# Non-invasive AC Current Sensor (20A max) (Seeed Studio)

**Type:** Product page · **SKU:** SS101990061 · **Brand:** [Seeed Studio](https://core-electronics.com.au/brands/seeed-studio-australia)
**Page:** https://core-electronics.com.au/non-invasive-ac-current-sensor-20a-max-seeed-studio.html ([markdown](https://core-electronics.com.au/non-invasive-ac-current-sensor-20a-max-seeed-studio.html.md))

Introduction: What is CT sensors Current transformers (CTs) are sensors that are used for measuring alternating current. They are particularly useful for...

## Pricing

- **Price:** $20.30 (inc GST) — $18.45 AUD, exc GST
- **Quantity discounts:** 10+ $17.72 (exc GST) · 25+ $17.16 (exc GST)

## Availability & dispatch

- Available with a lead time — expect dispatch between Aug 20 and Aug 24.

## Description

**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.

**Applications**

- Suitable for current measuring
- Monitoring and protection of AC motors
- Lighting equipment
- Air compressors

**Specifications**
- Turns Ratio: 1800:1
- Input Current: 0~20A AC
- Output Mode: 0~1V
- Non-linearity: ±3%
- Build-in sampling resistance(RL): 93Ω
- 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
- Fire resistance property: in accordance with UL94-VO

- [SCT-013 Series](https://core-electronics.com.au/attachments/localcontent/2009511142810295_39356a109e8.gif)
- CT Senors - Introduction
- CT Sensors - Interfacing with an Arduino
- CT Sensors - How to build an Arduino energy monitor

## Images

- [Product image 1](https://core-electronics.com.au/media/catalog/product/1/0/101990061_201.jpg)