Gravity: Analog Dissolved Oxygen / DO Sensor Meter Kit

Dissolved oxygen sensor and analog signal converter kit. Compatible with Arduino, Raspberry Pi, and ESP32 for water quality monitoring.

Logical pinout · physical placement not verified

A1
Analog signal output from the conditioner board, from DFRobot SEN0237-A wiki pinout table.
Type · SignalVoltage · 0-3.0V output signal per DFRobot wiki specification.
+2
VCC supply input on the Gravity analogue interface, from DFRobot SEN0237-A wiki pinout table.
Type · PowerVoltage · 3.3-5.5V supply per DFRobot wiki specification.
-3
GND on the Gravity analogue interface, from DFRobot SEN0237-A wiki pinout table.
Type · Power
BNC4
BNC probe cable connector for the dissolved oxygen probe, from DFRobot SEN0237-A wiki pinout table.
Type · Unknown

Pin	Position	Type	Function	Voltage
A	1	Signal	Analog signal output from the conditioner board, from DFRobot SEN0237-A wiki pinout table.	0-3.0V output signal per DFRobot wiki specification.
+	2	Power	VCC supply input on the Gravity analogue interface, from DFRobot SEN0237-A wiki pinout table.	3.3-5.5V supply per DFRobot wiki specification.
-	3	Power	GND on the Gravity analogue interface, from DFRobot SEN0237-A wiki pinout table.
BNC	4	Unknown	BNC probe cable connector for the dissolved oxygen probe, from DFRobot SEN0237-A wiki pinout table.

Logical pinout · physical placement not verified

Pin details

4 connections

A
Analog signal output from the conditioner board, from DFRobot SEN0237-A wiki pinout table.
SignalVoltage · 0-3.0V output signal per DFRobot wiki specification.
1
+
VCC supply input on the Gravity analogue interface, from DFRobot SEN0237-A wiki pinout table.
PowerVoltage · 3.3-5.5V supply per DFRobot wiki specification.
2
-
GND on the Gravity analogue interface, from DFRobot SEN0237-A wiki pinout table.
Power
3
BNC
BNC probe cable connector for the dissolved oxygen probe, from DFRobot SEN0237-A wiki pinout table.
Unknown
4

Start wiring

Analog · UART · 3.3 – 5 V · Gravity

Confirm the data interface matches your host board.

Module pins: +, -, A. Schematik maps them to your board in the app.

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