Product Overview:

The LDO II AQ/AQS series are dissolved oxygen sensors specially designed for aquaculture scenarios by Hash, available in two models: LDO II AQ (freshwater use) and LDO II AQS (seawater use). The core uses fluorescence measurement for dissolved oxygen and is equipped with 3D calibration technology, calibrated before leaving the factory, achieving "out-of-the-box" functionality; No need to replace membranes or electrolytes; the overall design is convenient and durable, suitable for on-site pond patrols and online aeration control needs in aquaculture.

Working Principle:

Based on fluorescence filmless measurement technology, the specific process is as follows:

1. The sensor probe is covered with a layer of fluorescent material, and the LED light source emits blue light to illuminate the material, causing it to emit red light;

2. Simultaneously set another LED light source to emit red light as a reference reference for blue light emission time;

3. The spot pool detects the "fluorescence lifetime" of fluorescent substances from emitting red light to returning to ground state, which is inversely proportional to oxygen concentration (the higher the oxygen concentration, the shorter the fluorescence lifetime);

4. Based on the correspondence between fluorescence lifetime and oxygen concentration, it automatically calculates and outputs dissolved oxygen concentration, eliminating the need to rely on diaphragms to transmit signals between electrolytes.

Instrument Features:

● The LDO II AQ (freshwater)/AQS (seawater) series dissolved oxygen sensors for aquaculture use fluorescence filmless measurement technology, ensuring stable performance.

● Dissolved oxygen sensors are ready to use out of the box, requiring no calibration, and the fluorescent cap has a lifespan of up to two years.

● The dissolved oxygen sensor uses 3D calibration technology and is calibrated before leaving the factory, ensuring accurate dissolved oxygen measurement results.

● LDO II AQ/AQS dissolved oxygen sensors require no diaphragm replacement, no need to replenish electrolyte solution, and no need for grinding or cleaning anodes and cathodes, resulting in low maintenance requirements.

● The dissolved oxygen sensor uses an O-ring and ultrasonic dual-seal design, enhancing durability while reducing size and making operation easier.

Application Areas:

LDO II AQ dissolved oxygen sensors are suitable for freshwater aquaculture pond patrols and on-site dissolved oxygen measurement; The LDO II AQS dissolved oxygen sensor is only suitable for dissolved oxygen measurement in the marine aquaculture industry, with online control of oxygenation.

• 1. LDO II AQ (Freshwater Version)

  Applicable scenarios: On-site pond patrol inspections for freshwater aquaculture (such as fish ponds and freshwater shrimp and crab ponds);

  Core use: Real-time measurement of dissolved oxygen in water, assisting in determining whether temporary oxygenation is needed, preventing fish from surfacing due to lack of oxygen.

• 2. LDO II AQS (Marine Edition)

  Applicable scenarios: online monitoring of marine aquaculture (such as marine fish and shellfish farming);

  Core use: Linked with oxygenation equipment, the system start/stop is controlled through real-time online data to stably maintain dissolved oxygen levels in seawater, ensuring the survival and growth of aquaculture organisms.