DFRobot Gravity: Analog Dissolved Oxygen SensoR

This is a dissolved oxygen sensor kit. A dissolved oxygen meter 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, etc. There’s an old saying regarding keeping fish, “Good fish deserves good water”. Good water quality is very important to aquatic organisms. Dissolved oxygen is one of the important parameters to reflect water quality. Low dissolved oxygen in the water will lead to difficulty in breathing for aquatic organisms, which may threaten their lives. The probe is galvanic, does not need polarization time, and stays available at any time. The filling solution and membrane cap are replaceable, leading to the low maintenance cost. The signal converter board is plug-and-play and works from 3.3V - 5V which makes it compatible with most popular microcontrollers such as ESP32, Raspberry Pi and Arduino. FEATURES Dissolved Oxygen Probe： 1. Galvanic probe, no need polarization time 2. Filling solution and membrane cap is replaceable, low maintenance cost Signal Converter Board： 1. 3.3~5.5V wide-range power supply, compatible with most Arduino microcontroller 2. 0~3.0V analog output, compatible with all microcontrollers with ADC function. 3. Gravity interface, plug, and play, easy to use SPECIFICATION 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