A Buyer’s Guide to Environmental Sensors for Agricultural Use

Beyond weather and soil moisture, a growing number of farms are adding sensors that monitor the broader environment around their operations: noise, dust and air quality, temperature and humidity in storage or greenhouse spaces, and UV or solar radiation. Each solves a different problem, from compliance and neighbour relations to product quality and worker safety, and understanding what each one actually measures makes it easier to prioritise which to add first.

Noise monitors

Noise monitors track sound levels around a property over time, which matters most for operations near residential boundaries or subject to council noise limits. Continuous logging builds a defensible record for compliance purposes and can flag unusual spikes, such as equipment running outside approved hours, before they become a complaint. See our full guide on how to choose a noise monitor for more detail on placement and thresholds.

Dust and air quality sensors

Dust sensors typically measure PM10 and PM2.5 particulate levels, which come from harvest activity, unsealed roads, grain handling and livestock yards. Beyond regulatory reporting, correlating dust readings with wind direction and speed helps identify which activities or conditions are actually driving elevated levels, so operations can be adjusted before dust becomes a neighbour complaint or a compliance issue. Read our dust monitoring guide for agricultural operations for a deeper look at PM10 thresholds and placement.

Temperature and humidity sensors

In grain storage, temperature and humidity sensors placed through the grain mass give early warning of hot spots caused by moisture migration or pest activity, well before visible spoilage occurs. In greenhouses, the same sensor types support climate control decisions, tracking conditions across multiple zones so growers can respond to variation rather than relying on a single point reading near the door.

UV and solar radiation sensors

UV and solar radiation sensors measure the intensity of sunlight reaching crops or workers, which feeds into decisions on shade cloth timing, crop stress modelling and worker safety scheduling during high-UV periods. They’re less commonly deployed than weather or soil sensors, but valuable for horticultural operations growing sensitive crops or for properties with significant outdoor labour exposure.

Matching sensors to the operation

Most farms don’t need every environmental sensor type at once. Noise and dust monitoring tend to matter most for operations close to residential areas or under specific compliance obligations, while temperature and humidity sensors are most valuable wherever grain, produce or greenhouse crops are stored or grown. UV monitoring is more of a specialty addition for horticultural operations. Starting with whichever risk is most active on a given property, and adding sensor types as new needs arise, tends to work better than trying to instrument everything at once.

The bottom line

Environmental sensors extend a farm’s monitoring beyond weather and soil into the areas that affect compliance, product quality and worker safety. Noise and dust monitors tend to matter most where operations sit close to residential boundaries, while temperature and humidity sensors protect stored grain and greenhouse crops. Explore OCM’s environment and noise monitoring systems to see how these sensors integrate with weather and soil data on one platform.

Frequently Asked Questions:

Do I need a noise monitor if I’m not near neighbours?

Not necessarily. Noise monitoring is most valuable where a property sits close to residential areas, has council-imposed noise limits, or runs equipment during hours that could draw complaints. Isolated properties with no nearby neighbours generally have less need for continuous noise logging, though it can still help with equipment diagnostics in some cases.

How accurate do PM10 dust sensors need to be for compliance reporting?

Requirements vary by jurisdiction and permit conditions, so it’s worth checking the specific thresholds that apply to a given site rather than assuming a standard figure. Sensor accuracy, calibration frequency and placement all affect whether readings hold up as a defensible record, so it’s worth confirming a device meets the reporting standard required before relying on it for compliance purposes.

Can one sensor monitor both temperature and humidity in a grain silo?

Yes, combined temperature and humidity sensors are standard for grain storage, and most systems use a cable of sensors run through the grain mass to capture readings at multiple depths rather than a single point. This matters because temperature and moisture gradients within a silo can vary significantly from the surface to the core, and a single sensor near the top would miss developing hot spots lower down.

Are UV sensors worth it for a small horticultural operation?

It depends on what’s being grown and how sensitive the crop is to UV stress. For operations growing high-value crops susceptible to sunburn or UV damage, a sensor can justify itself by informing shade cloth timing and reducing losses. For lower-value or more UV-tolerant crops, the case is weaker, and budget may be better spent on weather or soil monitoring first.