> **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 # Gravity: Heart Rate Monitor Sensor For Arduino **Type:** Product page · **SKU:** SEN0203 · **Brand:** [DFRobot](https://core-electronics.com.au/brands/dfrobot-australia) **Page:** https://core-electronics.com.au/gravity-heart-rate-monitor-sensor-for-arduino.html ([markdown](https://core-electronics.com.au/gravity-heart-rate-monitor-sensor-for-arduino.html.md)) The DFRobot heart rate sensor is a thumb-sized heart rate monitor designed for Arduino microcontrollers. ## Pricing - **Price:** $26.90 (inc GST) — $24.45 AUD, exc GST - **Quantity discounts:** 6+ $23.24 (exc GST) · 12+ $22.25 (exc GST) ## Availability & dispatch - In stock, ships same business day if ordered before 2PM (Australia/Sydney). - We can dispatch 2 today, and up to 250 more in 8–12 days. ## How to buy - **Build a cart:** compose `https://core-electronics.com.au/cart/link?items=SEN0203:1` (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/SEN0203:1.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 The DFRobot heart rate sensor is a thumb-sized heart rate monitor designed for Arduino microcontrollers. This sensor is a pulse sensor which is developed based on PPG ([PhotoPlethysmoGraphy](https://en.wikipedia.org/wiki/Photoplethysmogram)) techniques. This is a simple and low-cost optical technique that can be used to detect blood volume changing in the microvascular bed of tissues. It is relatively easy to detect the pulsatile component of the cardiac cycle according to this theory. The sensor has two holes that you can use to attach to your belt. You can wrap on your finger, wrist, earlobe or other areas where it has contact with skin. To ease the difficult of using this sensor, a [Gravity ](https://www.dfrobot.com/gravity)Interface is adapted to allow plug&play. The [Nano I / O Shield For Arduino Nano](https://core-electronics.com.au/nano-i-o-shield-for-arduino-nano.html) is the best match for this sound senor connecting to your [Arduino](https://www.dfrobot.com/index.php?route=product/category&path=35_104) or other microcontroller. As this sensor can work at 3.3V which make it compatible with [Raspberry Pi](https://core-electronics.com.au/raspberry-pi.html), [intel edison](https://www.dfrobot.com/index.php?route=product/category&path=184_187), joule and curie. ![Gravity: Heart Rate Monitor Sensor For Arduino Demo Project 2](https://core-electronics.com.au/attachments/localcontent/DFRobot_Heart_Rate_Sensor_6614944d750.jpg) ![Gravity: Heart Rate Monitor Sensor For Arduino Demo Project 1](https://core-electronics.com.au/attachments/localcontent/DFRobot_Heart_Rate_Sensor_Arduino_Connection_5476075cdee.jpg) NOTE: 1\. This product is NOT a professional medical device and should not be used to diagnose or treat medical conditions. 2\. This sensor is designed to work when the user is not moving. If used while moving it will give inaccurate results. ## Specification - Input Voltage (Vin): 3.3 - 6V (5V recommended) - Output Voltage: 0 - Vin (Analog), 0/ Vin (Digital) - Operating current: <10mA - Dimension: 28 x 24(mm), 1.102" x 0.945"(in) - Interface Type: PH2.0-3P ## Documents - [Product WIKI](https://wiki.dfrobot.com/Heart_Rate_Sensor_SKU__SEN0203) - [Related Documents ](https://wiki.dfrobot.com/Heart_Rate_Sensor_SKU__SEN0203#target_5) ## Parts List - Heart Rate Monitor Sensor For Arduino x1 - Wrist belt x1 - PH2.0-3P cable x1 ## Images - [Product image 1](https://core-electronics.com.au/media/catalog/product/s/e/sen0203.jpg)