GS-01 · Canopy unit

The Grow Sensor PRO

Name: The Grow Sensor PRO
Brand: Grow Sensor
Price: 779.0 USD
Availability: InStock

The canopy unit. Leaf temperature, true VPD, CO₂, humidity and light, measured at the plant with dedicated, factory-calibrated sensors. Add a substrate probe when you move to crop steering.

$779

$825

Pay in 4 interest-free instalments of $194.75 withshopPay

60-day money-back guarantee
2-year warranty
Ships to UK, EU, US, CA, AU, NZ

At the plant

The canopy is its own climate. Measure it.

The PRO hangs at canopy height and reads the leaf itself: infrared surface temperature, true VPD, and the light actually reaching the crop.

Grow Sensor PRO hanging at canopy height above flowering plants in a commercial grow room

Measurements

Twelve channels. No estimates.

Each from a dedicated sensor on the unit itself, never inferred. Root-zone channels come from a connected substrate probe, sold separately.

Climate & environment

Air temperature
Relative humidity
CO₂
Dew point
Atmospheric pressure
Ambient VPD

Light & photosynthesis

ePPFD (extended spectrum)
ePAR
eDLI

Plant response

Leaf surface temperature (IR)
True leaf VPD
Leaf-to-ambient differential
Plant VOCs — the nosesoon

Root zone

Water content
Substrate EC
Substrate temperature
Runoff pHsoon
Runoff ECsoon
Runoff volumesoon

Via a connected SDI-12 probe, sold separately.

The software half

Every channel, on one screen.

Readings land in the Grow app as split graphs: leaf VPD, CO₂ and the rest, with your limits drawn on them and an alert the moment a room leaves its band. Free, with unlimited history. No subscription.

The Grow app · iOS & Android · Free

Technical specification

Accuracy, published.

Sensing

Leaf surface temp (IR): −30–100 °C, ±0.5 °C
Air temperature: −9–58 °C, ±0.3 °C
Relative humidity: 10–95 %RH, ±0.3 %RH
CO₂ (NDIR): 400–5000 ppm, ±(40 ppm + 5 %)
Spectral range: 380–910 nm, ±2 nm per channel
ePPFD / ePAR: 400–750 nm
DLI accuracy: ±3 %

Power & connectivity

Input power: 5–12 V DC, USB option
Battery life: 2 weeks – 3 months
Wi-Fi: 2.4 GHz, up to 200 m line-of-sight
Offline logging: Yes
Sampling: Configurable, down to every 2 min

Physical & software

Mounting: Hanging clip + tripod mount
Housing: UV-resistant ASA, splash resistant
Environment: Indoor and greenhouse
Integrations: Home Assistant, API access
Apps: Android 9+, iOS 14+

Built for the room

Fanless, calibrated, runs for months.

No fan to foul or bias a reading. Every unit is verified end-to-end before it ships, then runs weeks to months on a battery, or wired over USB.

Infrared leaf sensor

Reads leaf surface temperature optically — no clip, no contact.

Vented base

Open cells let room air reach the sensors passively — nothing mechanical near the reading.

Long-range Wi-Fi

2.4 GHz with up to 200 m line-of-sight range — reaches the router from deep in the facility.

GS-01 underside: RJ12 and USB ports, sensor apertures, steel screws, and the brass mounting insert in the vented base — GS-01 — underside

RJ12 probe port

Underside RJ12 for a supported substrate probe via the connector block; readings land in the same app.

USB power

5–12 V over USB, or weeks to months on the battery.

Brass mounting insert

Threaded tripod mount, machined in. Or hang it from the cord.

In the box

What ships.

01Grow Sensor PRO
025 m USB power cable
03Reflective high-strength hanging cord with carabiner
04The Grow app, free with unlimited history (iOS & Android)
05Priority onboarding support

Compatibility

Works with what you run.

Plug a substrate probe into the PRO's underside RJ12 via the connector block: eight supported models, from SubSense to METER and Acclima. One connects at a time.

Supported substrate probes

Grow SubSense
Delta-T WET-150
Acclima TDR-310W
Acclima TDR-315N
METER Group TEROS 11
METER Group TEROS 12
METER Group SOLYX 14
Growlink Terralink

Integrations

Home Assistant, for automations off live readings
API access, for dashboards and custom logic
The Grow app (iOS & Android), free with unlimited history

The honest fit

Built for some rooms, not all.

For you if

You grow indoors and are judged on yield, quality and repeatability
You want canopy, climate and substrate data in one calibrated system, not scattered devices
You run multiple rooms, zones or cycles and want consistent targets
You steer on trends and alerts, not on feel

Not for you if

You grow outdoors only
You need a basic thermometer and hygrometer, nothing more
You want the lowest-cost monitor on the market
You don't plan to act on the data

Which one

Steering the root zone too?

The Grow Sensor system: SubSense substrate probe with steel prongs beside the GS-01 canopy unit, both cabled

The Grow Sensor PRO systemThe complete system adds the SubSense substrate probe: all fifteen channels, calibrated together, from day one.$899Save $163.99 vs buying separately

Tad Hussy
KisOrganics · Cannabis Cultivation and Science Podcast

FAQ

Before you order.

Yes. Every unit is tested end-to-end as an assembled device, not as loose components. Temperature and humidity are verified in a stable test chamber, with multi-point checks across temperature, humidity, PPFD and spectrum. Calibration and test certificates are available on request.

The Grow app is free with the sensor, with unlimited history. GrowOps, the desktop workspace for facility teams, is a separate paid subscription and entirely optional.

Hang the sensor above the canopy, connect it to 2.4 GHz Wi-Fi through the app, and readings start. No installer, no wiring. If the internet drops, the sensor logs offline and syncs when the connection returns.

The SubSense probe, plus a fixed list of SDI-12 models: Delta-T WET-150, Acclima TDR-310W and TDR-315N, METER Group TEROS 11, TEROS 12 and SOLYX 14, and Growlink Terralink. Every probe connects through the waterproof RJ12 connector block. One probe at a time.

60-day money-back guarantee: if you're not satisfied, email us within 60 days for a full refund. Every unit also carries a 2-year warranty against defects in materials and workmanship.

GS-01 · Canopy unit