Reddit mentions: The best current sensors
We found 11 Reddit comments discussing the best current sensors. We ran sentiment analysis on each of these comments to determine how redditors feel about different products. We found 6 products and ranked them based on the amount of positive reactions they received. Here are the top 20.
1. SCT-013-000 Non-invasive AC Current Sensor Split Core Transformer 100A
- Load cell-This load sensor, sometimes called a strain gauge, is the same one found in digital bathroom scales (you know, the ones you use in January for your New Year’s resolutions, and then forget about a month later).
- HX711-This module uses 24 high precision A/D converter chip hx711. It is a specially designed for the high precision electronic scale designwith two analog input channelthe internal integration of 128 times the programmable gain amplifier. The input circuit can be configured to provide a bridge type pressure bridge (such as pressureweighing sensor mode)is of high precisionlow cost is an ideal sampling front-end module.
- LOAD CELL SPECS - 34 mm x 34 mm
- Hx711 SPECS-Selectable 10SPS or 80SPS output data rate;Operation supply voltage range: 2.6 ~ 5.5V
- Package:4 x human scale load cell sensor ; 1X HX711 Module
Features:
Specs:
| Color | blue |
2. DFRobot 50A Current Sensor(AC/DC) Compatible with Arduino Interface
- Arduino interface compatible
- Output voltage proportional to AC or DC currents
- Factory-trimmed for accuracy
- Nearly zero magnetic hysteresis
Features:
▼ Read Reddit mentions3. Functional Devices (RIB) RIBXGHTF Enclosed Split-Core AC Sensor, 120V, .5-150Amp, fi
- RIB Enclosed Split-Core AC Sensor RIBXGHTF, Fixed, 120VAC,
Features:
Specs:
| Height | 2.7 Inches |
| Length | 2.3 Inches |
| Number of items | 1 |
| Weight | 1 Pounds |
| Width | 1.5 Inches |
4. Current Transformer, DROK 100A 100mA AC Current Sensor, Split Core Amp Transformer Sensing Relay, Mini Clip-on Easy to Install CT Without Power Off
- This is a mini split base current transformer; it’s the smallest one compared to the similar products (output 100MA).
- The diameter of inner hole is 16mm, the accuracy is ≤0.5 grade,
- Our ac sensing relay using snap joint structure, it can be fixed to the cable directly through nylon ties.
- The amp transformer is with Built-in input coil; small and light, easy to install.
- Fully enclosed CT, good mechanical properties and environmental resistance, strong voltage isolation capability, safety and reliability.
Features:
Specs:
| Size | 100A CT |
| Weight | 0.15 pounds |
5. CR Magnetics Low Cost Remote Current Indicator with LED
Two-color LED indicator senses alternating current11" wire leads for remote indicationSelf-powered for quick installationThermoplastic housing
▼ Read Reddit mentions6. Suncourt SW100 Current Switch
- Turns 120 VAC devices on when input current is sensed
- UL 94-V0 rated for flammability safety
- Item Package Dimension: 4.0" L x 4.0" W x 4.0" H
- Item Package Weight: 1.0 lb
Features:
Specs:
| Height | 0.8 Inches |
| Length | 3 Inches |
| Number of items | 1 |
| Size | 1-(Pack) |
| Weight | 0.2 Pounds |
| Width | 2.7 Inches |
🎓 Reddit experts on current sensors
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Summary
1. SCT-013-000 Non-invasive AC Current Sensor Split Core Transformer 100A
- Load cell-This load sensor, sometimes called a strain gauge, is the same one found in digital bathroom scales (you know, the ones you use in January for your New Year’s resolutions, and then forget about a month later).
- HX711-This module uses 24 high precision A/D converter chip hx711. It is a specially designed for the high precision electronic scale designwith two analog input channelthe internal integration of 128 times the programmable gain amplifier. The input circuit can be configured to provide a bridge type pressure bridge (such as pressureweighing sensor mode)is of high precisionlow cost is an ideal sampling front-end module.
- LOAD CELL SPECS - 34 mm x 34 mm
- Hx711 SPECS-Selectable 10SPS or 80SPS output data rate;Operation supply voltage range: 2.6 ~ 5.5V
- Package:4 x human scale load cell sensor ; 1X HX711 Module
Features:
Specs:
| Color | blue |
2. DFRobot 50A Current Sensor(AC/DC) Compatible with Arduino Interface
- Arduino interface compatible
- Output voltage proportional to AC or DC currents
- Factory-trimmed for accuracy
- Nearly zero magnetic hysteresis
Features:
▼ Read Reddit mentions3. Functional Devices (RIB) RIBXGHTF Enclosed Split-Core AC Sensor, 120V, .5-150Amp, fi
- RIB Enclosed Split-Core AC Sensor RIBXGHTF, Fixed, 120VAC,
Features:
Specs:
| Height | 2.7 Inches |
| Length | 2.3 Inches |
| Number of items | 1 |
| Weight | 1 Pounds |
| Width | 1.5 Inches |
4. Current Transformer, DROK 100A 100mA AC Current Sensor, Split Core Amp Transformer Sensing Relay, Mini Clip-on Easy to Install CT Without Power Off
- This is a mini split base current transformer; it’s the smallest one compared to the similar products (output 100MA).
- The diameter of inner hole is 16mm, the accuracy is ≤0.5 grade,
- Our ac sensing relay using snap joint structure, it can be fixed to the cable directly through nylon ties.
- The amp transformer is with Built-in input coil; small and light, easy to install.
- Fully enclosed CT, good mechanical properties and environmental resistance, strong voltage isolation capability, safety and reliability.
Features:
Specs:
| Size | 100A CT |
| Weight | 0.15 pounds |
5. CR Magnetics Low Cost Remote Current Indicator with LED
Two-color LED indicator senses alternating current11" wire leads for remote indicationSelf-powered for quick installationThermoplastic housing
▼ Read Reddit mentions6. Suncourt SW100 Current Switch
- Turns 120 VAC devices on when input current is sensed
- UL 94-V0 rated for flammability safety
- Item Package Dimension: 4.0" L x 4.0" W x 4.0" H
- Item Package Weight: 1.0 lb
Features:
Specs:
| Height | 0.8 Inches |
| Length | 3 Inches |
| Number of items | 1 |
| Size | 1-(Pack) |
| Weight | 0.2 Pounds |
| Width | 2.7 Inches |
That small of a CT is pretty safe.
For anyone wanting one of these, but don't want to build it.
If you do want to build your own, here is a cheap source of CTs.
That's totally doable, it's just that the learning curve is steep if you aren't already familiar with micro controller projects.
I am sure that raspberry pi will work for this, but I am familiar with arduino type things so that's what I would start with. A "node mcu" controller has the wifi capability, then you will need a few current transformers like this, and a couple analog to digital converters (because the node mcu only has 1 analog channel)
With such a lot of power and such a huge step down I'm not sure I'd be connecting a shunt directly to the Arduino and neither a voltage divider.
By preference I'd use something like this (https://www.amazon.com/DFROBOT-50A-Current-Sensor-AC/dp/B0187AAOMS).
Here's the solution that I used. I put the common wire for the furnace blower through a split core current sensor switch that controls the duct booster fan. Has worked flawlessly for the last 3 years. I used a Functional Devices RIBXGHTF. It has 120V AC terminals - making control of the booster fan really simple. Around $40 on Amazon, but I'll bet you can get it cheaper elsewhere.
Suncourt SW100 Current Switch https://www.amazon.com/dp/B003ZZDLQM/ref=cm_sw_r_cp_apa_221DAb2SVSS6J
If the thermostat thing doesn't work out for whatever reason then maybe this will help. You have to run the hot wire of the outlet that the electronics are on through the hole which acts as the switch for the fan.
>AC current transformer
So would i use something like this https://www.amazon.com/Current-Transformer-DROK-Transformers-Sensing/dp/B01LWN37KS? If so what would i connect to the wires? I haven't heard of using that before but my understanding is you run the cable through the inside of the hole. Then it outputs a measurement of how much is running through that cable.
After running the cable through the current transformer and getting the output signal. Would i then run that to 1kohm resistor. Then send that to an arduino?
How would i get the 1000:1 ratio? How do i bias the resistor?
The best kind of sensor would be a current clamp like this one, but I haven't tried it they're a little pricey and you'll have to split the power cable to put it over only only lead (if you put it around the entire cable, the two current fields will cancel out and you'll always read zero).
https://www.amazon.com/Suncourt-SW100-Current-Switch/dp/B003ZZDLQM/ref=sr_1_1?keywords=Suncourt+SW100+Current+Switch&qid=1568744855&s=gateway&sr=8-1