pH Doser
Electrically isolated, high-impedance pH measurement and precision peristaltic dosing with proportional control logic.
Ships with a double-junction silver nitrate probe. Also compatible with BlueLab, Dosatron, and any professional-grade pH electrode.
Encrypted SMS and telephone voice alerts when parameters exceed your thresholds.
Pay by card, Apple Pay or Google Pay. Free shipping. Prices in AUD.
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 1 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 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
Calculate ΔpH between current reading and setpoint
Larger deviation = larger dose. Small deviation = micro-dose. Approaching target = hold.
System tracks cumulative doses and adjusts for decreasing reservoir volume
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.
Hardware & Connectivity
Processing & Wireless
- • Dual-core 240 MHz microcontroller — substantial processing headroom for real-time control, data logging, and over-the-air firmware updates
- • 2.4 GHz WiFi (802.11 b/g/n) — better range and wall penetration than 5 GHz, which is what you want in a room full of foil, concrete, and running motors
- • 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 — when the sensors report lights-off, indicator LEDs stay off completely and the display goes black, so the equipment can't pollute 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.
On-Device Touchscreen
A capacitive touchscreen with a custom interface. Responsive, smooth, with real-time graphs and direct control — works like a smartphone.
Left idle, it switches to a screensaver that renders the numbers large and high-contrast, so you can read your pH from across the room without hunting for your glasses.
During a dark cycle the screen goes fully black rather than dimming. Touch it to wake it if you need to, or leave it dark and do everything from the app.
Everything on the screen is also in the web interface and mobile app, so the display is there for on-site interaction rather than as the only way in.
One Model
Printed in PLA. Built to Be Repaired.
The enclosure is 3D printed in PLA, a bioplastic made from plant starch. It's mostly polylactic acid, with a small fraction of polymer impact modifiers blended in so it prints cleanly and stands up to years in a warm, humid room. Those modifiers are polymers, not the free-floating phthalate plasticisers that make up to 40 percent of flexible PVC, and there are no bisphenols because PLA isn't a polycarbonate.
Every device carries a five-year warranty, and every part in it is user-replaceable. We sell the circuit boards, the printed cases and the individual parts, so if something does fail outside the warranty you fix it cheaply instead of replacing the device. We'd like you to still be running this in ten years.
Why we build from bioplasticReady to upgrade your pH control?
$1,700 with double-junction probe included, 2 week lead time. Shipping worldwide.