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SWiFT CTDplus Turbidity

Designed for a seamless workflow. The new SWiFT CTDplus Turbidity is the latest in Valeport’s popular range of SWiFT profilers and delivers enhanced accuracy and versatility for those requiring combined CTD measurements and Turbidity observations.

Measured CTD with all the benefits of the SWiFT

The new SWiFT CTDplus Turbidity profiler provides survey-grade sensor technology coupled with the convenience of Bluetooth® wireless technology, rechargeable battery and an integral GNSS module to geo-locate each profile.

Ease of use is at the heart of the SWiFT range and the new SWiFT CTDplus Turbidity not only makes any problematic battery changes a thing of the past and delivers fully automated data transfer with no user input required, it also features Valeport’s signature SWiFT magnetic switch ring. The switching ring is easy to operate even with cold hands, it simply turns through 90 degrees and reassuringly clicks into position. The end cap features user-friendly LED indications for operational status, GNSS, battery and Bluetooth® wireless technology.

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.


Download and review data with Valeport Ocean

Data can be quickly and easily downloaded wirelessly and uses Valeport’s new Ocean software for Windows and Connect Pathway Edition for iOS and Android. Data can be instantly shared in industry-standard data formats.

Download on the App Store Get it on Google Play

Multiple Applications

With an operational battery life of up to five days and the convenience of charge via USB, the SWiFT CTD is intended for offshore, coastal, harbour and inland environmental and hydrographic survey use.

The SWiFT CTD 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 CTD get to depth in fast-flowing currents.

The Bluetooth® word mark and logos are registered trademarks owned by Bluetooth SIG, Inc. and any use of such marks by Valeport Ltd is under license. Other trademarks and trade names are those of their respective owners.

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SWiFT CTDplus Turbidity Datasheet
SWiFT CTD Operating Manual


Valeport Ocean
Valeport Connect Pathway Edition - iOS

Requires iOS 8.0 or later.
Requires iPadOS 8.0 or later.

Valeport Connect Pathway Edition - Android
Initial Relase Version

Requires Android 5.0 and up

Technical Specifications

Sensor Specifications

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


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
0.99 R2
Minimum Detection Level
0.03 NTU (Nephelometer)


0-80 mS/cm
0.001 mS/cm
±0.01 mS/cm

Temperature - Thermistor

-5°C – +35°C


50 Bar
0.001% FS
±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
±0.01 PSU
±0.01 kg/m³


Housing - Titanium | Sensor Guard - Acetal |
Temperature Sensor - Titanium | Pressure Sensor - Titanium |
Conductivity Sensor - Polyurethane coated titanium with ceramic core
Depth Rating
ø78mm x Length 350mm
2.7kg (in air) / 1.65kg (in water)

Communications (set up and data offload)

Bluetooth wireless technology
v4 - low energy


Internal rechargeable Li-ion battery pack
Battery life
Up to 5 days operations
Typically, 1 hour fast charge will give 12 hours operation


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.


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

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