Taking a break

 We're taking a break moving shop and hope to be back soon. We will ship orders on 2018-07-25. 

What are CT sensors?
Current transformers (CTs) are sensors that are used for measuring alternating current. They are particularly useful for measuring whole building electricity consumption (or generation for that matter).
The split core type such as the CT in the picture above, is particularly suitable for DIY use it can be clipped straight on to either the live or neutral wire coming into the building without having to do any high voltage electrical work.


  • Suitable for the current measuring
  • Monitoring and protection of AC motor
  • Lighting equipment
  • Air compressor


  • Input Current: 0~30A AC
  • Output Mode: 0~1V
  • Non-linearity: ±1%
  • Build-in sampling resistance(RL): 62O
  • Turn Ratio: 1800:1
  • Resistance Grade: Grade B
  • Work Temperature: -25°C ~ +70°C
  • Dielectric Strength(between shell and output): 1000V AC/1min 5mA
  • Leading Wire in Length: 1m
  • Open Size: 13mm x 13mm

Non-Invasive AC Current Sensor (30A max)

  • Brand: Seeedstudio
  • Product Code: SEEED-101990028
  • Reward Points: 11
  • Availability: Out Of Stock
  • £14.36

  • Ex Tax: £11.97
  • Price in reward points: 200

Electricity Sensor - Grove

Electricity Sensor - Grove


The Electricity sensor module is based on the TA12-200 current transformer which can change large ...

Qty: 2

Non-Invasive AC Current Sensor (100A max)

Non-Invasive AC Current Sensor (100A max)


Build your own Personal Energy Monitor with the non-Invasive AC Current Sensor

Qty: 13

Energy Monitor Shield - Monitoring System with Nokia LCD Screen

Energy Monitor Shield - Monitoring System with Nokia LCD Screen


Energy Monitor Shield is an Arduino-compatible expansion card designed for building energy ...

Out Of Stock

20A Current Analog Sensor (Gravity)

20A Current Analog Sensor (Gravity)


This Gravity Analog 20A current sensor is based on the Hall current sensing principle.

Qty: 4