Grow room monitoring for commercial facilities

Your best run, every run.

Grow Sensor monitors every condition in your rooms in one calibrated system, so the magic behind your best harvest stops being a mystery.

Measuring rooms at

01 — The problem

One bad run is all it takes.

Prices are falling in every market. Canada is down 50 % in five years, Germany 40 % in two, the US further still. Only premium flower holds its price. Data is the difference.

Every gram counts.

Margins no longer forgive mids. Profit is pulling the most quality from every pheno, every cycle. Every point of quality left in the room is margin lost.

Inconsistency kills.

Same genetics, different weight. It's rarely one mistake. It's a thousand small decisions made by feel, with no system holding them together.

Adapt or die.

Growing is hard and getting harder. One in four US cultivation licenses has disappeared in two years. The ones still growing put data first.

02 — The fix

Read the room.

Grow Sensor measures everything in the room and more: direct plant response, climate, light and substrate. So you focus on growing quality instead of guessing.

More grams per watt.

Up to 50 % more yield in your first run, depending on the pheno. See what every watt returns, and stop leaving margin in the room.

Dial in phenos, double speed.

A pheno that took six runs to dial in can now take three. With better crop steering, take two weeks back on every cycle.

Keep the lights on.

Only premium holds its price. Consistency is a data problem: solve it and outlast the shakeout.

03 — The system

The new standard, in hardware.

Facility-grade hardware for canopy, climate and root zone, ready for scale. An expandable range with runoff sensing, VOCs and irrigation control already in development.

GS-01

Grow Sensor PRO

Canopy climate: leaf temperature, true VPD, CO₂, humidity, light. Hangs above the canopy; underside RJ12 for a substrate probe via the connector block; runs weeks to months on a battery, or over USB.

GS-SUB

SubSense probe

Root zone: water content, EC and temperature in the media. Connects to the Grow Sensor PRO via the RJ12 connector block.

GS-SDI

SDI-12 connector

Waterproof RJ12 connector block. Required to plug any supported substrate probe into the RJ12 port on the underside of the Grow Sensor PRO.

APP

The Grow app

Every reading, every room, on your phone, with alerts before problems become losses. Free, no subscription, ever.

OPS

GrowOps desktop

The facility view: every room and every run side by side, for teams that steer more than one door.

IN DEVELOPMENT — runoff sensing (pH, EC, volume), irrigation control, and plant VOC sensing, measuring into the same app.

04 — Hardware / GS-01

Factory-calibrated. Built to last.

Fanless by design

Shaped to draw air across the sensors on its own. No fan to fail, foul, or bias a reading.

Offline logging

Network drops, the sensor keeps logging. Nothing lost.

GS-01, the Grow Sensor: a matte white instrument with a vented base and a single button, photographed head-on
Fig. 01 — GS-01, the Grow Sensor PRO

VOC sensing

Reads the compounds plants emit, for early stress and ripening cues.

Battery or USB

Two weeks to three months on a charge, or run it wired.

Connectivity
2.4 GHz Wi-Fi
Power
Battery / 5–12 V USB
Mounting
Hanging mount · tripod mount
Rating
Splash resistant

05 — Measurements

Fifteen channels. One calibrated system.

Every channel is calibrated at the factory and stated with its tolerance — because a number without an accuracy is a guess.

CH 01

Leaf temperature

Transpiration is driven by the leaf, not the air. This is the number every serious VPD target is built on.

Range
−30–100 °C
Accuracy
±0.5 °C
Method
IR thermopile

CH 02

Air temperature

The baseline. Compared against leaf temperature to expose transpiration stress before it's visible.

Range
−9–58 °C
Accuracy
±0.3 °C
Method
Digital, dedicated

CH 03

Relative humidity

The other half of VPD. Small errors here compound into wrong irrigation and mold risk calls.

Range
10–95 %RH
Accuracy
±0.3 %RH
Method
Capacitive

CH 04

CO₂

Photosynthesis ceiling. Reveals whether enrichment is reaching the canopy or pooling at the floor.

Range
400–5000 ppm
Accuracy
±40 ppm + 5 %
Method
NDIR

CH 05

Light (ePPFD / ePAR)

What actually lands on the leaf, resolved by band (blue, green, red, far-red) and mapped against your dimming schedule and DLI target.

Range
400–750 nm
Accuracy
±3 % DLI
Method
Spectral, 380–910 nm

06 — GrowOps — for facilities

Every room. Every run. One workspace.

GrowOps is the desktop workspace for multi-room facilities: advanced analytics, multiple sensors per room, full history across rooms and runs, custom recipes, crop registration.

Grows

⌘K
ViewSortFilters

OG Kush

Flower 2Flower · Day 342 min ago2 alerts

Humidity

73.6%

55 – 65 %

Amb VPD

0.82kPa

1.0 – 1.3 kPa

CO₂

1180ppm

1000 – 1250

ePPFD

842µmol

800 – 900

Temperature

26.2°C

25 – 28 °C

Gelato 41

Veg 1Veg · Day 211 min ago0 alerts

Humidity

62.4%

60 – 70 %

Amb VPD

0.94kPa

0.8 – 1.1 kPa

CO₂

880ppm

800 – 1000

ePPFD

610µmol

550 – 700

Temperature

25.1°C

24 – 27 °C

Every room, one screen

Group sensors by room and zone, standardise targets, with full history across rooms and runs.

Custom recipes

Build recipes visually: targets and limits for every phase of the grow. Repeat the run that worked, and dial in the next pheno faster.

Crop registration

Diary entries and measurements logged against every grow, with who and when attached. Retire the spreadsheet.

07 — The Grow app

Your whole grow, on one graph.

The same data, in your pocket. Every channel on one live graph, your limits drawn on it, and an alert the moment a room leaves its band. Set a sensor up in minutes and watch the room from anywhere.

iOS & Android · Free

Grows

OG Kush

Flower 2
2 alertsFlower · Day 343 min ago
Humidity73.6%
Amb VPD0.82kPa
CO₂1180ppm
ePPFD842µmol
Temperature26.2°C

Gelato 41

Veg 1
0 alertsVeg · Day 211 min ago
Humidity62.4%
Amb VPD0.94kPa
Temperature25.1°C

Zkittlez

Flower 1
0 alertsFlower · Day 122 min ago
Humidity68.1%
Amb VPD1.05kPa
CO₂1120ppm
Temperature26.8°C

OG Kush

GraphRecipeSpec…
PhasesLimits

Prep

14d

Veg

21d

Stretch

14d
Temperature
Temperature
Rel humidity
Rel humidity
Amb VPD
Amb VPD
CO₂
CO₂
Fig. 03 — The Grow app: grows, live graph, recipe

Free with every sensor, no subscription, and your data stays yours to export. GrowOps runs the building; the app keeps a room in your hand.

08 — The return

Measurement that pays for itself.

Quality, yield, and return on investment are measurement problems wearing different names. Fix the measurement and all three move.

up to 50 %+yield

Your genetics were never the limit. Give a pheno the right system and watch what the cut can really do. Reported by growers on their first full run.

2 hrsback per grower, every day

That's up to 500 hours a year, per grower, off the manual checks and admin. More time with the plants, less with the paperwork.

1 harvestpayback

One harvest covers the system, even in a small room. Every run after that, the return just stacks.

09 — Case study / Legacy AG

“No BS — it's the only sensor system I need.”

“Leaf temp and VPD, PPFD, CO₂, plus my Teros 12, all in one place. The best terps are coming from the rooms where the Grow Sensor is running.”

Inside Legacy AG — a monitored flowering room mid-run
Fig. 05 — Inside Legacy AG, mid-run
Ben, head grower at Legacy AG

Ben

Head grower, Legacy AG (NZ)

Operation
Legacy AG · New Zealand
Grower
Ben, head grower
Setup
GS-01 + SubSense + Teros 12, one system

10 — In the field

Trusted where the lights never turn off.

Nichilas Ezzo

Nichilas Ezzo

Head grower, FarmaceuticalRX

“I've never second guessed the readings.”

Nate Lipton

Nate Lipton

CEO, GrowersHouse & CannaCribs

“The user-friendly tool that helps professional growers sleep well at night.”

Tad Hussy

Tad Hussy

KisOrganics · Cannabis Cultivation and Science Podcast

“It tracks the metrics that actually matter and brings real clarity to my grow environment.”

11 — Questions

Asked before ordering.

Straight answers, in order of how often each one blocks the purchase.

Yes: growers report gains of up to 50 % in their first full run. The gains come from catching issues early, dialing VPD and irrigation, and repeating what works. Model your own payback with the ROI calculator, on your canopy and your crop value.

Hardware is priced on the shop — sensors and probes are one-off purchases, no contract. GrowOps is quoted per facility: canopy size, rooms, sensor count, installation and support all move the number. Book a demo and we'll price your exact setup.

One sensor per 600 sq ft of canopy is the absolute minimum; multi-tier racks, several phenos in one room, and tighter steering all push the count up. Substrate: one probe per 100 sq ft or per irrigation zone. Send us your layout and budget and we'll spec the right density.

Fully. Send us your blueprints and we'll advise on sensor density and placement against cost; for larger deployments we'll come and set up on site. Whatever it takes to fit the system to your facility.

The Grow app is free with your sensor: unlimited history, alerts, no fees. GrowOps is the one optional paid subscription, the desktop workspace for professional teams. It covers multiple rooms and sensors, cultivars, custom recipes, crop registration, and shared team accounts with role-based access across organisations and facilities.

Yes. GrowOps supports multiple organisations, multiple facilities per organisation, and role-based access for every team member. Everyone sees the rooms they should, nothing they shouldn't.

Yes: every unit is tested end-to-end as an assembled device, with multi-point verification across temperature, humidity, PPFD and spectrum. Calibration and test certificates are available on request.

Yes. Home Assistant works today, so readings can drive your fans, dehumidifiers, CO₂ and lighting. Full API access is available for custom systems, and our own irrigation controller is in development.

You do. It's encrypted in transit and at rest, never sold or shared, and exportable via API or CSV whenever you want it.

Sixty-day money-back guarantee: email us and we'll refund in full. Hardware carries a two-year warranty against defects.

Stop guessing. Start measuring.

Sixty-day money-back guarantee. Two-year warranty. Free app included.

Ready to buy? Order Grow Sensor