GrowFlux Blog

Meet GrowFlux at the Resilient Harvests Conference in Palm Beach

Posted by Eric Eisele on

GrowFlux CEO Eric Eisele will be leading the panel discussion at Resilient Harvests 2022 in Palm Beach November 1-2. The Resilient Harvests Conference brings together multidisciplinary leaders interested in a resource-efficient future for controlled environment agriculture (CEA) to build consensus on government regulations, utility and efficiency program support, and technology integration.


GrowFlux CEO Eric Eisele will be leading the panel discussion "Best Practices in Automation & Controls

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Introducing the Pro Access Point

Posted by Eric Eisele on

We're excited to introduce the Pro Access Point in a fully waterproof enclosure. Since introducing our low cost Access Point a few years ago, we have received frequent requests from growers to offer a waterproof version that can be installed in growing spaces.

The Pro Access Point has expanded capabilities and allows growers to connect more devices - up to 500 - to scale to the largest of farms. Growers can add additional Access Points as necessary to scale even further, including to multiple facilities.

We designed the new Pro Access Point with a rugged IP66 enclosure with IP67 connectors, tough UV resistant ASA resin, and multiple mounting options to secure your equipment. The Pro Access Point performs in greenhouse environments, indoor farms, and the outdoors. The sealed enclosure includes a waterproof pressure equalization vent that prohibits the ingress of liquid water while allowing internal pressure to equalize among changes in atmospheric pressure, thereby protecting the seals from undue and further preventing ingress.


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Our collaboration with NREL

Posted by Eric Eisele on

GrowFlux was recently chosen to be part of Wells Fargo's IN2 Innovation Incubator. As part of this program, Wells Fargo has provided $250k in research funding for GrowFlux to partner with NREL (National Renewable Energy Laboratory) and the Donald Danforth Plant Science Center.

GrowFlux's working objectives with NREL and the Danforth Center are to benchmark the energy savings with GrowFlux's greenhouse lighting controls technology. GrowFlux plans to launch turnkey light sensor based control for greenhouses that are compatible with all GrowFlux Mesh lighting controllers as well as GrowFlux Mesh enabled lights. The control algorithm uses Apogee Instruments PAR sensors to precisely control light levels in response to the real time sunlight availability.

GrowFlux and NREL are currently building machine learning algorithms to optimize lighting strategies for a range of climate conditions, lighting products, and Daily Light Integral (DLI) objectives. Follow our blog for more updates as our work develops. 

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The Far-Red Growers Guide

Posted by Eric Eisele on

What is Far Red light?

Far-red light (> 700 nm wavelength) is at the very edge of the photosynthetically active radiation (PAR) and visible spectrum, and falls outside the PAR range of 400-700nm.

Different wavelengths of light have different photosynthetic efficiency, peaking in the red and blue regions. Although photosynthetic efficiency falls sharply for wavelengths longer than 685 nm, far-red light enhances the photosynthetic efficiency of shorter wavelength light.

Delivering far-red light to the crop at certain times allows growers to manipulate plant responses, flower faster, and boost yield. GrowFlux’s platform is built to help growers leverage far-red and intelligent lighting control.


    Far-red light, delivered only at specific times of the day, acts on photoreceptors in short day flowering plants, accelerating flowering and ultimately reducing time to harvest. GrowFlux’s customers are often growing strawberries 15% faster using our tunable far-red Light Formulas

    A small absolute quantity of far-red light delivered during the day can boost the crop’s ability to metabolize with PAR spectrum light in the 400-700nm range. We typically see about a 10-15% increase in yield between light formulas with and without far-red light.

    Fine tuning the ratio of red to far-red light allows growers to induce shade avoidance responses in the crop, which can be used to boost leaf area and radiation capture in the earliest stages of growth. GrowFlux offers light formulas and tunable controls to fully leverage this effect.


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What to look for in a wireless CO2 sensor

Posted by GrowFlux on


CO2 monitoring is all but necessary for indoor farmers and greenhouse cultivators looking to optimize yield, time to harvest, and energy consumption, however carbon dioxide concentration is difficult to measure in practice. Most CO2 detection techniques are difficult to optimize for battery life, and sensor equipment often uses fans and non-waterproof enclosures to let air into the sensing elements. Further, calibration procedures must be followed for accurate CO2 sensing. For these reasons and others, most CO2 sensors require wired installation, limiting their use in a greenhouse or indoor farm.

GrowFlux’s CO2 Microclimate Sensor was born out of the frustrations of many growers and farmers who have tried and failed to use CO2 sensors originally designed for applications outside of agriculture. GrowFlux’s CO2 Microclimate Sensor brings several new features we developed based on our experience working with indoor growers, including cloud connectivity and cloud based datalogging, a splash resistant enclosure that lets gases into the detector while maintaining a 5 minute response time, and wire free installation with high reliability GrowFlux Mesh wireless connectivity. These key features allow growers to place the sensors anywhere among the plant canopy, zeroing in on the microclimate variations that are affecting their crops.

Detection technique

There are two basic types of carbon dioxide sensing techniques, and not all detection techniques are equal.

Capacitive sensing - also known as CMOS gas sensing - this technique uses a small semiconductor chip inside the sensor that is coated in a specialized coating and layered with a micro heating plate. This low cost sensor detects gases such as CO2, carbon monoxide, alcohols, volatile organic compounds (VOCs), and other gases by measuring the change in capacitance of the coating on the chip as it absorbs these gases. This type of sensor responds primarily to VOCs as well as hundreds of other compounds in the air, and is generally not well suited for horticultural use.

Non-dispersive infrared (NDIR) - this technique uses an infrared light source and an infrared detector to measure CO2 in the air; the optics and precision of these devices are highly engineered to only measure CO2 - NDIR detectors do not respond to other gases and VOCs in the air.

Not only does GrowFlux’s CO2 Microclimate Sensor use NDIR detection, it also compensates the measurement for atmospheric pressure and relative using a separate pressure sensor, giving optimal accuracy in varying conditions.

Wireless reliability

Wireless CO2 sensors can be placed closer to crops and across large areas. Wireless CO2 sensors can also be re-positioned easily to develop a better understanding of microclimates in your cultivation space. The wireless technology within the sensor can affect monitoring practices.

Response time

CO2 sensors typically use a permeable housing to protect sensitive detector elements from dust. The design of these protective housings greatly affects how fast air permeates into the detector, and in turn how fast a carbon dioxide sensor responds to changes in CO2 concentration in the air. Some sensors on the market can take up to an hour to stabilize to an accurate reading.

For horticulture applications using carbon dioxide supplementation, relatively fast response times are necessary to capture surges in CO2 concentration

Battery Life

Engineering NDIR CO2 detectors for long battery life is a complex challenge; up until 2020, very few battery powered CO2 sensors even existed.


Sending the data directly to the cloud in real time unlocks the full potential of the data; cloud based data logging makes the sensor data visible in real time, opening up integrations with other applications and systems. In our experience, logging devices which store sensor data locally lead to poor data collection practices - personnel lose data, get lazy and stop consistently gathering data, and often don’t budget the time to manage the data with spreadsheets.

As with any cloud connected sensor, be sure to select a sensor that allows for raw data download and integration with other systems with a software API.


All CO2 sensors drift in accuracy slowly over time. Look for a sensor with a robust and easy to perform calibration procedure. We have even seen some sensors marketed for horticulture use that entirely lack calibration methods. Some CO2 sensors on the market are built first for indoor air quality sensing in buildings, where the CO2 concentration typically drops to outdoor ambient levels at some point each 24 hours - these sensors often use autocalibration techniques based on this diurnal rhythm. Such autocalibration methods will lead to inaccurate data when used in horticulture.

GrowFlux’s CO2 Microclimate Sensor can be calibrated outdoors in minutes without any specialized equipment.

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