--- title: "Greenhouse Climate Monitoring Sensors in the UAE | Listonics" description: "Which greenhouse sensors matter in the UAE, where to mount them, how many you need, how to calibrate them and how to make sure night alerts reach someone." canonical: "https://listonics.com/blog/greenhouse-climate-monitoring-sensors-uae/" source: listonics.com --- Nov 06, 2026 · 10 min read · By [Srinivasan Ramachandran](https://listonics.com/about/#author) # Greenhouse climate monitoring in the UAE: which sensors you need and where they go Temperature, humidity, CO2, light and root-zone moisture: what to measure in a UAE greenhouse, and where each sensor actually belongs. Quick answer A UAE greenhouse needs five measurements: air temperature, humidity (from which VPD is calculated), CO2, light as PAR, and root-zone moisture. Mount air sensors at crop height in shaded, ventilated shields, away from pads, fans and doors. Use more than one per zone, check them against a reference regularly, log everything, and make sure night alerts reach a named person. Key takeaways - Five readings cover most greenhouses: temperature, humidity and VPD, CO2, PAR light and substrate moisture. - Placement matters more than the sensor brand: crop height, shaded and ventilated, away from pads, fans and doors. - One sensor per house is a guess; two or more per zone shows you the gradient and catches a failed unit. - Calibration drifts in heat and dust, so schedule checks against a reference instrument. - The grower or agronomist sets the targets; the monitoring system's job is reliable readings and alerts that reach a person at 3am. ## What should a UAE greenhouse actually measure? Five things: air temperature, relative humidity, carbon dioxide, light, and moisture in the root zone. Together they describe the conditions the crop is living in, and each one changes quickly in a Gulf summer once cooling pads, fans or shade screens misbehave. Most other measurements are useful extras rather than the core. Temperature and humidity are measured together because the crop responds to both at once. A dashboard can combine them into vapour pressure deficit (VPD), a single figure many growers use to judge whether the air is pulling water from leaves too hard or too little. CO2 matters most in houses that are closed up for cooling, where levels can fall during the day as plants use it. Light is best measured as PAR, the part of sunlight plants use, rather than lux, which is designed around the human eye. Root-zone moisture, in soil or in substrate such as cocopeat or rockwool slabs, tells you whether irrigation is keeping up. What the right numbers are is not our call. The grower or their agronomist sets the targets for each crop and stage. Our job, as the IT and [IoT side of the project](https://listonics.com/services/iot/), is to make sure the readings are trustworthy and that someone hears about it when they leave the range. ## Where should greenhouse sensors be placed? At crop height, in the middle of the growing area, inside a shaded and ventilated radiation shield. A sensor in direct sun reads several degrees hotter than the air around the plants, and one bolted to a wall or post reads the structure rather than the canopy. Raise it as the crop grows, or mount it on an adjustable hanger so that is easy. - Keep air sensors well away from evaporative cooling pads, which make the air beside them cooler and wetter than the rest of the house. - Keep them out of the direct stream of exhaust and circulation fans, and away from doors that open to the outside heat. - Do not mount them above heaters, misting nozzles or irrigation lines that spray. - Put CO2 sensors at crop height too, and away from where people stand and breathe during work. - Point PAR sensors straight up, level, above the canopy, where no beam or screen casts a fixed shadow on them. - Place substrate moisture probes in representative slabs or beds, not in the wettest spot next to a dripper or the driest at the end of a line. A useful habit is to photograph every sensor in position and record its location on a simple plan. When a reading looks odd six months later, the first question is always where exactly that sensor is, and the answer should not depend on someone's memory. ## How many sensors does a greenhouse need? More than one per house, and enough to show the difference between the cool end by the pads and the hot end by the fans. In a pad-and-fan greenhouse the air warms as it travels, so a single sensor in the middle hides the conditions the plants at either end are actually in. A common starting point is a sensor near each end and one in the centre of each climate zone, then more if the readings show bigger differences than expected. A second reason to have more than one is that sensors fail. If one unit starts reading strangely, a neighbour a few metres away tells you whether the greenhouse changed or the sensor did. That cross-check is worth a lot at night, when nobody is there to look. Outside conditions are worth one weather station per site, because the outside temperature, humidity, wind and sun explain much of what happens inside. For regional forecasts and dust and weather warnings, the [UAE National Center of Meteorology](https://www.ncm.gov.ae/) is the official source, and it is worth having someone check it before a storm or a heat spell rather than relying on the station alone. ## How do heat and dust affect greenhouse sensors? They shorten sensor life and push readings off over time. Humidity sensors in particular drift after long periods at high temperature and high humidity, and fine dust settles on shields, filters and PAR sensor domes, where it blocks airflow or light. A sensor that reads well in its first winter can be noticeably off by the end of its first summer. Practical measures help. Choose shields and enclosures rated for outdoor use and direct sun, with the electronics shaded rather than in a sealed box that cooks. Wipe PAR sensor domes as part of routine cleaning. Run cables in conduit where workers and machines move, and protect connections at the gateway from heat and water. Where the greenhouse is on a remote farm in Liwa, Al Ain or the Dubai outskirts, plan for power cuts too: a small battery backup on the gateway and network equipment keeps the readings flowing when the mains drops. ## How often should greenhouse sensors be calibrated? Check them against a trusted reference on a fixed schedule, and more often in summer. The simplest routine is a calibrated handheld instrument that someone carries round each sensor, compares readings, and writes down the difference. When a sensor is consistently out by more than the grower is comfortable with, it is adjusted, cleaned or replaced. CO2 sensors usually have their own calibration method set by the manufacturer, and some assume they see outdoor-level air regularly, which is not true in a closed house. Follow the maker's instructions rather than assuming. Substrate moisture probes are often calibrated for a particular growing medium, so set them up for the substrate actually in use. Keep a log of every check. Over time it tells you which sensors drift, which locations are harsh, and when to budget for replacements. ## What should happen when a reading goes out of range at night? Someone named should be told, quickly, and someone else should be told if the first person does not respond. Cooling failures, a stuck vent or a tripped fan often happen when the farm is quiet, and a few hours of heat can be enough to damage a crop. An alert that lands in an email inbox until morning is a log entry, not an alarm. A good alert path sends the first message to the person on duty, by a phone notification or a WhatsApp or SMS message, then escalates to a supervisor or the farm manager if nobody acknowledges it within a set time. It should also alert on silence: if a sensor or gateway stops reporting, that is its own alarm, because it might mean power or connectivity has gone, and those failures often come together with the climate problem. Set two thresholds rather than one where it helps: a warning level that gets attention and an urgent level that wakes people up. The grower decides where those levels sit. We make sure the alerts actually arrive. ## What network do greenhouse sensors need? It depends on distance and how many houses there are. A single greenhouse near the farm office can often run on Wi-Fi or wired connections. A site with several houses spread across a farm usually suits a low-power radio network such as LoRaWAN, where battery sensors report to a gateway that can be a long way off. The [LoRa Alliance](https://www.lora-alliance.org/) publishes the LoRaWAN standard and lists smart agriculture among the markets it serves. We compare the options in [LoRaWAN vs Wi-Fi sensors](https://listonics.com/blog/lorawan-vs-wifi-sensors-dubai/). Whatever the radio, the data has to leave the farm, and many farms have weak or no fixed broadband. A cellular router or satellite link at the gateway solves that, with a battery to ride through outages. Our [smart farm IoT page](https://listonics.com/smart-farm-iot-uae/) covers how the whole site fits together. If the monitoring is a commercial IoT service run by a provider, it may need registering with the regulator. [TDRA runs a registration service for IoT services](https://tdra.gov.ae/en/Services/internet-of-things-services-registration), and we handle that paperwork as part of a project where it applies. ## What should be logged, and for how long? Every reading, at a steady interval, kept for at least a full growing year and ideally longer. Logged data lets the grower compare this season with last, see how the house behaved during a heat spell, and show buyers or auditors how produce was grown. It also settles arguments about whether a fan really failed at 2am. Store the data somewhere the farm owns and can export, not only inside a vendor portal tied to one device brand. A simple dashboard that shows each zone at a glance, with the history a click away, gets used. A complicated one gets ignored. The UAE's [National Food Security Strategy 2051](https://u.ae/en/about-the-uae/strategies-initiatives-and-awards/strategies-plans-and-visions/environment-and-energy/national-food-security-strategy-2051) aims to build local food production on modern technologies, and good records are a practical part of that for any farm. ## Frequently asked questions ### Do I need a VPD sensor for my greenhouse? There is no separate VPD sensor. VPD is calculated from air temperature and relative humidity, ideally with leaf temperature too. If your temperature and humidity sensors are accurate and well placed, the dashboard can work out VPD automatically. The grower or agronomist decides what VPD range suits the crop; the system displays it and alerts when it moves outside that range. ### Can you install climate controllers or cooling systems? No. Listonics does the IT and IoT side: sensors, gateways, network coverage, power backup for that equipment, dashboards and alerts. Climate control machinery, pads, fans and greenhouse structures come from specialist suppliers. Where an existing climate controller exposes its data, we can read it into the same dashboard so the farm has one view. ### Why does my greenhouse sensor read hotter than the thermometer? Usually because of where it is. A sensor in direct sun, without a shaded and ventilated shield, or mounted against a wall or post, reads the heat of the sun and the structure rather than the air. Move it to crop height inside a proper radiation shield, compare it with a calibrated handheld instrument, and the gap usually closes. ### How many sensors does a pad-and-fan greenhouse need? At least one near the pad end, one in the middle and one near the fan end of each zone, because the air warms as it crosses the house. More are useful in long houses or where readings show large differences. Two sensors near each other also let you spot a failed unit, which matters for alerts at night. ### Do greenhouse sensors work in UAE summer heat and dust? They work, but they age faster. Humidity sensors can drift after long periods of heat and humidity, and dust settles on shields and light sensors. Choose equipment rated for outdoor use and direct sun, clean it as part of routine maintenance, and check readings against a reference instrument more often in summer. ### How do night alerts reach the right person? By sending the first alert to a named person on duty, by phone notification, SMS or WhatsApp, and escalating to a second person if nobody acknowledges it in a set time. The system should also alert when a sensor or gateway stops reporting, because silence often means a power or connection failure at the same time as a climate problem. Related service IoT & Connected Devices Cameras, access control, sensors and gateways installed on a network built for them, with the dashboards, integrations and firmware work handled by the same team. [See the service](https://listonics.com/services/iot/) Written by [Srinivasan Ramachandran](https://listonics.com/about/#author), Founder, Listonics · Published Nov 06, 2026 · Last reviewed November 6, 2026 · 1901 words ## Read next Related guides from the same part of office IT. [All guides](https://listonics.com/blog/) [Hydroponic and vertical farm monitoring: pH, EC, water temperature and alerts](https://listonics.com/blog/hydroponic-vertical-farm-monitoring-uae/) (Agritech): pH and EC probes drift, pumps stop and power drops. How to monitor a hydroponic farm so the right person hears about it in time. [Smart irrigation controllers vs timers: what actually changes on a UAE farm](https://listonics.com/blog/smart-irrigation-controllers-vs-timers-uae/) (Agritech): A timer waters on schedule whatever the weather. What soil sensors, flow meters and weather data change on a UAE farm, and what they do not. [Choosing between Wi-Fi, LoRaWAN and Thread for an office sensor project](https://listonics.com/blog/lorawan-vs-wifi-sensors-dubai/) (Devices): The radio choice is made by the building and the battery life you need, not by which standard sounds most modern. ## Talk to an engineer about IoT & connected devices for your office. [Contact us](https://listonics.com/contact/) This page is general information for Dubai businesses, not a substitute for a professional assessment of your own setup. For advice specific to your office, [book a free assessment](https://listonics.com/contact/).