Product Description

The OS 304plus CTD is a high-quality and high-precision flowline detection instrument for measuring temperature, salinity, and depth. Its small diameter and ultra-low power consumption fully meet the requirements for high-performance temperature, salinity, and depth measurement. The OS 304plus CTD can be easily integrated into third-party systems such as floating profiling, anchor buoy systems, ROVs, AUVs, etc.

1、 Product Features

1. Low power sampling

2. Measurement parameters:

Standard configuration: temperature, conductivity, depth, salinity, sound velocity, water density

Scalable parameters: other sensors such as dissolved oxygen, turbidity, etc., can be expanded up to a maximum6species

32GBLarge capacity memory,60,000,000groupData storage capacity

4. High speed data upload

5. The highest6HzCTD simultaneous sampling rate

6. The maximum withstand voltage depth reaches7000rice

2、 Product Introduction

The OS 304plus CTD is a high-quality and high-precision flowline detection instrument for measuring temperature, salinity, and depth. Its small diameter and ultra-low power consumption fully meet the requirements for high-performance temperature, salinity, and depth measurement. The OS 304plus CTD can be easily integrated into third-party systems such as floating profiling, anchor buoy systems, ROVs, AUVs, etc. IDRONAUT is proud to have designed a pressure balanced sensor for the entire ocean depth, which does not require a pumping pump and has low maintenance characteristics. Among them, the most eye-catching is the well-known high-precision "seven platinum ring quartz conductivity sensor" from IDRONAUT manufacturer, which can be directly rinsed in the field without the need for recalibration. In order to ensure long-term underwater work and self flushing, even in biologically active water bodies, there will be no blockage.

The OS 304plus CTD does not require a water pump or any other external equipment, which greatly reduces the power consumption of the instrument itself. The interface of OS 304plus CTD standard isRS232C(Maximum transmission distance of 200 meters), also allows the option to install devices such asTTL、RS422、RS485andWireless BluetoothWaiting for other interfaces. Voltage resistance depth is optional1000riceor7000rice.

3、 Sampling mode:

1. Continuous: CTD allows users to0.1Hz – 6HzWithin the range, select the sampling rate to continuously collect data until interrupted. Activate and deactivate CTD to obtain measurement data for multiple cycles.

2. Pressure: CTD samples at certain pressure intervals, and multiple profile data can be obtained by starting and closing CTD. This sampling mode is particularly suitable for profile measurement.

3. Timing: CTD samples according to the set sampling frequency and then enters sleep mode within the set time interval. Once the interval time is reached, CTD will be awakened again and repeat sampling. The range of time interval settings is5Seconds to1dayThe sleep state will save battery power, and this sampling mode is often used for long-term monitoring.

4. Condition: When the selected parameter value exceeds the limit value of the configuration parameter, CTD will start sampling at the set sampling frequency until the selected parameter value is below the limit value of the configuration parameter and stop sampling. You can set a certain time interval to monitor the selected parameter values:5Seconds to1day.

5. Pulse: CTD follows the set time interval（5Seconds to1daySelect within the scope)

4、 Data storage and battery life

OS 304plus CTD is equipped with built-in 2GB non-volatile memory for storage60,000,000Each data group contains CTD sensor data, sampling date, and time.

The OS 304plus CTD is powered by one 3.6V battery, with other types of batteries available, including:

1. 1 × C-type lithium battery (non rechargeable), 3.6V, 8.4Ah (theoretically, it can work at a frequency of sampling once per hour)12A month）

2. 1 x AA lithium battery (non rechargeable), 3.6V, 2.4Ah

3. 2 x AA alkaline batteries, 3.0V

Regardless of when CTD operates in "timed, pulsed, or conditional" sampling mode, it can only extend the battery life because within the set sampling time interval, CTD will enter "sleep mode" while saving battery power. Additionally, optional“dry-switch”When the OS 304plus CTD is in the air, the software automatically interrupts the sampling of non participating parameters, saving battery power and data memory.

5、 Technical parameters

1. Technical specifications of sensors

remarks:

• Optional other range pressure sensors: 10, 40, 100, 200, 500, 2000, 4000, 6000dbar range
• 6 analog signal inputs for future expansion
• The basic parameters of seawater, such as salinity, sound velocity, water density, dissolved oxygen, etc., are calculated using the algorithm specified in Article 44 of the UNESCO Marine Technical Document "Algorithms for Basic Parameters of Seawater"

2. Electronic technical parameters

• Real time direct reading/self capacity recording: 6Hz
• Data transmission: RS232C、TTL（0~3.3VDC）、RS485、 Wireless Bluetooth
• Data storage: 2GB storage card
• Real time clock accuracy: 3s/month
• Communication speed: 38K4 bps
• Power supply: Voltage: 2.7-4.2V (battery) Rated 3.6VDC, 4.5-18VDC (external power supply)

Working hours: 45mA, 3.6V; 8 μ A, 3.6V during sleep

3. Physical parameters

1）1000Meter pressure resistance depth (AISI316/black POM shell)

Size: Diameter: 43mm, Total Length: 630mm

Weight: 1.3kg in air, 0.7kg in water

2）7000Meter pressure resistance depth (Titanium GR 2 shell)

Size: Diameter: 48mm, Total Length: 560mm

Weight: 3.7kg in air, 2.8kg in water

6、 Software

IDRONAUT's programs can run on the Windows 98se/2000/XP platform and allow operators to set the way OS 304plus CTD collects and records data, as well as upload data from the built-in 1GB memory.

ITERM： The terminal simulation program can easily communicate with the computer through the CTD built-in interface.

REDAS： Process data, display temperature, pressure, and conductivity, and obtain salinity based on UNESCO formulas and recommended algorithms

Data on sound velocity and density, and plot them.