals between 10 seconds and 24 hours. Logging start/stop operation can be either manual or predefined When measurement interval is longer than 30 seconds, the instrument automatically disable itself and disconnets the power in order to increase the battery life.

A serial interface RS-232 is provided to connect the Model 345 to any Personal Computer or other suitable device to retrieve data stored in memory. A simple WINDOWS software is available to create data disk files and to format data or reviewing and printout. Model 345 can be also connected to any existing data transmission system (MODEM or VHF radio-link) for long distance connection.

Is an all-stainless steel cylindrical container housing all sensors cells and electrodes with the related electronic circuits. All signals are amplified, scaled and converted in digital form LOCALLY INSIDE THE PROBE.

Using only DIGITAL DATA TRANSMISSION between the probe and the surface unit, all possibilities of noise, interferences and signal attenuation are thus completely eliminated. All electrodes and cells requiring frequent substitution and service, are easily removable without necessity to dismount the probe body.

The electric connection cable is internally reinforced with a Kevlar core and also acts as supporting rope. A submarine multipolar connector allows to separate the probe from the cable.

Model 345 finds its ideal application both for spot and long time measurement campaigns. Equipped with two conductivity cells with four range of measurement, Model 345 can be used in:

• Sea waters
• Bathing waters
• Fresh waters: rivers, lakes
• Waste water
• Groundwater monitoring directly in wells of 2-inch
• Water survey and profiling

Special features allow a very flexible operating:

• Back-lighted display allows reading in critical conditions.
• Large memory of 128Kb allows data acquisition and recordingof date and place of measurement.
• Possibility to maintain in charge the battery when instrument is not used, or recharging it by using a car battery when needed.
• Possibility of data interchange between users working with different probes.
• Possibility to use the instrument in fixed monitoring stations for environmental surveillance.
• Possibility of data transmission via MODEM or VHF radio-link.