Air+ & Air Pro+ – Wireless Greenhouse Air Sensor

Measure CO₂, Temperature, Humidity and PAR Where Your Crop Grows

The ventilated, solar-powered air sensor that measures CO₂, air temperature, humidity and PAR right between the plants. Air Pro+ adds CO₂ at ±30 ppm, fully wireless. You place it in the crop, so it measures the air your plants actually grow in.

Get the Specs Request Pricing

No Installation Costs
CO₂ Readings Between the Plants
Per-Zone Climate Data

One Box Reads the Aisle.
Air+ Reads the Whole House.

The Uniformity Reality

One Box, One Blind Spot

Most greenhouses steer climate and CO₂ dosing on a single measuring box near the climate computer. However, CO₂ and temperature are not uniform across the greenhouse. As a result, relying on one central reading leads to:

So the gaps show up in three ways:

Wasted CO₂

Dosed CO₂ that never reaches the far end of the crop.

Hidden Humidity

Pockets of wet air under the screen the central box never sees.

Greenhouse Top-Down View

Red Zone (Crop) Green Zone (Aisle) Heat/Humidity Trapped

A single measuring box misses local CO₂, heat and humidity

Calibrated Air Data. Zero Cables.

Calibrated air monitoring at ±0.3 °C and ±30 ppm CO₂, every 5 minutes, without the infrastructure complexity

Ventilated Shield

Active ventilation ensures the sensor reads the true air the plants experience. Sun cannot inflate the temperature reading.

Ventilated radiation shield – accurate greenhouse air temperature measurement

CO₂, Temp, Humidity & PAR

Air temperature, relative humidity, PAR and CO₂ (on Air Pro+), measured right between the plants in one wireless device.

Infrared plant sensor – CO₂, temperature, humidity and PAR measurement in greenhouse

Solar Engine

Solar-powered with a lithium-ion battery and Ti nano-harvest® technology. Always on, install anywhere in minutes.

Solar-powered engine – Air+ sensor runs autonomously without cables in greenhouse

No Cables. No Electrician. No Delays.

Deploy your air sensors in minutes, not days. Solar power and LoRa Private connectivity mean zero installation complexity.

Find Your CO₂ and Humidity Blind Spots

CO₂ and humidity vary across the greenhouse. Continuous air monitoring between the plants shows where dosed CO₂ falls short and where humidity builds up, so you can act before it costs yield.

The Gap: Central Box vs Plant Level

Before Air+

CO₂ dosing wasted on the wrong zones
Humidity problems found too late
No visibility into CO₂ distribution
Guessing where the air is right

With Air+

See where dosed CO₂ actually arrives
Spot humidity build-up under the screen
Real-time CO₂, temp and humidity per zone
Data fed straight to your climate computer

See the Full Grid

Map CO₂, temperature and humidity across your entire facility

Don’t Just Monitor One Spot

Deploy a grid of Air+ and Air Pro+ sensors to visualize CO₂, temperature and humidity distribution across your entire facility.

Identify CO₂ & Heat Zones

Spot uneven CO₂ and heat instantly with color-coded maps

Optimize Climate Control

Fine-tune dosing and ventilation based on real distribution data

Scalable Coverage

Add sensors as needed with zero infrastructure changes

Temperature Scale

Greenhouse temperature CO₂ and temperature heatmap – Air+ grid visualization

Sigrow Dashboard

Live

610 ppm

Min CO₂

845 ppm

Avg CO₂

1020 ppm

Max CO₂

Real-time visualization of 64 Air+ sensors

Works With Your Existing Systems

Seamless integration with leading climate control platforms

Compatible Climate Computers

Priva

Feeds data directly via API

Hoogendoorn

Pushes readings straight into your strategy

Ridder

Syncs in real time through the API

Technical Specifications

LoRa Connectivity

500 m range

Air Temperature

±0.3 °C accuracy

CO₂ on Air Pro+

±30 ppm accuracy

Power Source:
Solar with lithium-ion battery, 3+ year life
Measurements:
Air temp, RH, PAR, CO₂ (Air Pro+)
Housing:
Actively ventilated, IP64 enclosure
Data Output:
Every 5 minutes, visible in the Sigrow app or through seamless integration with your climate computer

How Air+ compares to other greenhouse air sensors

Air Pro+ is the only ventilated, solar-powered wireless greenhouse sensor that combines CO₂, air temperature, relative humidity and PAR light in a single device. Each unit measures CO₂ at ±30 ppm and air temperature at ±0.3 °C, runs on solar power with a 3+ year battery, and integrates with Priva, Hoogendoorn and Ridder via the Sigrow API.

Frequently Asked Questions

Both units share the same ventilated, solar-powered hardware and measure air temperature, relative humidity and PAR light at plant level. The difference is CO₂: Air Pro+ adds a CO₂ sensor accurate to ±30 ppm, while the standard Air+ does not. Choose Air Pro+ if you dose CO₂ or want to check CO₂ between the plants, and choose Air+ where temperature, humidity and light are enough.

Most greenhouse crops grow best at a CO₂ level between 800 and 1,200 ppm, well above the 400 ppm of outside air. Tomatoes, cucumbers and peppers respond strongly to CO₂ enrichment in this range. Above roughly 1,500 ppm the extra gain levels off and dosing simply costs money. Air Pro+ measures CO₂ at plant level to ±30 ppm, so you can see whether your dosing actually reaches the crop and hold the concentration where it pays off.

Place a CO₂ sensor between the plants, at crop height, in a spot that represents most of the greenhouse. Avoid the aisle, avoid the gable ends, and keep it away from the CO₂ injection point, where readings run artificially high. Because CO₂ is uneven across a greenhouse, one box near the climate computer rarely reflects the crop. Air+ and Air Pro+ are wireless and solar-powered, so you can hang several between the plants in minutes, with no cables and no electrician.

Yes. Air+ and Air Pro+ integrate with Priva, Hoogendoorn and Ridder through the Sigrow API, so your CO₂, temperature, humidity and PAR readings flow straight into the climate computer you already use. You can also follow the live data in the Sigrow app. There is no need to replace your existing system.

It depends on the size of your greenhouse and how uniform your climate is. Growers usually start with a grid of sensors to map CO₂, temperature, humidity and PAR across the greenhouse, then add more around problem areas such as gable ends and screen gaps. One Sigrow Central station supports up to 150 devices, so the system scales from a single compartment to a whole site.

Ready to reveal the power of your climate data?

Join leading growers who are preventing disease and optimizing yields with Sigrow’s air-side intelligence.

We’re here to support you.

Questions, assistance, or just want to chat – reach out!

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Sigrow greenhouse monitoring camera and sensor technology