Hog Fuel Pile Monitor

Hog Fuel Pile Fires are a relatively common occurrence in the mill and biomass fuel industries (as well as any industry that stores and maintains hog piles). Hog Pile Fires are difficult to extinguish and are extremely costly. Part of the predicament in preventing hog fuel pile fires is due to the fact that the internal temperature of the pile can reach combustion temperatures via composting effect alone and there are few external signals visible prior to combustion.

When combustion occurs, the hog fuel pile fire can be very difficult to combat effectively since the pile must be opened up and carefully extinguished (to prevent flare ups and damage to adjacent property). These types of fires threaten personnel and property unnecessarily.

This YouTube video demonstrates a hog pile fire purportedly started via spontaneous combustion:

Aretas Sensor Networks has invented a new solution for monitoring hog fuel pile internal temperatures to help warn site operators when internal temperatures reach a danger threshold.


The monitor is designed with a thermally isolated temperature probe designed to be inserted into the pile. Temperature readings are read out via the unit's display (for immediate inspection) and also transmitted via wireless to the bridge for online viewing, alerting and analytics. The unit is battery powered so power does not need to be present at the monitoring site.

The temperature probe contains noise reduction circuitry in the probe-body to help ensure noise-free temperature readings. The probe end is also machined from corrosion resistant brass, which maintains excellent thermal conductivity

The unit has two probe tip options: 1) rigid pole mounted (for driving into the pile for spot meausrement / fixed rigid mounting) 2) Wired probe with dongle cable.

To test this custom solution, please contact Aretas Sensor Networks Today


Other applications include:

  • Biomass storage piles
  • Grain bins / grain piles / grain silos
  • Composting facilities
  • Municipal dump facilities
  • Hay bale piles
  • Agricultural product storage (prevent spoilage)