The Grow Sensor PRO system
The Grow Sensor PRO system
★★★★☆ 4.6 on Trustpilot (26 reviews)
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Estimated delivery: Mar 28 - Apr 01
The complete canopy-level monitoring system for serious growers & craft facilities. Get consistent yield, higher terpene output and repeatable performance across rooms.
Measure PAR, full light spectrum, CO₂, temperature, humidity, VPD, true leaf temperature and root zone conditions — all in one integrated system.
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Is the PRO right for you?
Is the PRO right for you?
This system is for you if:
- You grow indoors and care about yield, quality and repeatable results
- You want canopy, climate and substrate data in one calibrated system, not scattered devices
- You run multiple plants, zones or cycles per year and want consistent targets
- You make decisions based on trends and alerts, not assumptions
- You want to standardise performance across a room, not just monitor one plant
This is built for serious growers who treat their grow like a controlled environment, not a guessing game.
It may not be for you if:
- You grow outdoors only
- You’re looking for the lowest-cost monitoring option
- You only need a basic thermometer and hygrometer
- You prefer “set and forget” monitoring and don’t plan to act on the data
Grow Sensor PRO is designed for growers who actively refine and improve each run. If you’re focused on optimisation and consistency, it’s built for you.
Product description
Product description
The Grow Sensor is built to measure the grow as a system, not as disconnected readings.
Most grow room tools measure individual variables in isolation, air temperature on a wall, humidity away from the canopy, light at a single point. Some values are averaged across the room, others inferred, and very few are measured where the plant actually lives.
The Grow Sensor system captures canopy-level measurements together, at the same time, using dedicated, factory-calibrated sensors, while root zone conditions are measured directly in the substrate using the included SubSense probe.
No inferred values.
No room-level averaging.
Just direct measurement across the whole grow system.
This makes cause and effect visible.
You can see how environmental changes influence plant response, how shifts in climate affect VPD and transpiration, and how irrigation decisions show up in the root zone.
That’s what removes blind spots, shortens the learning curve, and makes repeatable results possible.
What it measures
Climate & environment
- Air temperature
- Relative humidity
- CO₂
- Dew point
- Atmospheric pressure
- Ambient VPD
Light & photosynthesis
- ePPFD (extended spectrum)
- ePAR (extended spectrum)
- eDLI (extended daily light integral)
Plant response
- Leaf surface temperature (infrared)
- True leaf VPD (not estimated)
- Leaf-to-ambient temperature differential
Substrate & root zone (via SubSense)
- Substrate EC
- Water content
- Substrate temperature
In addition to the included SubSense probe, Grow Sensor PRO supports a limited selection of specific SDI-12 substrate probe models. See technical specifications for the full compatibility list.
All sensors are factory calibrated before shipping to ensure long-term accuracy and consistency.
Designed for real grow rooms
- Long battery life, typically 2 weeks to 3 months depending on settings
- USB power option
- 2.4 GHz WiFi connectivity
- Offline data logging if internet is unavailable
- Tripod mountable
- Compact form factor suitable for micro grows
- Home Assistant compatibility
- API access
Built for how growers actually work
The Grow Sensor app and GrowOps platform are built for clarity, speed and practical decision-making.
Explore fast, responsive graphs that make trends and cause-and-effect obvious. Set limits on any metric and receive alerts when conditions drift. Track each grow cycle with structured, professional logging.
Everything is designed to stay out of your way, so you can focus on growing, not fighting software.
What's in the box
What's in the box
- Grow Sensor PRO
- SubSense substrate probe
- SDI-12 connector block
- 5 m USB power cable
- Reflective high-strength hanging cord with carabiner
- Access to the Grow Sensor app with unlimited historical data (iOS & Android)
- 1 year of GrowOps, pro grow diary and crop tracking platform
- Priority onboarding support
Tech spec
Tech spec
Ambient temperature
- Operating range: -9°C to 58°C (15.8°F to 136°F)
- Accuracy: ±0.3°C (±0.5°F)
Relative humidity
- Operating range: 10% to 95% RH
- Accuracy: ±0.3% RH (typical)
Leaf surface temperature (IR)
- Measurement range: -30°C to 100°C (-22°F to 212°F)
- Accuracy: ±0.5°C (±1°F)
CO₂ sensing
- Measurement range: 400 to 5000 ppm
- Accuracy: ±40 ppm + 5%
Light & spectral sensing
- Spectral range: 380 to 910 nm
- Wavelength accuracy: typically ±2 nm per channel
Photosynthetically relevant ranges
- ePPFD / ePAR: 400 to 750 nm
- Blue: 400 to 499 nm
- Green: 500 to 599 nm
- Red: 600 to 699 nm
- Infrared: 700 to 799 nm
DLI
- Accuracy: ±3%
Substrate integration
SDI-12 compatibility: Yes (supports one substrate probe at a time. Soon to be multiple)
Included probe: Grow SubSense
Additional supported substrate probes:
- Delta-T WET-150
- Acclima TDR-310W
- Acclima TDR-315N
- METER Group TEROS 11
- METER Group TEROS 12
- Growlink Terralink
Compatibility is limited to the models listed above.
Sensor architecture
Grow Sensor PRO uses dedicated, independent sensors for each critical measurement, rather than combined or inferred readings.
- Digital temperature and humidity sensors
- Non-dispersive infrared (NDIR) CO₂ sensor
- Infrared thermopile for leaf surface temperature
- Multi-channel spectral sensor for extended PAR and DLI
- External SDI-12 substrate probe for root zone measurements
All sensors are factory calibrated before shipping to ensure accuracy and consistency over time.
Power & connectivity
- Input power: 5 to 12 V DC
- Battery life: 2 weeks to 3 months (depending on measurement frequency)
- WiFi: 2.4 GHz
- WiFi range: up to 200 m line-of-sight (environment dependent)
- Offline data logging: Yes
- Sampling rate: configurable, down to every 2 minutes
Physical & environmental
- Mounting: Top-mounted hanging clip and bottom-mounted tripod mount
- Use case: Indoor and greenhouse environments
- Water resistance: Splash resistant
Software & compatibility
- Home Assistant: Yes
- Android: Android 9 or later
- iOS: iOS 14 or later
Warranty & services
- 2-year warranty
- 60-day satisfaction guarantee
Import fees covered up to £100
Import fees covered up to £100
Ordering from abroad? We’ll cover up to £100 / $125 / €115 in import fees. If you’re charged, just send us the receipt and we’ll refund you.
We currently ship to UK, all of the EU, US, Canada, Australia and New Zealand.
Any questions on click chat below.
Share this product
Trusted by growers worldwide
Nate Lipton
"The user-friendly tool that helps professional growers sleep well at night."
Tad Hussy
“It tracks the metrics that actually matter and brings real clarity to my grow environment.”
Ben (NZ)
“No BS, this is the only sensor I need.”
Chad Westport (USA)
“Easy to set up, easy to use, and the insights make it easy to dial in your environment.”
True Canna Cast Podcast
“It’s like having a second set of eyes on my garden at all times.”
Ian collins (UK)
“I usually ditch tech when it gets frustrating, this was up and running in minutes.”
Nichilas Ezzo (US)
“I’ve never second guessed the readings.”
Christoph Herzog (Germany)
“The measurements are consistently accurate.”
Ryan (USA)
“Intuitive design, built with the grower in mind.”
What Grow Sensor PRO measures
Measure your grow as a system
Know your lights
Measure PPFD, spectrum and ldaily light integral (DLI) live, so you can hit your light targets and keep daily light consistent.
Accurate climate data
Calibrated canopy climate data you can trust, accurate humidity, temperature, CO₂ and VPD where it maters most.
Humidity accuracy: ±0.3% RH (typical)
Measure plant stress, live.
Measure leaf temperature continuously and get true leaf VPD, a direct window into plant stress and transpiration, 24/7.
Steer irrigation with real root zone feedback.
Monitor EC, moisture and temperature in the substrate to track drybacks, confirm irrigation strategy and catch issues early.
Access the free Grow app
No outdated dashboards or slow, cluttered interfaces. Just fast graphs, reliable alerts, and unlimited history with no subscription.
You can’t control what you don’t measure.
Stop guessing. Start measuring
Grow Sensor PRO gives you calibrated, canopy and root zone data on light, climate and plant response, so you can improve yield, quality and consistency.
Grow Sensor FAQs
Is Grow Sensor PRO right for me?
Is Grow Sensor PRO right for me?
Grow Sensor PRO is built for serious indoor growers who care about precision, quality and repeatability.
It’s right for you if:
- You want accurate, canopy and substrate-level data, not assumptions or averages
- You care about yield, product quality and consistency
- You value reliable, modern software that’s actually enjoyable to use
- You actively refine each cycle instead of repeating the same setup
- You’re passionate about your craft and make decisions based on data
It may not be the right fit if:
- You grow outdoors only
- You only need basic temperature and humidity monitoring
- You’re looking for the lowest-cost option
- You don’t plan to adjust your environment based on insights
Grow Sensor PRO isn’t a basic room monitor. It’s a full-system measurement tool designed for growers who want accurate data, dependable software, and repeatable results.
Will Grow Sensor PRO actually improve yield or quality?
Will Grow Sensor PRO actually improve yield or quality?
Grow Sensor PRO doesn’t improve yield or quality on its own, it gives you the visibility needed to make better decisions.
By measuring light, climate, plant response and root zone conditions together at canopy level, it helps you identify constraints that are easy to miss with basic room sensors. This often leads to improvements in environmental stability, crop steering and overall consistency.
Most growers see benefits in the form of:
- More stable environments
- Better control over stress and VPD
- Improved consistency between runs
- Higher-quality harvests and, in many cases, increased yield
The biggest gains typically come from learning faster and avoiding repeated mistakes, making strong results easier to repeat over time.
You can see real-world experiences and results in the testimonials above.
Are there any import duties or tariffs to pay?
Are there any import duties or tariffs to pay?
If you’re ordering from outside the UK, local duties or taxes may apply depending on your country.
To reduce the risk, we’ll cover up to £100 / $125 / €115 in import fees. If you’re charged, simply send us the receipt and we’ll refund you.
Estimated charges (as of 28 May 2025) are:
- Australia: ~AUD $75 (10% GST)
- Canada: CAD $80–130 (GST/HST + processing fee)
- European Union: €145–190 (VAT + handling fee)
- New Zealand: ~NZD $135 (GST + entry fee)
- United States: ~USD $75 (10% import tariff)
- United Kingdom: No additional charges. All taxes and duties are included in the listed price.
Import fees are typically collected by the courier before or at delivery.
Are there any subscription fees?
Are there any subscription fees?
The Grow App is free to use with your Grow Sensor. Premium features, such as AI insights, may require a subscription in the future.
Do you have a satisfaction Guarantee?
Do you have a satisfaction Guarantee?
Yup, read that here.
We are confident in the quality of our products and firmly believe that you will be delighted with your purchase.
However, we understand that sometimes things may not go as planned.
That's why we offer our 60-day money-back guarantee, so there's no need to worry.
Simply send us an email at hi@growsensor.co, and we'll take care of everything for you.
We'll promptly process a refund for the full purchase price, which will be promptly credited back to your original payment method.
Your satisfaction is our utmost priority, and we'll ensure that you're a happy customer!
Where do you ship to?
Where do you ship to?
Currently we ship to the UK, EU, US, Aus and Canada. If you want a Grow Sensor and live outside of these areas, please contact us. We'll be adding more countries soon.
Is the Grow Sensor calibrated before shipping?
Is the Grow Sensor calibrated before shipping?
Yes! Every Grow Sensor undergoes extensive calibration to ensure you can trust your device.
Do you have a product Warranty?
Do you have a product Warranty?
Yea we do! Its a bit dry to read though:
This Limited Warranty applies to physical goods, and only for physical goods, purchased from Grow Sensors LTD (the "Physical Goods").
What does this limited warranty cover?
This Limited Warranty covers any defects in material or workmanship under normal use during the Warranty Period.
During the Warranty Period, Grow Sensors LTD will repair or replace, at no charge, products or parts of a product that proves defective because of improper material or workmanship, under normal use and maintenance.
What will we do to correct problems?
Gros Sensors LTD will either repair the Product at no charge, using new or refurbished replacement parts or replace the product.
How long does the coverage last?
The Warranty Period for Physical Goods purchased from Grow Sensors LTD is 2 years from the date of purchase.
A replacement Physical Good or part assumes the remaining warranty of the original Physical Good or 2 years from the date of replacement or repair, whichever is longer.
What does this limited warranty not cover?
This Limited Warranty does not cover any problem that is caused by:
● conditions, malfunctions or damage not resulting from defects in material or workmanship
What do you have to do?
To obtain warranty service, you must first contact us to determine the problem and the most appropriate solution for you.
Do you link up to Home Assistant?
Do you link up to Home Assistant?
Yes! The Grow Sensor now integrates with Home Assistant. This means you can connect your sensor to your smart growing environment and create automations or monitor conditions alongside other devices. We’re strong advocates for an open ecosystem and committed to supporting broad compatibility with third-party products and platforms.
The Grow Sensor PRO is the missing piece for your Home Assistant grow-room. Learn how to integrate it: Build a home assistant grow room with theGrow Sensor PRO.
Can I pay with cypto currency?
Can I pay with cypto currency?
Yup you sure can! Just select this payment option at checkout.
How secure is my data?
How secure is my data?
Your data is encrypted and securely stored. We never share or sell your information, and you have full control over your grow data.
