Available now — 2 week lead time

pH Doser

Electrically isolated, high-impedance pH measurement and precision peristaltic dosing with proportional control logic.

Designed for double-junction silver nitrate probes. Compatible with BlueLab, Dosatron, and any professional-grade pH electrode.

Encrypted SMS and telephone voice alerts when parameters exceed your thresholds.

$1,400 headless single channel

$1,800 with touchscreen · $3,400 dual channel with display

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The Analog Front End

pH electrodes are high-impedance voltage sources. The glass membrane that makes pH measurement possible also means the signal is extremely fragile — electrode impedances typically sit in the hundreds of megaohms to gigaohm range. Most consumer pH meters cut corners here. We don't.

Our front end uses full electrical isolation with an input impedance exceeding 10 GΩ — high enough to properly interface with laboratory-grade electrodes without signal degradation. This allows us to support double-junction, silver nitrate reference probes — the type used in professional and scientific applications.

The result is accurate, stable pH readings that don't drift or suffer from noise — even in electrically noisy environments with pumps, solenoids, and other equipment running on the same circuits.

Why This Matters

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Double-junction probes resist contamination
The secondary junction acts as a barrier, dramatically extending probe life in nutrient-rich solutions
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Silver nitrate reference = stable readings
Silver/silver chloride references maintain consistent potential over time, unlike cheap gel-filled electrodes
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Electrical isolation eliminates ground loops
No interference from pumps, solenoids, or other equipment sharing your electrical system

How It Works

Measure deviation from target

Calculate ΔpH between current reading and setpoint

Calculate proportional dose

Larger deviation = larger dose. Small deviation = micro-dose. Approaching target = hold.

Factor in estimated volume

System tracks cumulative doses and adjusts for decreasing reservoir volume

Execute via peristaltic pump

Precision pump allows exact volume delivery — no guesswork

Proportional Dosing Logic

Most pH dosers operate on fixed-dose logic: if pH deviates from target, dump X millilitres. Wait. Repeat. This works, but it's crude — you overshoot, undershoot, oscillate around your setpoint.

Our system uses subtractive proportional logic. The dose volume scales with the deviation from target. Far from setpoint? Larger dose. Close to setpoint? Micro-dose. At setpoint? Hold.

The algorithm also estimates remaining reservoir volume based on cumulative dosing history, adjusting its calculations as your water level drops. Pair with our optional water level sensor for exact volume tracking.

Precision Peristaltic Pumps

Peristaltic pumps deliver exact volumes by displacing fluid through flexible tubing. No contamination between pump mechanism and fluid. No priming. Consistent delivery regardless of viscosity.

±0.5ml

Dosing precision per cycle

Tracked

Cumulative pH solution usage logged

Alerts

Low solution warnings before you run out

Hardware & Connectivity

Processing & Wireless

• ESP32-P4 dual-core 400MHz microcontroller — substantial processing headroom for real-time control, data logging, and over-the-air firmware updates
• WiFi 6 (802.11ax) for improved range and connection stability in RF-noisy grow environments
• Bluetooth Low Energy fallback — direct device control if WiFi or internet fails
• Standard 5V USB power — lose a power supply? Any phone charger will work as a replacement
• Dark room aware — indicator lights automatically dim when sensors detect lights-off, protecting your dark cycle

Access From Anywhere

• TLS-encrypted connection to our servers — monitor and control from any phone, tablet, or computer, anywhere in the world
• Local-first when you're home — on the same network, the device responds directly without round-tripping through the internet
• SMS and phone call alerts — enter your phone number, set your thresholds, and get notified immediately if parameters go out of range
• Historical graphs included — 48 hours of real-time data and 7 days of aggregated data, free, no subscription
• Web app works on any browser. Native Android and iOS apps available.
• No subscriptions. No monthly fees. One purchase, lifetime access.

Optional Touchscreen

The display model includes a capacitive touchscreen with a custom interface. Responsive, smooth, with real-time graphs and direct control — works like a smartphone.

Or skip the screen entirely and use our web interface or mobile app. The headless unit is functionally identical — the display is purely a convenience for on-site interaction.

Headless (single channel) $1,400

With touchscreen (single) $1,800

Dual channel with display $3,400