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Image 2: Temperature display provides quick view of sensor data

10 Questions To Ask Before Installing a Remote Monitoring System

By Rob Fusco
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Image 2: Temperature display provides quick view of sensor data

No matter the size of your cannabis greenhouse operation, keeping your plants alive and healthy requires the best possible growing environment. This means greenhouse managers and personnel must frequently monitor the status of environmental conditions and equipment. The sooner someone discovers extreme temperature fluctuations, rising humidity or equipment failure, the more inventory you can save.

Image 1: Cloud-based remote monitoring system in protective enclosure
Cloud-based remote monitoring system in protective enclosure

That’s why integrating a remote monitoring system into your greenhouse operation can save you time, money and anxiety. Monitoring systems that use cloud-based technology let you see real-time status of all monitored conditions and receive alerts right on your mobile device.

Installing a monitoring system and sensors can be easier than you might think. Here are answers to ten questions to ask before installing a cloud-based monitoring system:

  1. What is required to use a remote monitoring system?

Most remote monitoring systems require an internet or WiFi connection and access to an electrical outlet. Programming is done through a website, so it’s easiest to use a computer for the initial setup. If you don’t have an internet connection at your location, you’ll want to choose a cellular system. Make sure that there’s sufficient signal strength at your site, and check the signal quality in the area before purchasing a cellular device.

2. How do we determine what kind of monitoring system and sensors we need?

A reputable manufacturer will have a well-trained support team that can assess your needs even without a site visit to determine which products are best for your application. If you feel you need them to check out your greenhouse operation,many companies can set up a video conference or FaceTime chat to substitute for being on site.

You will want to provide details about the scope and purpose of your cannabis growing operation. Important factors to discuss include:

  • Skeletal structure of the greenhouse (metal, plastic, wood, etc.) and the covering material (glass or plastic).
  • Floor space square footage and height of each of your greenhouses.
  • Number of greenhouse structures in your operation.
  • Outdoor climate to determine if you rely more on heating or air conditioning and the level of humidity control needed.
  • Space dedicated to phases of growth (cloning and propagation, vegetative, flowering) and the microclimates needed for each.
  • Types of lighting, ventilation and irrigation systems.
  • Level of technological automation versus manual operation in place.

The monitoring system representative will then determine the type of system that would best serve your operation, the number of base units you will need and the types of sensors required.

Image 2: Temperature display provides quick view of sensor data
Temperature display provides quick view of sensor data

The representative should also be able to provide tips on the placement of the sensors you’re purchasing. For example, to ensure thorough air temperature coverage, place sensors throughout the greenhouse, next to the thermostat controlling the room temperature and in the center of the greenhouse out of direct sunlight.

Note that there shouldn’t be a cost for a demo, consultation or assistance throughout the sales process. Be sure to ask if there are any fees or licenses to keep using the monitoring equipment after you purchase it.

3. Are sensors included with the monitoring system?

In most cases, sensors are sold separately. The sensors you select depend upon the conditions you want to monitor and how many you can connect to your base unit. Certainly, temperature is critical, but there are many other factors to deal with as well, such as humidity, CO2, soil moisture, water pH, power and equipment failure, ventilation and physical security.

For example, humidity has a direct impact on the photosynthesis and transpiration of plants. High humidity can also cause disease and promote the growth of harmful mold, algae and mildew. Sensors can detect changes in humidity levels.

Image 3: Water pH sensor
Water pH sensor

Like any other plant, cannabis needs CO2 to thrive, so it’s a good idea to include a CO2 sensor that will signal to the monitoring device when readings go out of the preset range. There are even sensors that you can place in the soil to measure moisture content to help prevent over- or underwatering, budget water usage costs, promote growth and increase crop yield and quality.

Of course, all the critical systems in your growing facility—from water pumps to irrigation lines to louvers—rely on electrical power. A power outage monitoring sensor detects power failure. It can also monitor equipment for conditions that predict if a problem is looming, such as power fluctuations that occur at specific times.

Ventilation systems not only help control temperature, they also provide fresh air that is critical to plant health. Automated systems include features like vented roofs, side vents and forced fans. Sensors placed on all these systems will send personnel an alert if they stop running or operate outside of preset parameters.

To monitor the physical security of your greenhouses, you can add sensors to entrance doors, windows, supply rooms and equipment sheds. During off hours, when no staff is on duty, you can remain vigilant and be alerted to any unauthorized entry into your facility.

4. Do monitoring systems only work with the manufacturer’s sensors?

Not necessarily. For example, certain monitoring units can connect with most 4-20mA sensors and transmitters regardless of the brand. When selecting sensors, you might have a choice between ones that are designed by the manufacturer to work specifically with the monitoring system or universal components made by a third party. If the components aren’t made by the system manufacturer, you’ll want to find out if they have been tested with the monitor you are choosing and if you need to work with another vendor to purchase the parts.

A humidity sensor mounted in a weatherproof enclosure
A humidity sensor mounted in a weatherproof enclosure

5. Is a monitoring system easy to set up, or do we need to hire an electrician?

Many monitoring systems are quick and easy to install, and users can often set them up without hiring an outside expert. Look for one that requires only a few simple physical installation steps. For example:

  1. Mount the device to the wall or somewhere secure;
  2. Plug it into an electrical outlet and an internet connection;
  3. Connect the sensors.

You connect the sensors to the base unit’s terminal strip using wire, which is included with many sensors. The range of many wired sensors can be extended up to 2,000 feet away from the base unit by adding wire that can be easily purchased at any home store. It’s a good idea to hire an electrician if you need to run wires through walls or ceilings.

Usually, once you plug in the device and connect the sensors, you then create an account on the manufacturer’s designated website and begin using your device. There should be no fee to create an account and use the site.

If the manufacturer doesn’t offer installation services, ask if they can recommend a local representative in your area who can set up your system. If not, make sure they provide free technical support via phone or email to walk you through the installation and answer any questions you might have about programming and daily usage.

6. Is there a monthly fee to access all the functionality of a monitoring device?

Many web- or cloud-based systems provide free functionality with some limitations. You might have to purchase a premium subscription to unlock features such as text messaging, phone call alerts and unlimited data logging access.

 7. Should we get a system that is wired or wireless? Will we need to have a phone line, cable, internet or something else?

Wireless can mean two different things as it relates to monitoring: how the system communicates its data to the outside world and how the sensors communicate with the system.

The most popular systems require an internet or WiFi connection, but if that’s not an option, cellular- and phone-based systems are available.

A hardwired monitoring system connects the sensors to the base device with wires. A wireless system uses built-in radio transmitters to communicate with the base unit. Some monitoring systems can accommodate a combination of hardwired and wireless sensors.

8. Can one system monitor several sensor inputs around the clock?

Once the monitoring system is installed and programmed, it will constantly read the information from the sensors 24/7. Cloud-based systems have data logging capabilities and store limitless amounts of information that you can view from any internet-connected device via a website or app.

If the system detects any sensor readings outside of the preset range, it will send an alarm to all designated personnel. The number of sensors a base unit can monitor varies. Make sure to evaluate your needs and to select one that can accommodate your present situation and future growth.

When a monitoring system identifies a change in status, it immediately sends alerts to people on your contact list. If you don’t want all your personnel to receive notifications at the same time, some devices can be programmed to send alerts in a tiered fashion or on a schedule. Multiple communications methods like phone, email and text provide extra assurance that you’ll get the alert. It’s a good idea to check the number of people the system can reach and if the system automatically cycles through the contact list until someone responds. Some systems allow for flexible scheduling, so that off-duty personnel don’t receive alerts.

9. Do monitoring systems have a back-up power system that will ensure the alarming function still works if the power goes out or if someone disconnects the power?

The safest choice is a cloud-based system that comes with a built-in battery backup that will last for hours in the event of a power failure. Cloud-based units constantly communicate a signal to the cloud to validate its online status. If the communication link is interrupted—for example by a power outage or an employee accidently switching off the unit—the system generates an alarm indicating that the internet connection is lost or that there is a cellular communications problem. Users are alerted about the disruption through phone, text or email. All data collected during this time will be stored in the device and will be uploaded to the cloud when the internet connection is restored.

If you opt for a cloud-based monitoring system, make sure the infrastructure used to create the cloud platform is monitored 24/7 by the manufacturer’s team. Ask if they have multiple backups across the country to ensure the system is never down.

10. What should we expect if we need technical support or repairs to the system?

Purchase your system from a reputable manufacturer that provides a warranty and offers full repair services in the event the product stops working as it should. Also, research to make sure their tech support team is knowledgeable and willing to walk you through any questions you have about your monitoring system. Often, support specialists can diagnose and correct unit setup and programming issues over the phone.

It helps to record your observations regarding the problem, so the tech team can look for trends and circumstances concerning the issue and better diagnose the problem. Ideally, the manufacturer can provide loaner units if your problem requires mailing the device to their facility for repair.

How To Select The Best Monitoring System For Your Cannabis Greenhouses

By Rob Fusco
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Maintaining an environment that supports cultivation and keeps plants healthy is not an easy task. In cannabis growing, there are a variety of factors that greenhouse managers and personnel must monitor to ensure that their plants are in a healthy environment that fosters growth and development. Temperature, humidity, lighting and CO2 levels are a few of the conditions that need to be tailored to each cannabis greenhouse operation. However, it can be difficult to constantly monitor the status of your equipment and the greenhouse environment, especially after hours or during the off-season.

A remote monitoring system that’s properly selected and installed can help greenhouse managers keep their cannabis plants healthy, multiply their yields and increase return on investment. This type of system also helps operators identify patterns and trends in environmental conditions and get insight into larger issues that can prevent problems before they arise.

Cloud-based monitoring system base unit in weatherproof enclosure

Here are some tips on key conditions to monitor and what you need to consider when selecting a monitoring system for your cannabis greenhouse operation:

Temperature

Temperature plays a crucial role in any cannabis grow operation. The climate in your greenhouse must be warm enough to nurture photosynthesis and the growth of cannabis plants. Setting the incorrect temperature will significantly impact the potential yield of the plant and the rate at which it develops. A temperature too low will slow the growth of the cannabis, but too hot can lead to heat stress for your plants. The ideal temperature for a standard greenhouse is between 70 and 80 degrees Fahrenheit. However, depending on the stage of plant and desired growth densities, the temperature of the greenhouse needs to be adjusted accordingly.

Humidity Levels

Humidity directly affects plant photosynthesis and transpiration, so controlling humidity is vital in greenhouse growing. The ideal relative humidity (RH) for cannabis growth is around 60%. A low humidity level can cause water to evaporate too quickly for photosynthesis, while a humidity level that is too high can cause poor growth and possible mold and fungal disease. Monitoring the moisture content in the air of your greenhouse will help the plants during the transpiration process, increasing absorption of nutrients and overall health of the cannabis. 

Lighting

Your cannabis may be getting an abundance of natural light during the summer months, but maintaining adequate sunlight during the winter months can be a challenge. As a solution to this, many greenhouse managers equip their facilities with additional lights to supplement natural light during off-seasons or off-hours. To achieve the best possible yield, a cannabis plant in the budding stage should receive twelve hours of light each day, while other stages could require additional lighting. For example, the growth stage could require your cannabis to be exposed to sunlight for up to eighteen hours a day.

CO2 Levels

Like any other plant, cannabis requires CO2 to breathe. Greenhouse managers must set and monitor the CO2 levels in their facility to make sure that there is an adequate amount for the plants to develop, grow and be healthy. The amount of carbon dioxide required for your cannabis depends of the size of the facility and the amount of light the plants are receiving. However, a standard grow area for cannabis can maintain a CO2 range from 1000 to 1500 parts per million (PPM). A level below that threshold can result in slower growth of the plants, while a level above would lead to unused and wasted CO2.

Soil moisture sensor

Irrigation and Soil Moisture

One way to ensure a good yield from your cannabis is to water it regularly and monitor your soil moisture. Overwatering your plants can have the same effect, if not worse, than letting the soil become too dry. Plants’ roots need oxygen to survive, unlike leaves that breathe CO2, and when the soil is waterlogged the roots can’t provide their function. The lack of oxygen interferes with the roots’ nutrient uptake and photosynthesis causing the cannabis plant to wilt. The exact moisture content of the soil depends on the size of your greenhouse, temperature and humidity. Whether you hand water or are using a drip irrigation system, being aware of your soil moisture is vital to the long-term health of your cannabis.

Air Circulation

Your greenhouse environment should mimic the ideal conditions in which cannabis plants flourish. With an indoor facility, you have the ability to control air circulation by venting hot air out and blowing fresh air in. Creating a circulation of air inside your greenhouse will increase your cannabis plant’s growth speed and yield. Additionally, an exhaust system helps control the temperature and humidity, while also preventing the invasion of mold and pests that thrive in hot, stagnant air.

Greenhouse Security

When growing something of value, like cannabis, there will always be a threat of intruders. Whether your greenhouse is in a populated area or around hungry wildlife, any intruder could be detrimental to your overall yields and profit. Remote monitoring systems can give you peace of mind and instantly alert you when there is an unwanted presence in your greenhouse.

Knowing all the possible threats to your cannabis greenhouse helps you evaluate your specific needs, and ultimately identify the proper remote monitoring system.

Selecting the Right Monitoring System

Other factors to consider when choosing a monitoring system right for your operation include:

  • Base unit and sensors
  • Wireless or hardwired sensors
  • Communications to your site (Phone, cellular, Wi-Fi, etc.)
  • Alarm notification
  • Programming and status checks
  • Data logging
  • Return on investment

Base Units and Sensors

Each condition in your greenhouse that you want to monitor requires its own input on the base unit of the monitoring system. You must match your needs with the number of inputs available. A good fit for a smaller cannabis greenhouse may be a lower-cost, non-expandable monitoring system. However, larger facilities have many monitoring points and more people to alert when there’s a problem. If your cannabis operation is poised for growth, purchasing an expandable system could add value to the initial purchase because you wouldn’t have to replace your entire system in the future.

Your monitoring system should also have an internal rechargeable battery backup to ensure continuous monitoring and alerts in the event of a power outage. It is also recommended to have each base unit in a sheltered enclosure to protect it from moisture, dirt and other hazards.

Placement of sensors is also crucial. For example, temperature sensors in your greenhouse should be placed throughout the facility. They should be next to your thermostat and in the center of your greenhouse, preferably away from direct sunlight.

Wireless or Hardwired Sensors

Remote monitoring systems offer the option to have sensors hardwired directly to the base unit or sensors wirelessly connected. A hardwired monitoring system connects the sensors to the base device with wires. Generally, trenching long distances for wires is time consuming and costly. So alternatively, a wireless system uses built-in radio transmitters to communicate with the base unit. Some monitoring systems can accommodate a combination of hardwired and wireless sensors.

Communications to Your Site

Monitoring devices that use cellular communications must be registered on a wireless network (like Verizon or AT&T) before you can send or receive messages. Because cellular devices perform all communications over a wireless network, it is important that there be sufficient signal strength at the greenhouse. It is a good idea to check the signal quality in the area before purchasing a cellular product. If the cellular network has less than desirable coverage, it is possible to install an external antenna to help increase cellular signal.

Alarm Notifications

When monitoring systems identify a change in status, they immediately send alerts to people on the contact list. If you don’t want all of your personnel to receive notifications at the same time, certain devices can be programmed to send alerts in a tiered fashion. It is important to consider the reach of the communications, so that you’ll be notified regardless of your locations. Multiple communications methods like phone, email and text provide extra assurance that you’ll get the alert. Also, note of the number of people the system can reach and if the system automatically cycles through the contact list until someone responds. Make sure the system allows for flexible scheduling so that it doesn’t send alarms to off-duty personnel.

Programming and Status Check

If you’re responsible for maintaining a commercial greenhouse facility, you want a system that will provide real-time status of all monitored conditions on demand. There are a few different ways to access your sensor readings. Options include calling to check status, viewing a web page, either on a local network or on the cloud, or accessing the information via an app on your mobile device. With a cloud-based system, the devices supervise themselves. This means if the internet or cellular connection goes down, the device will send an alarm to alert the appropriate personnel.

If you don’t select a cloud-based system, you will be limited to logging in through a local area network, which will allow you to make programming changes, access status conditions and review data logs. If internet connectivity is not available at your location, you will want to choose a cellular or phone system rather than Ethernet-based option.

Data Logging

Sample greenhouse monitoring data log

Data history is valuable in identifying patterns and trends in your cannabis greenhouse conditions. Manually monitoring and recording environmental parameters takes a significant amount of personnel time and detracts from other important workplace demands. However, many monitoring systems automatically save information, recording tens of thousands of data points, dates and times. Cloud-based logging provides an unlimited number of records for users to view, graph, print and export data trends.

Analyzing data samples may lend insight to larger issues and prevent problems before they arise. For example, if the data log shows power fluctuations occurring at a regular time, it could be indicative of a more serious problem. Or, if the data shows signs of a ventilation fan or supplementary lighting beginning to malfunction, they can be repaired or replaced before total failure occurs.

Return On Investment

When deciding how much you should pay for a remote monitoring system, tally up the entire cost, fully installed with additional peripherals and sensors and any labor fees for installation. Then consider the value of your cannabis plant inventory and greenhouse equipment. Finally, factor in the cost of downtime, should an environmental event shut down your operation for a period of time.

Final Thoughts

Choosing the right greenhouse monitoring system and sensors could mean the difference between life and death for your cannabis plants. Understanding the conditions you need to watch and monitoring systems’ capabilities are they best way to protect your investment.

 

Preventing Yeast and Mold with Two-Way Humidity Control

By Aaron G. Biros
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When a grower harvests their cannabis plants, they process it by drying, curing and trimming the plant material. Dried cannabis ready for the consumer can often sit on retail shelves for months before it is purchased. According to the Cannabis Safety Institute, trimming is the processing stage with the highest level of human handling, and thus presents the most significant opportunities for microbiological contamination.

The Cannabis Safety Institute recommends workers handling dry cannabis wash their hands periodically, generally conform to food safety rules and wear gloves at all times. In addition to these tips, looking at relative humidity is a good tool to mitigate contamination concerns like the growth of yeast and mold spores. Mold spores can grow quickly when there is enough moisture, but if the cannabis is dry enough, mold spores cannot develop.

Growers controlling the relative humidity of their finished product in the past often placed an orange peel or a wet cotton ball in a jar with dried cannabis to retain the weight from water and keep it from over-drying. Those tactics have since been improved upon using modern technology.

Water activity is a measure of the relative humidity immediately adjacent to the product, according to Bob Esse, vice president of research at Boveda. “Cannabis’ relative humidity will reach equilibrium with the surrounding environment over time, which is why it is so critical to manage this adjacent atmosphere,” says Esse. “Moisture content is the total water present in the product and is a variable that changes in its relationship to water activity from one strain or type of product to the next.”

Back in 1997, Boveda first patented two-way humidity control. For the last 20 years, that company has made humidity control products for packaging in a variety of industries, like wooden musical instruments, pharmaceuticals, medical devices, electronics, tobacco, photos and documents and perhaps most notably for keeping cigars at the right humidity level in a humidor. According to Charles Rutherford, business development director at Boveda, he saw people buying their products meant for cigars, but using them with cannabis. About six years ago, they started developing a product specifically for the cannabis market.

The science behind it is relatively simple, says Rutherford. “Certain salts saturated in water can naturally regulate humidity- we just developed a cannabis-specific humidity level and patented the packaging around it that purifies the water and can come in direct contact with cannabis,” says Rutherford. “Using water activity meters and a moisture isotherm test, we determined the most appropriate range of humidity levels that cannabis will remain stable.” That range turned out to be between 59% and 63% humidity level for the properties in dried cannabis to stay the same.

According to Rutherford, it is a little more complex than just a range to stay in. “There are different humidity levels that certain strains prefer, but there are personal preferences, regions and other factors to consider when determining the levels of humidity ideal for cannabis,” says Rutherford. “We wanted to understand what people consider to be perfect.” In their research they found that depending on the region of the country, that humidity level varies considerably. “Using a water activity meter we could tell exactly what people prefer,” says Rutherford. Colorado, for example, prefers significantly drier cannabis than the Pacific Northwest, according to their findings.

Right now, Boveda has two-way humidity controllers set at 62%, 58% and soon they will have an under 50% option (appealing to the Colorado market). Using a device to accurately control the humidity level in cannabis can help growers and retailers prevent contamination from the biggest source of concern: water. “There is a ton of talk about pesticide contamination, but the reality is even if the flower is grown organically, you can still encounter safety problems when the moisture level is off,” says Rutherford. From a medical perspective, keeping dried cannabis at an ideal humidity level helps stabilize the properties of it, maintaining the medical efficacy. “If this is something people use for a medicine, it should be at an ideal condition,” says Rutherford. “Quantifying and understanding what humidity level is right is what we are helping accomplish.” For patients with compromised immune systems that need safe, consumable cannabis, a humidity control device can help prevent contamination and ensure a certain degree of safety in their medicine.

On a retail level, the packaging insert can extend the shelf life of products and maintain the quality. “The world has known for decades that 70% humidity level for cigars is ideal,” says Rutherford. “The cannabis world hasn’t had a moisture standard or understanding of what is proper until very recently.” That 62% humidity level determined after commissioned testing is a good standard to reference when determining your own ideal humidity level.

Growers also recognize the value in keeping their cannabis at the right humidity level beyond the obvious safety concerns. “As cannabis dries out and loses its humidity, the overall weight is reduced,” says Rutherford. “Precision humidity control gives a uniform humidity throughout the flower, leaving out the mystery for growers and maintaining weight, meeting the nexus between quality and weight.” According to Rutherford, growers have an incentive to package their cannabis a little on the wet side. “Because it weighs the most when wet, it is sold by weight and it will lose moisture over time, the incentive to deliver product that will dry out over time- that can create a lot of problems by having high moisture content.” For the first time ever, people can dramatically extend the shelf life of dried cannabis, instead of letting products naturally deteriorate and go bad over time. “For the first time ever, it allows you to extend the shelf life of dried cannabis for aging cannabis like wine and cigars,” says Rutherford.

The data from that Cannabis Safety Institute report, collected by AquaLab and CannaSafe Analytics using a vapor sorption analyzer, shows a cutoff of 65% relative humidity. These findings give the industry a lot of guidance in working to reduce the amount of yeast and mold contamination, says Bob Esse. “If your dried cannabis is above 65% relative humidity and you are a retailer, you should send that product back to the grower because it wasn’t dried properly, is vulnerable to mold and yeast spores and thus not safe for the consumer,” says Esse.

Pointing to the report, Esse says foods with high moisture content are able to support robust microbial population growth, which can lead to bacterial and fungal infections. “Water activity is what impacts whether microorganisms can grow or not.” By using two-way humidity control technology, growers and retailers can mitigate risks of contamination, improve quality and extend the shelf life of their products.