The Conductivity/Temperature/Depth Sensor provides the accuracy and reliability required for a wide range of demanding measuring applications. With state of the art ceramic and toroidal conductivity measurement technologies, the CTD350 Sensor guarantees long term performance and highly accurate, temperature compensated, measurements in the harshest of environments.

This sensor combines the function of Conductivity, Temperature and Pressure (Depth). The specifications are the same for the individual sensors except for the addition of combined transducers in the sensor head.

The Conductivity/Temperature/Depth (CTD) Sensor provides numerous state of the art technical features:

• Toroidal conductivity sensing technology eliminates electrode corrosion effects, guaranteeing long life and reduced field service.
• On-board microprocessor controlled temperature compensation and linearisation delivers accurate conductivity data normalised to 25^oC. Alternatively, raw conductivity data is also provided.
• Ceramic depth (pressure) sensing diaphragm offers unmatched reliability.
• Depth readings regardless of atmospheric pressure changes (through the use of a large diameter venting tube cable).
• Software calibration allows users to quickly and accurately recalibrate the sensor, eliminating the down time required when sensors have to be returned for laboratory calibration. Easy to use calibration software runs on a portable PC.

The CTD350 Sensor combines robust, sealed construction with an electrode-less conductivity sensing system to offer unparalleled reliability. Designed for low power consumption, the sensor can be operated from remote power sources for extended periods. The high reliability of sensors means critical measurements are not lost through sensor down time. Time wasting unscheduled site visits are therefore minimised.

The CTD350 Sensor substantially eliminates inaccuracy in conductivity measurements due to temperature and electrode effects. A large toroidal sensing element uses free ions in solution as a conductive path between two shielded ferrite transformer cores, eliminating errors caused by electrode degradation. On-board microprocessor compensation substantially reduces system non-linearity and temperature drift errors.

Intelligent Features and Data Acquisition

Intelligent Conductivity/Temperature/Depth Sensor model CTD350 is a complete, self-contained conductivity, depth and temperature measurement and data logging system. The CTD350 provides sophisticated and versatile data acquisition, control and communications capabilities. Standard features of the CTD350 include:

• 0.5Mb Standard Memory (upgradeable to 1Mb).
• Storage of measured data within the sensor for long periods.
• Easy configuration of logging parameters and uploading of logged data.
• Automatic transfer of data to a central office simply by attaching a data modem and mobile phone.
• Improved linearity and accuracy through the use of microprocessor based compensation.
• Facility to set alarm conditions which can trigger additional monitoring equipment such as water samplers.
• Lithium battery pack option for fully self contained operation.

Sophisticated communication features in the CTD350 make remote site logging of key water parameters easier than ever. In combination with an external data modem and mobile phone, the CTD350 enables remote uploading of logged data and reprogramming of logging schedules. In addition, the CTD350 can respond to user-programmed alarm conditions by triggering an associated sensor or by calling one of four preset phone numbers with a user-programmed alarm message.

The CTD350 can be powered using external batteries (via the sensor cable) or with optional lithium battery pack, which can be fitted as an extension to the sensor body, making a fully self-contained measurement and logging system.

The CTD350 also provides a supplementary rain gauge input. With the addition of a tipping bucket raingauge, the CTD350 becomes a completely self-contained hydrographic measuring station, enabling correlation of rainfall and river height data from one compact monitoring package.

With all the features of a conventional data acquisition system in one compact package, the 300 series intelligent sensors provide the most cost-effective solution available today where combined measurement and data collection are required.

Price:.....$3,200.00

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Advanced Measurements and Controls Inc.