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Datasheet: https://images-na.ssl-images-amazon.com/images/I/81CRdUi0xWL.pdf
The item provides economical and precise solutions for AC or DC current sensing in industrial, commercial, and communications systems. Typical applications include motor control, load detection and management, switched-mode power supplies, and overcurrent fault protection. The device is not intended for automotive applications.
Output voltage proportional to AC or DC currents.
FR-4 fiber glass PCB, dual copper layers.
100% new, never used.
Electrical Parameters:
Load Maximum Current: +/-5Amp, +/-20Amp and +/-30Amp selectable.
Load Frequency Bandwidth: DC ~ 80 kHz.
Minimum Isolation Voltage: 2.1 kV(RMS).
Operating Voltage: Regulated 5VDC, or 8 ~ 35VDC.
Operating Current: 20mA(max).
MC
2025-09-03 10:17:17
Worked like a charm! As with other CZH-LABS gizmos that I’ve purchased, it’s well made and works exactly as advertised. (You’ll notice in the photo that I swapped out the red LED with a blue one).I’m using this with a ZMPT101B voltage sensor and an Arduino MKR WAN 1310 to measure power and energy use, which is then transmitted via LoRaWAN to InfluxDB and visualized in Grafana.Note: as this is a 5v device, I had to setup a voltage divider for it to work with my 3.3v Arduino.
Jason Adelaars
2025-06-25 13:35:13
I tried connecting this ammeter to a 75W 120VAC light and this sensor did not produce the proportional output voltage. According to the specs, at zero current the voltage output should be 2.5VDC and vary up to 5VDC or down to 0VDC depending on which way the current is flowing across the sensor leads. I verified the sensor output at 2.5VDC at zero amps. But I switched the light on off and saw no change in the output reading, it just remained at 2.5VDC. I would've expected it to read 2.62VDC. As a sanity check, I plugged in a 500W vacuum as the load. Same result, no change in output voltage. So this sensor will not work for me.I also tried two different power supplies (5VDC regulated and 12VDC regulated); also tried sensing on the hot or neutral sides. Same result every time = 2.5VDC. So this will not work for me. I expected the output voltage to change proportionally with the current in the circuit. For instance, I expected the output voltage to read 2.5 to 5VDC with a change in current from 0 to 5A. However, this sensor did not produce that result.
Tony R.
2025-06-21 18:25:48
at this time I cant say how good or bad it is project still in design stage but for preliminary testing I thank its just what the doctor ordered
K7MDL
2025-06-18 19:07:40
Using the 30A version for 28VDC and 48VDC VHF/UHF RF Amplifiers. For DC only half the output range is usable but that 2.5V span still works well and has been stable as long as your CPU of choice is stable. Some CPU like the Arduino Nano I find are noisy making ADC readings unstable.
michaeleluis
2025-05-22 19:00:50
I use 2 of these to monitor the amp draw on my electric fans on my old truck, and they report it back to a PLC. They’ve been in use for about a year and I’ve had no issues at all. They feedback a steady signal despite a varied input/supply (11.5-14.1 volts dc), which was a concern of mine.
Cobra Man
2025-02-14 16:20:50
Very accurate current readings once it's calibrated. I use these in conjunction with a Pico data acquisition system (ADC-24) to measure source and charge currents in portable electronic devices in the 5A range. The low series resistance and awesom measurement performance is a big advantage over other designs I've looked at or used in the past.
Wayne G.
2025-01-22 15:12:26
I was searching for a module containing the ACS712 that also contained a DC regulator so I wouldn't have to assemble one separately, this board fit the purpose perfectly.
CD
2025-01-03 15:19:01
Great product and documentation available. Does exactly what it is designed and intended to do. I have also used many other products produced by this manufacturer and consistently very good quality.
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