Name: Gravity: Analog Dissolved Oxygen Sensor / Meter Kit For Arduino
SKU: 729237
Availability: InStock

Gravity: Analog Dissolved Oxygen Sensor / Meter Kit For Arduino

€209,99 incl. VAT

SKU: 729237 Category: DFRobot

Gravity: Analog Dissolved Oxygen Sensor kit is compatible with Arduino microcontrollers. This product is used to measure the dissolved oxygen in water, to reflect the water quality. It is widely applied in many water quality applications, such as aquaculture, environment monitoring, natural science and so on.

The probe is a galvanic probe, no need of polarization time, and stay available at any time. The filling solution and membrane cap is replaceable, leading to the low maintenance cost. The signal converter board is plug and play, and has the good compatibility. It can be easily integrated to any control or detecting system.

Gravity: Analog Dissolved Oxygen Sensor is used to measure the dissolved oxygen in water, to reflect the water quality. This sensor kit helps you quickly to build your own dissolved oxygen detector.

The filling solution is not included in the kit. You have to purchase it from local shop or deploy the solution by yourself . It can’t work without filling solution! Please be caution with the purchase!

The filling solution is 0.5 mol/L NaOH solution. You need to pour it in the membrane cap before use. Please be caution with the operation because the solution is corrosive. Please wear gloves! If the solution accidentally drops onto the skin, wash your skin with plenty of water immediately.

The DO sensor will consume a little oxygen during the measurement. Please gently stir the solution and let the oxygen to be distributed evenly in the water.

Gravity: Analog Dissolved Oxygen Sensor - Διερευνητική Μάθηση

SPECIFICATIONS

Dissolved Oxygen Probe

Type: Galvanic Probe
Detection Range: 0~20mg/L
Response Time: Up to 98% full response, within 90 seconds (25℃)
Pressure Range: 0~50PSI
Electrode Service Life: 1 year (normal use)
Maintenance Period: Membrane Cap Replacement Period: 1~2 months (in muddy water); 4~5 months (in clean water) Filling Solution Replacement Period: Once every month
Cable Length: 2 meters
Probe Connector: BNC

Signal Converter Board

Operating Voltage: 3.3~5.5V
Output Signal: 0~3.0V
Cable Connector: BNC
Signal Connector: Gravity Analog Interface (PH2.0-3P)
Dimension: 42mm * 32mm

For more information and examples

What is Dissolved Oxygen?

Dissolved oxygen refers to the level of free, non-compound oxygen present in water or other liquids. It is an important parameter in assessing water quality because of its influence on the organisms living within a body of water. In limnology (the study of lakes), dissolved oxygen is an essential factor second only to water itself ¹. A dissolved oxygen level that is too high or too low can harm aquatic life and affect water quality.

Non-compound oxygen, or free oxygen (O2), is oxygen that is not bonded to any other element. Dissolved oxygen is the presence of these free O2 molecules within water.The bonded oxygen molecule in water (H2O) is in a compound and does not count toward dissolved oxygen levels. One can imagine that free oxygen molecules dissolve in water much the way salt or sugar does when it is stirred

Dissolved Oxygen and water quality

Dissolved oxygen is necessary to many forms of life including fish, invertebrates, bacteria and plants. These organisms use oxygen in respiration, similar to organisms on land. Fish and crustaceans obtain oxygen for respiration through their gills, while plant life and phytoplankton require dissolved oxygen for respiration when there is no light for photosynthesis ⁴. The amount of dissolved oxygen needed varies from creature to creature. Bottom feeders, crabs, oysters and worms need minimal amounts of oxygen (1-6 mg/L), while shallow water fish need higher levels (4-15 mg/L)⁵.

Microbes

Microbes such as bacteria and fungi also require dissolved oxygen. These organisms use DO to decompose organic material at the bottom of a body of water. Microbial decomposition is an important contributor to nutrient recycling. However, if there is an excess of decaying organic material (from dying algae and other organisms), in a body of water with infrequent or no turnover (also known as stratification), the oxygen at lower water levels will get used up quicker

Dissolved Oxygen Units and Reporting

Dissolved oxygen is usually reported in milligrams per liter (mg/L) or as a percent of air saturation. However, some studies will report DO in parts per million (ppm) or in micromoles (umol). 1 mg/L is equal to 1 ppm. The relationship between mg/L and % air saturation has been discussed above, and varies with temperature, pressure and salinity of the water. One micromole of oxygen is equal to 0.022391 milligrams, and this unit is commonly used in oceanic studies ⁴⁷. Thus 100 umol/L O2 is equal to 2.2 mg/L O2.