Enhanced accuracy
Using Valeport’s world-leading high accuracy sensor technology to combine sensors for multiple profiles in a single drop, the SWiFT CTDplus Turbidity features a new fast response temperature probe and operates down to 500m as standard, delivering directly measured Conductivity, Temperature and Depth with Turbidity observations. In addition, the SWiFT CTDplus Turbidity will provide computed Salinity, Density and Sound Velocity.
Valeport’s Turbidity technology is essentially two sensors in one. The first is a “classic” nephelometer, using a 90˚ beam angle for turbidity levels between 0 and 2,000 NTU. The second sensor uses Optical Backscatter (OBS) for turbidity levels up to 10,000 NTU. The sensors output data separately and simultaneously at a programmable rate. This means that there is no need to switch ranges as conditions vary. Intelligent sampling and the use of a 24 bit ADC eliminates the need to switch gain.
Multiple Applications
With an operational battery life of up to five days and the convenience of charge via USB, the SWiFT CTDplus Turbidity is intended for offshore, coastal, harbour and inland environmental and hydrographic survey use.
The SWiFT CTDplus Turbidity is robust and portable. Constructed from titanium to provide unmatched durability, the CTD sensors are housed in a strong acetal protective cage. An optional deployment cage is also available to bolt onto the instrument to secure additional weight and so help the SWiFT CTDplus Turbidity get to depth in fast-flowing currents.
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The SWiFT CTDplus Turbidity is fitted with Valeport’s conductivity sensor, temperature compensated piezo-resistive pressure transducer and a new fast response thermistor temperature sensor
Turbidity
Linear Range
Nephelometer: 0 to >1 ,000 NTU – linear response1 OBS: 0 to >4,000 NTU – linear response 1 & 2 1 depending on suspended material 2 >4,000 NTU has a non-linear monotonic response that allows derivation of higher values using look-up tables\secondary calibration
Linearity 0.99 R2
Minimum Detection Level 0.03 NTU (Nephelometer)
Conductivity
Range 0-80 mS/cm
Resolution 0.001 mS/cm
Accuracy ±0.01 mS/cm
Temperature – Thermistor
Range -5°C – +35°C
Resolution 0.001°C
Accuracy ±0.01°C
Response <100m/s
Pressure
Range 50 Bar
Resolution 0.001% FS
Accuracy ±0.01% FS
Calculated Parameters and Accuracy
Calculations based on the UNESCO international standard algorithm and Chen and Millero equation
Sound Velocity ~0.25 m/s
Salinity ±0.01 PSU
Density ±0.01 kg/m³
Physical
Materials Housing - Titanium | Sensor Guard - Acetal |
Temperature Sensor - Titanium | Pressure Sensor - Titanium |
Conductivity Sensor - Polyurethane coated titanium with ceramic core
Depth Rating 500m
Dimensions ø78mm x Length 350mm
Weight 2.7kg (in air) / 1.65kg (in water)
Communications (set up and data offload)
USB
Serial
Bluetooth wireless technology v4 - low energy
Electrical
Battery
Internal rechargeable Li-ion battery pack
Battery life Up to 5 days operations
Charging USB
Typically, 1 hour fast charge will give 12 hours operation
Software
iOS and Android Valeport Ocean App for Bluetooth compatible mobile devices – instrument set up, data offload, display and translation to common data formats. Valeport’s Ocean PC software, with both USB cable and Bluetooth connectivity, for instrument setup, data extraction, display and translation to common data formats.
Instrument and data time is synchronised to GPS, UTC
Ordering 0660049-50-TU
SWiFT CTDplus Turbidity Profiler
Titanium housing rated to 500m
Supplied with
PC Bluetooth adapter
USB interface and charging cable 1.5 A charger
Valeport Ocean software
Operating manual
System transit case
