# Measure contactless dc current 0-100mA

#### Vindhyachal Takniki

Joined Nov 3, 2014
487
Is there any sensor available to measure dc current from 0-100mA contactless?
Contactless is the problem, looked for some sensor half effect but they are for very high currents only

#### Alec_t

Joined Sep 17, 2013
10,902
A current transformer won't work for DC current.

#### AlbertHall

Joined Jun 4, 2014
9,274
ACS712-005 has a full scale of 5A that might do the job. It will output 18.5mV at 100mA so you would probably need to amplify that to get good readings.

Joined Jan 15, 2015
5,113
Is there any sensor available to measure dc current from 0-100mA contactless?
Contactless is the problem, looked for some sensor half effect but they are for very high currents only
Yes, the non intrusive is the difficult part. There are some hall effect units available but as you mentioned high current. A 0 to 50 ADC won't help you much with a 0 to 4 VDC output. There is a line offered by CR Magnetics their CR5210 CR5211 and CR5220 offer a split core with a low range of 2.0 ADC and outputs of +/- 5 volts, +/- 10 volts or 4 to 20 mA.

Ron