The Stevens-Greenspan Conductivity/ Temperature/Pressure/pH Sensor provides the accuracy and reliability required for a wide range of demanding measuring applications.

With state of the art ceramic pressure and toroidal conductivity measurement technologies the Stevens-Greenspan CTDP300 Sensor guarantees long term performance and highly accurate temperature compensated measurements in the harshest of environments.

Make more accurate electrical conductivity, temperature, pressure and pH measurements with Stevens-Greenspan’s state of the art CTDP300 sensor

CTDP300

• The Stevens-Greenspan Conductivity/Temperature/Pressure/pH 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 linearization delivers accurate conductivity data normalized to 25°C. Alternatively, raw conductivity data is also provided.
• Ceramic pressure sensing diaphragm offers unmatched reliability.
• Depth readings regardless of atmospheric pressure changes (through the use of a large diameter venting tube cable).
• Innovative, optically isolated signal conditioning electronics ensure true and accurate pH readings at all times.
• Field proven gel-filled double junction pH electrode provides long term accuracy.
• 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 Stevens-Greenspan calibration software runs on a portable PC.

The Stevens-Greenspan CTDP300 Sensor combines robust, sealed construction with a combination of high performance sensor technology to offer unparalleled reliability. The high reliability of Stevens-Greenspan sensors means critical measurements are not lost through sensor down time. Time wasting unscheduled site visits are therefore minimized.

Toroidal conductivity sensing technology substantially eliminates inaccuracy in conductivity measurements due to temperature and electrode effects. Accuracy in pressure measurement is ensured through the use of a large-faced gold plated ceramic pressure sensor — a technology known for its long term repeatability — supplemented by microprocessor controlled electronics which maintain near perfect linearity (0.02%) and low temperature drift (0.002% /°C) over a wide depth range. The gel-filled double junction pH electrode with optically isolated signal conditioning electronics provides long term accuracy in pH measurements. Onboard microprocessor compensation substantially reduces system non-linearity and temperature drift errors.

Stevens-Greenspan’s intelligent Conductivity/Temperature/ Pressure/pH Sensor model CTDP300 is a complete, self-contained conductivity, pressure, temperature and pH measurement and data logging system. The CTDP300 provides sophisticated and versatile data acquisition, control and communications capabilities. Standard features include:

• 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.

A separate data logger and weatherproof housing are not required, eliminating the added deployment costs normally associated with providing a remote data logging capability.

Sophisticated communication features in the CTDP300 make remote site logging of key water parameters easier than ever. In combination with an external data modem and mobile phone, the CTDP300 enables remote uploading of logged data and reprogramming of logging schedules. In addition the CTDP300 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 CTDP300 can be powered using external batteries (via the sensor cable) or with Stevens-Greenspan’s 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 CTDP300 also provides a supplementary rain gage input. With the addition of a tipping bucket rain gage, the CTDP300 becomes a completely self-contained hydrographic measuring station, enabling correlation of rainfall and river height data from one compact monitoring package.