> **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: Analog Signal Isolator **Type:** Product page · **SKU:** DFR0504 · **Brand:** [DFRobot](https://core-electronics.com.au/brands/dfrobot-australia) **Page:** https://core-electronics.com.au/gravity-analog-signal-isolator.html ([markdown](https://core-electronics.com.au/gravity-analog-signal-isolator.html.md)) The Analog Signal Isolator can isolate analog signal and provide isolated power to sensors. It can effectively prevent sensor signal interference and apply to multi-parameter... ## Pricing - **Price:** $33.30 (inc GST) — $30.27 AUD, exc GST - **Quantity discounts:** 6+ $28.76 (exc GST) · 12+ $27.55 (exc GST) ## Availability & dispatch - In stock, ships same business day if ordered before 2PM (Australia/Sydney). - We can dispatch 2 today, and up to 300 more in 8–12 days. ## How to buy - **Build a cart:** compose `https://core-electronics.com.au/cart/link?items=DFR0504:1` (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/DFR0504:1.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 In many cases, electrical isolation is required to ensure the reliable operation of the sensors. Some sensors, such as pH sensors and conductivity sensors, will interfere with each other and do not measure properly in the same container when they connect to the same power. To ensure stable and reliable operation of the sensors with no interference, it is necessary to isolate the signal and the power. Gravity: Analog Signal Isolator is efficient in preventing the electrical interference between sensors. **This module has an onboard 5V isolation power which could directly supply to the sensor.** Therefore, you do not need to prepare the external power, such an easy and practical! The connector of wires are special designed for DFRobot 3Pin analog sensor, plug and play, no need for soldering. The analog signal transmission ratio is 1:1, which contributes to a very small impact on output signals of sensors when this module connect into the circuit. Furthermore, you do not need to change the code of the mainboard. This analog signal isolator is applicable to prevent interferences between sensors, such as a multi-parameter water quality monitoring system that need to prevent interferences between water sensors. ![Gravity: Analog Signal Isolator Interface - DFRobot](https://core-electronics.com.au/attachments/localcontent/DFR0504-Interface_981024731a5.jpg) *Gravity: Analog Signal Isolator Interface* This product is almost compatible with all analog sensors produced by DFRobot. It could satisfy varied demands in situations that require electrical isolation. - The MCU terminal (non-isolation terminal) should be provided with precise voltage of 5.0±0.1V. The higher the precision of input voltage, the higher the precision of analog output signal. - This module consumes relatively large current during operation, so you'd better to provide external power supply to Arduino board to guarantee enough power and voltage precision. - Please pay attention to the operating current of your sensor or module, the maximum output current from SEN terminal is 170mA. - The GND of the MCU terminal(non-isolation terminal) and the GND of SEN terminal (isolation terminal) are isolated from each other. Do not short circuit them. - It is normal for the isolator generates heat while working. ### Specification 9. Operating Voltage: 5.0V 10. Response Time: 4 seconds (Typ) 11. Analog Error between Two Terminals: <± 20mV (Typ) 12. Conector Type: PH2.0-3P 13. No-load Current: 75mA 14. Dimension: 42 \* 32mm / 1.65 \* 1.26 inch 15. Non-isolation Terminal (MCU Terminal) Supply Voltage: 5.0 ± 0.1V Analog Output: 0 ~ 5.0V 16. Isolation Terminal (SEN Terminal) Output Voltage: 5.0 ± 0.2V Analog Input: 0 ~ 5.0V Projects **Project 1. [How to use DFRobot Signal Isolator module with an Arduino](https://www.youtube.com/watch?v=I6dtIqxvIMc)**### Documents 20. [Wiki](https://wiki.dfrobot.com/Gravity__Analog_Signal_Isolator_SKU_DFR0504) 21. [Schematic](https://core-electronics.com.au/attachments/localcontent/Analog%20Isolation%20Module(V1_93709f34b9e.pdf) 22. [Layout](https://core-electronics.com.au/attachments/localcontent/Analog%20Isolation%20Module(V1_1936115d869.pdf) 23. [Datasheet](https://core-electronics.com.au/attachments/localcontent/Datasheet_31167460b1e.zip) ### Parts List 25. Gravity: Analog Signal Isolator x1 26. PH2.0-3P Cable x2 ## Images - [Product image 1](https://core-electronics.com.au/media/catalog/product/d/f/dfr0504-1.png)