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CTD - Conductivity Temperature Depth : CTD Plus
CTD - Conductivity Temperature Depth : CTD Plus : Description
Updated in mid-2004, the CTD Plus was originally launched in 1992 and has seen extensive use in varying conditions and applications around the globe. The instrument is a rugged, intelligent CTD designed for precision measurements of conductivity, temperature and depth. It is delivered ready-to-use, and includes an aluminum shipping case, 2m data / power pigtail, batteries, a sensor protection cage, a dummy plug, a maintenance kit, manuals and software.
In this configuration, the CTD-12 Plus is a rugged, intelligent CTD designed for precision measurements of conductivity, temperature, depth, and dissolved oxygen. The dissolved oxygen sensor - located externally to the CTD for ease of maintenance and replacement - has rapid response times to assist in profiling.
Like all Pluses, the new CTD Plus is designed for modularity. Any remote sensor purchased for use with the new Plus can be used with other Applied Microsystems Plus or Micro instruments. For example, a dissolved oxygen sensor originally purchased for vertical profiling use with a CTD Plus can be easily connected to an externally powered Micro CTD and deployed on AUVs, ROVs, or other platforms. Moreover, In the new Plus, remote sensors are no longer assigned to specific connectors on the instrument end-cap. Any analog (or digital or TTL) sensor can be plugged into any analog (or digital or TTL) connector, greatly simplifying field maintenance.
The pressure sensor accuracy is 0.05% and can be upgraded to 0.01%FS. The sampling rate has been increased to 25Hz. The aluminium housing provides strength and protection from knocks and shocks.
The new Plus comes standard with USB download capability to accelerate access to data once the instrument has been removed from water. Access to the USB port is via a removable threaded cap, which will expose the USB connector. The USB connector itself is located in a water-blocked header.
CTD - Conductivity Temperature Depth : CTD Plus : Summary Information:
| Name: | CTD Plus | | Category: | CTD - Conductivity Temperature Depth | | Model: | Plus | Number: | n/a | | Description: | Updated in mid-2004, the CTD Plus was originally launched in 1992 and has seen extensive use in varying conditions and applications around the globe. The instrument is a rugged, intelligent CTD designed for precision measurements of conductivity, temperature and depth. It is delivered ready-to-use, and includes an aluminum shipping case, 2m data / power pigtail, batteries, a sensor protection cage, a dummy plug, a maintenance kit, manuals and software.
In this configuration, the CTD-12 Plus is a rugged, intelligent CTD designed for precision measurements of conductivity, temperature, depth, and dissolved oxygen. The dissolved oxygen sensor - located externally to the CTD for ease of maintenance and replacement - has rapid response times to assist in profiling.
Like all Pluses, the new CTD Plus is designed for modularity. Any remote sensor purchased for use with the new Plus can be used with other Applied Microsystems Plus or Micro instruments. For example, a dissolved oxygen sensor originally purchased for vertical profiling use with a CTD Plus can be easily connected to an externally powered Micro CTD and deployed on AUVs, ROVs, or other platforms. Moreover, In the new Plus, remote sensors are no longer assigned to specific connectors on the instrument end-cap. Any analog (or digital or TTL) sensor can be plugged into any analog (or digital or TTL) connector, greatly simplifying field maintenance.
The pressure sensor accuracy is 0.05% and can be upgraded to 0.01%FS. The sampling rate has been increased to 25Hz. The aluminium housing provides strength and protection from knocks and shocks.
The new Plus comes standard with USB download capability to accelerate access to data once the instrument has been removed from water. Access to the USB port is via a removable threaded cap, which will expose the USB connector. The USB connector itself is located in a water-blocked header. | | Configuration: | Dissolved oxygen - Idronaut | | Application: | Vertical Profiling | | Credibility Note: | n/a | | Case Study Link : | n/a | | Price: | Consult factory |
CTD - Conductivity Temperature Depth : CTD Plus : Usage Information:
| Int Description: | Plus - Profiler - Logger - 6061 | | Max Number Of Sensors: | 10 analog channels or 5 digital channels (NB: ability to integrate corresponding number of sensors a function of cumulative power requirements and available mounting / connector space) | | Depth Rating: | 5000 | Housing Material: | 6061-T6 Aluminum | | Weight Air: | 9 | | Weight Water: | 3.5 | | Length: | 566 (length of pressure housing from retainer ring / fender to sensor end cap) OR 881 from end to end (including sensors, shackle, etc.) | | Diameter: | 100 | | Power Source : | Battery / External | | Housing Notes: | Dimensions and weight do not include any additional remote sensors that might be added to the configuration.
In this configuration of the Plus, a USB connector for high-speed data download capability is included as a standard.
The standard connector is a Subconn Micro 8 wet pluggable connector. Other connector choices can be accommodated, if desired. |
CTD - Conductivity Temperature Depth : CTD Plus : Sensor Information:
| Name: | Pressure | | Manufacturer: | Keller | | Type: | Semiconductor bridge strain gauge | Model: | PA-10 | | Accuracy: | 0.15%FS | | Range: | Various to 6000 dbar | | Response Time: | 10ms | | Max. Frequency: | 25Hz | | Maximum Depth(m): | 6000m | | Resolution: | 0.005%FS | | Stability | n/a | | Location: | n/a | | Notes: | n/a |
| Name: | Temperature | | Manufacturer: | Applied Microsystems | | Type: | Thermistor | Model: | n/a | | Accuracy: | 0.005C | | Range: | -2 to 32C | | Response Time: | 100milliseconds | | Max. Frequency: | 25Hz on Plus & 8 Hz on Smart | | Maximum Depth(m): | 5000m | | Resolution: | 0.001C | | Stability | n/a | | Location: | n/a | | Notes: | n/a |
| Name: | Pressure | | Manufacturer: | Keller | | Type: | Semiconductor bridge strain gauge | Model: | PA-10 | | Accuracy: | 0.05%FS | | Range: | Various to 6000 dbar | | Response Time: | 10ms | | Max. Frequency: | 25Hz | | Maximum Depth(m): | 6000m | | Resolution: | 0.005%FS | | Stability | n/a | | Location: | n/a | | Notes: | n/a |
| Name: | Dissolved Oxygen | | Manufacturer: | Idronaut | | Type: | Polarographic | Model: | n/a | | Accuracy: | 0.2 mg/l | | Range: | 0 to 15 mg/l | | Response Time: | 3s | | Max. Frequency: | Varies by CTD model (25Hz Micro, 10Hz Smart, 8Hz Plus) | | Maximum Depth(m): | 7000m | | Resolution: | 0.01 mg/l | | Stability | n/a | | Location: | n/a | | Notes: | Idronaut states that maintenance (electrolyte and membrane replacement) should be carried out at least every three months. In-field calibration should be carried out after a long period of disuse, once a day during an extended field survey, or once a month if installed on a buoy profiler. |
| Name: | Conductivity | | Manufacturer: | Applied Microsystems | | Type: | Conductive | Model: | n/a | | Accuracy: | 0.01 mS/cm; 0.005 mS/cm precision | | Range: | 0 - 7 S/m or 0 - 70 mS/cm | | Response Time: | 25ms @ 1m/s | | Max. Frequency: | 25Hz | | Maximum Depth(m): | 6000m | | Resolution: | 0.0015 mS/cm | | Stability | n/a | | Location: | n/a | | Notes: | The Applied Microsystems conductivity sensor is short, with a length of just under 3 cm. Sensor length plays a critical role in determining resistance to the introduction of new flows into the sensor cavity, and hence response times. The equation for response time is as follows:
Response Time = (0.85 * Length of Sensor ) / Flow Speed.
Using the above, our conductivity sensor has a response time of 25 milliseconds in a 1.0 m/second flow environment and 255 milliseconds in a 0.1 m/second flow environment. Given the above, no pumps or flow tubes are required. |
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