> **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 pH Sensor / Meter Pro Kit V2 **Type:** Product page · **SKU:** SEN0169-V2 · **Brand:** [DFRobot](https://core-electronics.com.au/brands/dfrobot-australia) **Page:** https://core-electronics.com.au/gravity-analog-ph-sensor-meter-pro-kit-v2.html ([markdown](https://core-electronics.com.au/gravity-analog-ph-sensor-meter-pro-kit-v2.html.md)) DFRobot Gravity: Analog pH meter pro V2 is specifically designed to measure the pH of the solution and reflect the acidity or alkalinity. It is commonly used in... ## Pricing - **Price:** $109.95 (inc GST) — $99.95 AUD, exc GST - **Quantity discounts:** 6+ $94.95 (exc GST) · 12+ $90.95 (exc GST) ## Availability & dispatch - In stock, ships same business day if ordered before 2PM (Australia/Sydney). - We can dispatch 3 today, and up to 500 more in 8–12 days. ## How to buy - **Build a cart:** compose `https://core-electronics.com.au/cart/link?items=SEN0169-V2:1` (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/SEN0169-V2:1.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 DFRobot Gravity: Analog pH meter pro V2 is specifically designed to measure the pH of the solution and reflect the acidity or alkalinity. pH sensors are commonly used in various applications such as aquaponics, aquaculture, and environmental water testing. As an upgraded version of pH meter pro V1, the secondary generation pH meter pro greatly improves the precision and user experience. The onboard voltage regulator chip is compatible with both 5V and 3.3V logic from the main control board. The output signal is filtered by hardware and has low jitter. The software library adopts the two-point calibration method, and can automatically identify two standard buffer solutions (4.0 and 7.0) making calibration simple and convenient. It uses an industry-style electrode and has a built-in simple, convenient, practical connection and long life, very suitable for online monitoring. This industry-style pH combination electrode is made of a sensitive glass membrane with low impedance. It can be used in a variety of pH measurements with fast-response, good thermal stability, and reproducibility, and nearly eliminates alkali error. Between 0 to 14 pH range, the output voltage of the electrode is linear. The reference system which consists of the Ag/AgCl gel electrolyte salt bridge has a stable half-cell potential and excellent anti-pollution performance. The ring PTFE membrane is not easy to clog, so the electrode is suitable for long-term online detection. With this product, the main control board (such as an [Arduino](https://core-electronics.com.au/arduino-leonardo.html)), and the software library, you can quickly build the pH meter, plug-and-play. DFRobot provides a variety of water quality sensor products, uniform size, and interface, not only meet the needs of various water quality testing but also suitable for the DIY of multi-parameter water quality tester. The pH is a value that measures the acidity or alkalinity of the solution. It is also called the hydrogen-ion concentration index. The pH is a scale of hydrogen-ion activity in a solution. pH has a wide range of uses in medicine, chemistry, and agriculture. Usually, the pH is between 0 to 14. Under thermodynamic standard conditions pH is 7, which means the solution is neutral; pH < 7 means the solution is acidic, and pH > 7 means the solution is alkaline. **Attention:** **1. The BNC connector and the signal conversion board must be kept dry and clean, otherwise, it will affect the input impedance, resulting in an inaccurate measurement. If it is damp, it needs to be dried carefully to avoid damage.** **2. The signal conversion board cannot be directly placed on a wet or semiconductor surface, otherwise, it will also affect the input impedance, resulting in an inaccurate measurement. It is recommended to use the nylon pillar to fix the signal conversion board to allow a certain distance between the signal conversion board and the surface.** **3. The sensitive glass bubble in the head of the pH probe is delicate. Any damage or scratches will cause the electrode to fail.** **4. After completing a measurement, disconnect the pH probe from the signal conversion board to avoid extended exposure with the sample while power is applied, as this may damage the probe.** ![SEN0161-V2-Connection](https://core-electronics.com.au/media/wysiwyg/SEN0161-V2-Connection.jpg) **Arduino Connection Diagram** ### Features - Voltage: 3.3~5.5V - Hardware filtered output signal provides low jitter - Plug-and-play Gravity and BNC connectors - The software library supports two-point calibration and automatically identifies standard buffer solutions at pH 7.0 and 4.0 ### Specifications **Signal Conversion Board (Transmitter) V2** - Supply Voltage: 3.3~5.5V - Output Voltage: 0~3.0V - Probe Connector: BNC - Signal Connector: PH2.0-3P - Measurement Accuracy: ±0.1@25°C - Dimension: 42mm x 32mm / 1.66" x 1.26" **pH Probe** - Probe Type: Industrial Grade - Detection Range: 0~14 - Temperature Range: 0~60°C - Accuracy : ± 0.1pH (at 25°C) - Response Time: <1min - Probe Life: 24/7 > 0.5 years (approximation, depending on the water quality) - Cable Length: 5m ### Documents - [Product wiki](https://www.dfrobot.com/wiki/index.php/Gravity:_Analog_pH_Sensor/Meter_Kit_V2_SKU:SEN0161-V2) - [More Documents](https://www.dfrobot.com/wiki/index.php/Gravity:_Analog_pH_Sensor/Meter_Kit_V2_SKU:SEN0161-V2#More_Documents) ### Parts List - pH Probe (Industrial Grade) x1 - pH Signal Conversion Board V2 x1 - Gravity Analog Sensor Cable x1 - Waterproof Gasket x2 - Screw Cap for BNC Connector x1 - M3 \* 10mm nylon pillar x4 - M3 \* 5mm screws x8 ## Images - [Product image 1](https://core-electronics.com.au/media/catalog/product/s/e/sen0169-v2-1.jpg)