How to Monitor Grain Temperature?
Temperature is one of the most critical factors in successful grain storage. Left unchecked, this heat buildup can quietly destroy an entire harvest before a farmer even notices a problem on the surface.
Comparison of 4 systems of grain temperature monitoring
Grain conducts heat poorly. That's the core problem with stored grain: a hot spot caused by moisture, insects, or mold can build for weeks in the core of a bin or pile before it becomes visible at the surface. The method you use to monitor grain temperature determines how early you catch it and how much risk and labor it takes to do so.
Here's how the four main approaches stack up, in both silos and flat storage.
1. Wireless Smart Systems (e.g., Quanturi)
Wireless multipoint probes placed in the grain transmit to a base station, which uploads readings to an online software dashboard. Temperature data is available 24/7, continuously.
- Insert the probe into the grain bed to the desired depth
- Turn on the power for the base station
- Log in to your application to view temperature data remotely; no wires or technical knowledge required. Quanturi's support team is available to help you during the process.
Who can use the Quanturi system?
The Quanturi system is built for anyone who needs to protect bulk agricultural commodities from temperature-related spoilage. This includes farmers, commodity traders, port facilities, seed companies, and dry fruit storage operators.
Request more information about the system.
Customer reviews about the Quanturi system:
1. Use case: Blomberg Stevedoring Ab
Blomberg Stevedoring Ab, which operates in the ports of Vaasa, Kalajoki, and Kristiinankaupunki, specializes in bulk handling of grain and raw materials for feed production, offering its customers logistics services, testing, analysis, and storage facilities.
"When the system alerted them to the irregular temperatures, the freight forwarder informed the owner of the raw material batch immediately. At the owner's request, the batch was moved to another store to bring the temperature down to a safe level. By reacting to the temperature increase quickly and early enough, they prevented damage estimated at €250,000." Terminal Manager Kari Seranto, Blomberg Stevedoring
2. Use case: Ernst Conservation Seeds
"Quanturi was chosen for its intuitive software interface and the versatility of its probes, which can be easily used across different storage structures and commodities. Ernst Conservation Seeds required a solution that was less permanent and more flexible than traditional grain bin sensing products, allowing them to adapt to changing storage needs without installing fixed equipment." Warehouse Manager, Kevin Jamison
Request more information about the system.
2. Manual Method (No Equipment)
Walking the bin or pile and checking for visual or sensory cues. There is condensation, crusting, odor, and insects on the surface.
Disadvantages:
- No actual temperature data, only symptoms that show up after spoilage has started
- In silos, only the top hatch is accessible. The core, where hot spots usually form, is unreachable
- Requires climbing bins or walking on pile surfaces, both genuine fall/entrapment risks
- No record-keeping for quality assurance or insurance
3. Thermometer/Probe Method
Insert a long probe thermometer at intervals across the surface.
Disadvantages:
- Samples only a handful of points; hot spots between probe points are easily missed
- Manual labor required at every check, across every bin and location
- Single point-in-time reading, with no trend data between checks
- Standard probes can't reach the depth of tall silos or large flat piles
4. Cable Sensor Systems (Wired)
Fixed sensor cables are hung in the grain mass before filling and wired to a readout panel.
Disadvantages:
- High installation cost; must be installed before or during filling, making it hard to retrofit
- Cables are vulnerable to damage from augers, loaders, and rodents. One break loses that entire string
- Coverage is fixed at installation and can't be adjusted later
- Poor fit for flat storage, where wide horizontal coverage matters more than depth
- Usually still requires walking to a local panel rather than allowing remote access
What is the best method to monitor grain temperature?
For operations storing grain for weeks or months, wireless smart monitoring is the clear choice. The Quanturi system adapts to different commodities (grain, wheat, oilseeds, dry fruit, cotton, etc.) and storage types such as flat storage and small bins. Ernst Conservation Seeds in the U.S. chose this approach for that same flexibility across their storage structures.
The system can also run on solar power where electricity isn't available. It's a plug-and-play system and does not require technical setup, such as a cable system.
It's the only method that delivers continuous, multi-point data across a storage's full depth and footprint, with no climbing bins or walking piles required. It catches hot spots early, sends temperature alerts, and automates aeration, so fans run only when needed, reducing both spoilage risk and electricity costs.
Quanturi Supervisor software brings all of a storage operator's facilities into a single dashboard. Operators can assign regional managers and monitor every storage sensor remotely, without needing to travel between locations.
What happens when grain temperature isn't monitored:
- Mold and fungal growth: Warm, moist pockets inside a grain mass create ideal conditions for mold, which can produce mycotoxins — harmful compounds that make grain unsafe for food or feed use.
- Insect infestation: Most storage insects thrive in warmer temperatures (typically above 15–18°C). Rising grain temperature can signal — or accelerate — an infestation long before it's visible from outside the bin.
- Spontaneous heating ("hot spots"): Grain is a poor conductor of heat, so warm zones can form deep within a silo and go undetected for weeks, leading to caking, discoloration, reduced germination, and in severe cases, spoilage of entire batches.
How does moisture relate to temperature in storage?
Temperature differences between the core and the outer layers of stored grain cause moisture to move and condense in cooler areas, creating localized wet spots that further fuel mold and insect activity.
Why does grain get hot?
Grain is a living, biologically active material even after harvest; it continues to "breathe," and that respiration, combined with moisture, pests, and microbial activity, generates heat.