Gravity Analog AC Current Sensor with Current Clamp

This Gravity module from DFRobot measures alternating current up to 20 A without cutting the line. The supplied current clamp SCT013 is placed around a single conductor, and the module converts its signal into a DC voltage of 0.2 to 2.8 V that an Arduino reads on an analog input.

Important: Place the clamp around one conductor only, line or neutral, not around the whole cable. In the whole cable the currents cancel out and the clamp measures nothing. Work on installations with mains voltage belongs in the hands of a qualified person.

Note: The connection cable can be converted to male pins with a Dupont cable M-M, so that it also fits an Arduino UNO.

Recommended Accessories:

• Dupont Cables M-M 10cm 20 Pieces

Features:

• Contactless current measurement with a split-core current clamp, the line stays intact
• Clamp with voltage output 0 to 1 V, connected via 3.5 mm jack plug
• Analog output 0.2 to 2.8 V DC for the analog input of a microcontroller
• Operation at 3.3 V and 5 V
• Gravity connector PH2.0 3-pin

Application Examples:

• Monitoring the current draw of devices such as pumps, heaters or machines
• Detecting whether a device is switched on
• Energy measurement in Arduino and ESP32 projects

Documentation:

• DFRobot Wiki SEN0211
• Sample code and schematic on GitHub (DFRobot)
• Introduction to current transformers (OpenEnergyMonitor)

Technical Data:

• Manufacturer: DFRobot
• Manufacturer SKU: SEN0211
• Module operating voltage: 3.3 V to 5.5 V
• Module analog output: 0.2 V to 2.8 V DC
• Module input range: 0 to 1 V AC (RMS)
• Module relative error: ±4 %
• Module interface: Gravity PH2.0 3-pin (GND, +, A)
• Module dimensions: 32 × 27 mm
• Clamp type: YHDC SCT013, 20A/1V (marking)
• Clamp measuring range: 0 to 20 A AC
• Clamp output: 0 to 1 V AC, linear over 0 to 20 A
• Clamp accuracy: ±1 % (DFRobot)
• Clamp non-linearity: ±3 % (10 % to 120 % of rated current), DFRobot states ≤ ±0.2 %
• Clamp frequency range: 50 Hz to 1 kHz
• Clamp opening: 13 × 13 mm
• Clamp cable length: 1 m (DFRobot)
• Clamp plug: 3.5 mm jack
• Clamp operating temperature: -25 °C to +70 °C

Scope of Delivery:

• 1× Gravity analog AC current sensor
• 1× current clamp SCT013 20 A
• 1× Gravity analog cable 3-pin 20 cm