A battery-powered, long-range wireless temperature probe for grain, cereal and crop stores — the cordless alternative to a traditional grain temperature spear. Deploy anywhere, monitor wirelessly, and protect your harvest with zero wiring — with optional air-quality and CO₂ spoilage detection built in.
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Wireless Range
Battery Life Per Charge
Temperature Accuracy
UK License-Free Band
The DTC3-WP wireless grain temperature probe drops into your grain, cereal or crop store and silently watches over your harvest for months on a single charge, making grain store and crop store monitoring effortless. Glance at the on-probe display for an instant reading, or let it report back automatically — no wires, no mains power, no maintenance visits. Whether you call it a grain probe, a grain spear or a grain temperature sensor, the DTC3-WP replaces it all, wirelessly.
Drops into ultra-low-power mode between readings, so a single charge keeps watch for months — even years on long-term storage settings. No battery anxiety mid-season.
Long-range radio reaches the controller right across large farm sites — through metal-clad buildings and between separate stores — with no cabling to run or trench.
Reads grain-bulk temperature to ±0.2°C, catching the early warming that signals trouble long before it spreads through the store.
A built-in display shows live temperature and battery the moment you press the button — a quick walk-by health check without reaching for your phone or laptop.
Configure your probes with 'just above grain' air temperature, humidity and CO₂ sensing. Rising CO₂ in the headspace is one of the earliest warnings of spoilage and hidden insect activity — spot it before you can smell it.
Fully self-contained with an integrated rechargeable battery. Place it in the store and walk away — a simple battery charge top-up is all it ever needs.
An accurate fuel gauge reports the true remaining battery percentage, giving you fair warning to recharge so you never lose visibility on a store.
The probe creates its own private WiFi hotspot. Connect, set how often it reports, and check status straight from your phone browser — no app to install.
Adding a probe is deliberately tamper-proof: a press of its button during pairing links it to your controller. Probes in a neighbouring store can never pair to your system by accident.
A sealed, IP41-rated enclosure, industrial-grade sensing and a robust long-range radio keep it working reliably through harvest-season heat, winter cold and everything in between.
Unbox, switch on and place the probe in your grain store. No wiring, no mains supply and no installation tools needed.
Put your controller into pairing mode and press the button on the probe. It links securely to your system — and only yours — in seconds.
Readings report back at the interval you choose. The DTC3 uses them to track your grain and intelligently control aeration fans.
Need to adjust? Join the probe's private WiFi hotspot and change how often it reports, straight from your phone browser.
Based on 1800mAh Li-Po battery
| Transmit Interval | Typical Use Case | Estimated Battery Life |
|---|---|---|
| Every 1 minute | Commissioning & testing | ~1 month |
| Every 15 minutes | Active monitoring | ~1 year |
| Every 30 minutes | Standard monitoring | ~2+ years |
The DTC3-WP works seamlessly with our Store Guardian product along with the DTC3 Controller, DTC3-RH humidity sensor, DTC3-RR remote relay control for preinstalled fan control panels, and DTC3-Cloud gateway to deliver complete grain storage monitoring from field to cloud.
Fully scalable to suit your requirements.
A wireless grain temperature probe (also called a grain temperature spear, grain temperature sensor, cereal temperature probe or crop temperature sensor) is a battery-powered device placed inside a grain store to measure temperature and report readings wirelessly. The DTC3-WP uses long-range 868MHz radio to send readings up to 2km to the DTC3 controller — no wires, no mains power.
Yes. Although it is usually called a grain temperature probe, the DTC3-WP measures the temperature of any stored cereal or crop — wheat, barley, oilseed rape, pulses, maize and more — helping prevent spoilage, hot spots and insect activity in any bulk store.
Around 2+ years at the standard 30-minute reporting interval and ~1 year at 15-minute intervals, from a single 1800mAh rechargeable battery recharged via USB-C or DC jack. An accurate fuel gauge reports the true remaining battery percentage.
2km+ line-of-sight using long-range 868MHz UK licence-free radio. Sufficient to reach across large farm sites and through metal-clad grain store buildings to the DTC3 controller.
No wiring whatsoever. The DTC3-WP is fully battery-powered and self-contained. Place it in the grain store, pair it to the DTC3 controller with a single button press, and it starts reporting immediately.
Yes. Deploy multiple DTC3-WP probes across a single store, or across several separate stores, for complete whole-store grain and crop monitoring. Each probe reports wirelessly to the DTC3 controller, letting you track temperature at different depths and positions and spot hot spots early. The system is fully scalable — add as many probes as your grain store or crop store monitoring needs.