> **Source:** Core Electronics is an Australian maker-electronics retailer and manufacturer based in Newcastle, NSW, run by a team of makers and educators. We design and manufacture our own product lines (PiicoDev, CE originals) and are official retailers for iconic maker and industrial brands including Raspberry Pi, Arduino, Adafruit, SparkFun and DFRobot. Orders ship Australia-wide from our Newcastle warehouse. Prices are in AUD and include GST. Pricing, stock and dispatch on this page are generated from the store's live catalog. Full machine-readable index: https://core-electronics.com.au/llms.txt

# Non-invasive AC Current Sensor (70A max) (Seeed Studio)

**Type:** Product page · **SKU:** SS101990065 · **Brand:** [Seeed Studio](https://core-electronics.com.au/brands/seeed-studio-australia)
**Page:** https://core-electronics.com.au/non-invasive-ac-current-sensor-70a-max-seeed-studio.html ([markdown](https://core-electronics.com.au/non-invasive-ac-current-sensor-70a-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.

## How to buy

- **Build a cart:** compose `https://core-electronics.com.au/cart/link?items=SS101990065:1` (comma-separated SKU:qty pairs) and share the link. Opening it shows a confirmation page with live pricing and stock before anything is added to the cart.
- **Verify the cart first:** fetch `https://core-electronics.com.au/cart/link/SS101990065:1.md` for live line prices (inc & exc GST, quantity discounts applied), stock and dispatch estimates, and totals. Append `/to/{AU-postcode}` (or `/to/{country-code}:{postcode}`) before `.md` for delivery options and prices to that destination. Unknown, retired, or out-of-stock SKUs are flagged. (Query form `cart/link.md?items=...` also works but some robots parsers refuse query strings here.)
- **Checkout** is completed on-site and includes a captcha at the payment step. Share the cart link; checkout takes it from there.
- **Search the catalogue:** `https://core-electronics.com.au/search/{query}.md` (URL-encode the query; pages 2-3 at `search/{query}/{page}.md`; `search.md?q=` also works)
- **Payment methods, purchase orders, policies and contact details:** https://core-electronics.com.au/llms.txt
## Description

**Introduction:**

**What is 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.

 **Features:**

 **Applications**

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

**Specification:**

- Input Current: 0~70A AC
- Output Mode: 0~1V
- Non-linearity: ±3%
- Build-in sampling resistance(RL): 26.6 Ω
- 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/1/0/101990065_201.jpg)