JSN-SR04T Waterproof Ultrasonic Distance Sensor

This ultrasonic distance sensor has a waterproof probe on a cable, while the evaluation board stays dry. It is suitable for measurements outdoors and in humid environments, for example for the water level in a tank. The current version 2.0 from DFRobot measures 30 cm to 500 cm with temperature compensation and runs on 3.3 V to 5 V. In standard mode, it is controlled via Trig and Echo like an HC-SR04, so libraries and examples for it can be reused.

Note: Besides Trig/Echo, version 2.0 offers further operating modes: automatic or polled output via UART and a switching output with a 1.5 m threshold. The mode is selected with a resistor or a solder bridge on the board, see the wiki for details. Older versions without operating modes carry the same SKU.

Recommended Accessories:

• Dupont Cable M-F 20cm 20 Pieces
• Cable Gland M12 / IP68

Features:

• Waterproof probe, mounting hole 22 mm
• Probe with plug on the board
• 4-pin header: 5V, Trig/RX, Echo/TX, GND
• Temperature compensation, resolution 3 mm
• Operating modes: Trig/Echo, UART automatic every 100 ms, UART on request, switching output
• According to DFRobot, connect GND first when wiring; the target should be as flat as possible and at least 0.5 m² in size

Application Examples:

• Water level in tanks, cisterns and shafts
• Reversing sensors and distance warning devices
• Distance measurement outdoors and in humid rooms
• Fill level of waste bins or detecting vehicles in parking spaces

Documentation:

• DFRobot Wiki with example code for all operating modes

Technical Data:

• Manufacturer: DFRobot
• Manufacturer SKU: SEN0208
• Type: JSN-SR04T
• Operating voltage: 3.3 V to 5 V DC (version 2.0)
• Quiescent current: 8 mA
• Operating current: 40 mA
• Measuring range: 30 cm to 500 cm
• Accuracy: ±(1 + S × 0.5 %), S = measured distance (DFRobot)
• Resolution: 3 mm
• Measuring angle: 60°
• Operating frequency: 40 kHz
• Temperature compensation: yes
• Operating temperature: -20 °C to +70 °C
• Cable length: 2.5 m
• Hole diameter for probe: 22 mm
• Board dimensions: 42 × 29 × 12 mm
• Weight: 50 g

Scope of Delivery:

• 1× evaluation board
• 1× waterproof probe with 2.5 m cable