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CTD - Conductivity Temperature Depth : Smart CTD
CTD - Conductivity Temperature Depth : Smart CTD : Description
The Smart CTD is an ideal multi-sensor instrument for application where power and logging capabilities are not required. The Smart CTD in this configuration is able to manage up to 5 external sensors - each located in its own pressure housing. One single data stream is provided.
CTD - Conductivity Temperature Depth : Smart CTD : Summary Information:
| Name: | Smart CTD | | Category: | CTD - Conductivity Temperature Depth | | Model: | Smart | Number: | n/a | | Description: | The Smart CTD is an ideal multi-sensor instrument for application where power and logging capabilities are not required. The Smart CTD in this configuration is able to manage up to 5 external sensors - each located in its own pressure housing. One single data stream is provided. | | Configuration: | DO Sound Velocity pH Flurometer Turbidity | | Application: | Frequently used configuration for integration with Guildline MiniBat | | Credibility Note: | n/a | | Case Study Link : | n/a | | Price: | Consult factory |
CTD - Conductivity Temperature Depth : Smart CTD : Usage Information:
| Int Description: | Smart Mark II | | Max Number Of Sensors: | 8 | | Depth Rating: | n/a | Housing Material: | Copolymer Acetal (Delrin) | | Weight Air: | n/a | | Weight Water: | n/a | | Length: | n/a | | Diameter: | 98 | | Power Source : | External | | Housing Notes: | n/a |
CTD - Conductivity Temperature Depth : Smart CTD : Sensor Information:
| 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. |
| Name: | Chlorophyll A | | Manufacturer: | WetLabs | | Type: | Fluorometric (LED) | Model: | WETStar | | Accuracy: | Dependent of reference material | | Range: | 0.03 to 75 micrograms | | Response Time: | 0.17 s | | Max. Frequency: | Varies by CTD model (25Hz Micro, 10Hz Smart, 8Hz Plus) | | Maximum Depth(m): | 500 | | Resolution: | 1 mV | | Stability | n/a | | Location: | n/a | | Notes: | n/a |
| Name: | Turbidity | | Manufacturer: | D&A Instruments | | Type: | Optical backscatter | Model: | OBS3B or OBS3 | | Accuracy: | 1.5 NTU's | | Range: | 2000 NTU's | | Response Time: | 100 milliseconds | | Max. Frequency: | Varies by CTD model (25Hz Micro, 10Hz Smart, 8Hz Plus or EMP) | | Maximum Depth(m): | 500 / 2000 | | Resolution: | 0.1 NTU's | | Stability | n/a | | Location: | n/a | | Notes: | 500m version available in Delrin housing; 2000m version available in anodized aluminum |
| Name: | pH | | Manufacturer: | Innovative Sensors | | Type: | Combination Electrode | Model: | A23B-I1B2Z-Z1HZ | | Accuracy: | 0.1 pH | | Range: | 2 to 12 pH | | Response Time: | 15 seconds | | Max. Frequency: | Varies by CTD model (25Hz Micro, 10Hz Smart, 8Hz Plus or EMP) | | Maximum Depth(m): | 2000 | | Resolution: | 0.01 pH | | Stability | n/a | | Location: | n/a | | Notes: | n/a |
| Name: | Dissolved Oxygen | | Manufacturer: | YSI | | Type: | Polarographic | Model: | n/a | | Accuracy: | 0.2 mg/l | | Range: | 0 to 15 mg/l | | Response Time: | 60s | | Max. Frequency: | Varies by CTD model (25Hz Micro, 10Hz Smart, 8Hz Plus) | | Maximum Depth(m): | 300 | | Resolution: | 0.01 mg/l | | 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: | 15Hz | | Maximum Depth(m): | 6000m | | Resolution: | 0.002%FS | | Stability | n/a | | Location: | n/a | | Notes: | n/a |
| Name: | Sound Velocity | | Manufacturer: | Applied Microsystems | | Type: | Time of flight - stainless steel invar rods | Model: | n/a | | Accuracy: | 0.05m/s; 0.03 m/s precision | | Range: | 1400 - 1550 m/s | | Response Time: | 143 microseconds | | Max. Frequency: | 35Hz | | Maximum Depth(m): | 6000m | | Resolution: | 0.01m/s (displayed); 0.007 m/s (timing) | | Stability | n/a | | Location: | n/a | | Notes: | All AML sound velocity sensors receive over 700 individual calibration points. Calibrations are not extrapolated to cover the entire operating range of the instrument. This distinction is important. Instruments with extrapolated calibrations may find themselves significantly out of spec at individual sound velocity speeds, while the instrument - as a whole - meets averaged accuracy requirements. |
| 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 |
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