> **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

# Incremental Photoelectric Rotary Encoder - 400P/R

**Type:** Product page · **SKU:** SEN0230 · **Brand:** [DFRobot](https://core-electronics.com.au/brands/dfrobot-australia)
**Page:** https://core-electronics.com.au/incremental-photoelectric-rotary-encoder-400p-r.html ([markdown](https://core-electronics.com.au/incremental-photoelectric-rotary-encoder-400p-r.html.md))

This is an industrial incremental photoelectric rotary encoder with aluminum material, metal shell and stainless steel shaft. It generates AB two-phase orthogonal...

## Pricing

- **Price:** $41.30 (inc GST) — $37.55 AUD, exc GST
- **Quantity discounts:** 6+ $35.67 (exc GST) · 12+ $34.16 (exc GST)

## Availability & dispatch

- Available with a lead time — expect dispatch between Aug 19 and Aug 24.

## How to buy

- **Build a cart:** compose `https://core-electronics.com.au/cart/link?items=SEN0230:1` (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/SEN0230:1.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

This is a high-quality, optical, rotary encoder with standard quadrature configuration. Each channel is 400 pulse/rev giving a combined maximum of 1600 edge/rev in dual-phase (4x) output. Use it for speed (angular velocity) or relative position measurement.

Outputs are open-collector (NPN), so you can connect them directly with a microcontroller (Arduino, STM32, PLC) with internal pull-up resistors enabled.

![](https://core-electronics.com.au/attachments/localcontent/quad-encoding-waveform_175832ece72.png)

 **Note:** If you want to visualise the output on an oscilloscope, you'll need pull-up resistors on the outputs.

## Specifications

- Supply Voltage: 4.8V ~ 24v
- Encoder Body Size: Φ39× 36.5mm
- Output Shaft Diameter: Φ6 × 13mm
- Outside Shaft Platform: Φ20 × 4.85 mm
- Fixing Holes Screws: M3
- Weight: 234 g
- Max speed: 5000 rpm
 
## **Documents**

- [Product WIKI ](https://www.dfrobot.com/wiki/index.php/Incremental_Photoelectric_Rotary_Encoder_-_400P/R_SKU:_SEN0230)
 
## Shipping List

- Encoder x1
- Encoder mounting bracket x1
- 6mm coupling x1
- Screw accessories x1
- 10K resistors x2

## Images

- [Product image 1](https://core-electronics.com.au/media/catalog/product/6/w/6w4a0532-900x600.jpg)