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Open Source pH, conductivity & temperature monitor and development board

Nectar Monitor

The Nectar Monitor is an open-source pH, conductivity and temperature probe development board powered by an ESP32 and easily programmable and customizable through Arduino IDE. Designed for accuracy, stability and affordability the Nectar Monitor is loaded with features typically found in high-end pH and conductivity monitors.

Geared towards beginners, enthusiasts and professionals alike, you can easily use the Nectar Monitor right out of the box with the included firmware to read and monitor pH, conductivity and temperature in real time over your local Wi-Fi connection. Alternatively, you can quickly tap into one of the hardware(i2c & UART) or software APIs to tie into larger custom hydroponic automation or water analysis projects.

A few of of the key features of Nectar Monitor include its Universal Probe Compatibility, allowing the use of nearly any off-the-shelf BNC pH and conductivity probe. Both the pH and conductivity probe circuitry are electrically isolated and designed for continuous submersion and 24/7 readings, while minimizing wear and tear on the probes. Its simple, fast, and open calibration sequence can automatically detect standard calibration solutions for quick calibration with the push of a button.

The circuit board fits into a standard Polycase LP-61 project box or 3d print your own and includes button and display pin connections so you can quickly and easily assemble your own pH, conductivity and temperature monitor at a fraction of the cost. Alternatively, with fully accessible hardware schematics and source code, and easy-to-integrate i2c, UART or websocket APIs, our platform empowers users to innovate and customize their own water analysis and hydroponic automation projects.

Available Q3 2024

Open-Source, Wifi-Connected, and Feature-Packed

The Nectar Monitor's open-source firmware is loaded with professional features to make it simple to use right out of the box, or customize for your use-case.

Universal Probe Compatibility: Use almost any off-the-shelf pH and conductivity probes with standard BNC probe connections.

Simple, fast and open calibration: Calibrate your probes easily using any standard pH or conductivity calibration buffer solution. Common buffer solutions are automatically detected by the Nectar Monitor for simple, quick calibration.
Automatic Temperature Compensation: Toggleable automatic temperature compensation for pH and electrical conductivity ensures that readings are accurate and responsive to environmental changes.
Real-Time Monitoring: Provides continuous feedback, vital for sensitive aquatic ecosystems or larger water chemistry monitoring & automation projects.
Persistent Calibration: The calibration data is automatically saved, ensuring that your monitor is always ready to go with calibration settings that persist across reboots and power-loss.
Enhanced Longevity with Electronic Isolation: The Nectar Monitor includes electrically isolated pH and EC probe connections, designed so that the probes can be continuously submerged for 24/7 monitoring without excess wear and tear.

Seamless Integration and Automation

Easy Integration: UART, i2C 3.3v and 5v pins make it easy to integrate the Nectar Monitor with larger water monitoring and automation projects.

High-Resolution Conversion: With 12-bit conductivity and 24-bit pH circuit analog-to-digital converters, you can trust the data you receive.
Wi-Fi Convenience: Simple Wi-Fi setup and configuration through your phone. View and monitor data on your phone or desktop through your local network using the firmware's websocket APIs, or add your own custom integrations like Home Assistant.
Websocket APIs: View and monitor data on your phone or desktop on your local network, or add your own custom integrations.
Automated Conversions: Convert the conductivity data into your choice of units, offering EC, PPM 500-scale and PPM 700-scale readings. The raw ph probe voltage and conductivity probe admittance readings are also available for advanced users, of course!

Nectar Display Hat

The optional Nectar Display Hat is designed to easily connect to the Nectar Monitor through the main pin header and includes 3 displays for pH, conductivity and temperature as well as status LEDs for the display scale, calibration state, ATC and device status. It also includes easy-to-use on-board buttons and solder pads to connect waterproof, tactile buttons flush to a faceplate.