HeatProbe Fluid & Fuel Warming System on Hydraulic Tank

Tank Heating System

  • Keep your fluids warm at -40* guaranteed
  • Protect against hydraulic equipment damage
  • Increase productivity and equipment performance


HeatProbe™ is an immersion tank heater designed to capture waste heat from hot engine coolant and transfer it directly into the tank’s fluid on any hydraulic equipment, warming up the contents, so that it can properly flow and be easily pumped during cold winter weather. This process eliminates huge amounts of downtime as well as expensive component damage that frequently occur from cold-thickened oils.

HeatProbes™ can be used in many bulk fluid transport applications such as IBC tote heating, water trucks, and lube tankers, to reduce their turnaround time and increase revenue. Multiple units can be installed and plumbed sequentially to ensure consistent temperature in larger applications.

HeatProbe™ Documentation



HeatProbes™ come in sizes ranging from 8” to 36” in immersion length. HeatProbe™ installs easily through any 1/2″, 1.25″, and 2″ threaded tank port and connects up to coolant lines with heater hose barbs. Thermex provides a weldless tank flange (retrofit sandwich flange) to create an available port for 2″ NPT applications.


• Heat up your hydraulics on the way to your job-site
• Keep water, oil and fluids from freezing, gelling or clouding
• Single probe heats up reservoirs from 1 to 80 gals (300 liters) capacity
• Multiple probes can be installed on large bulk tanks
• Warm up bulk oils while driving between deliveries
• Eliminate idle equipment and wasted man-hours waiting for products to warm up
• Protect against hydraulic pump cavitation’s and burst hose lines


Utilizing hot engine coolant to transfer waste heat through its finned surface directly into hydraulic fluid within a reservoir, HeatProbe™ installs easily though any 2 inch threaded tank port and connects into coolant lines with standard heater hose barbs. By keeping the hydraulic lines and fluid warm, it protects against burst hoses, hydraulic pump and/or PTO damage, as well as increasing productivity time in extremely cold weather.

Tank & Fluid Warming System – Business Case

HeatProbe™ Cost-Benefit Analysis

Unit Cost : $700 – $1,000
Installation : $500 – $800

Installed Cost : $1,200 – $1,800


Example for Cold Start/Asset Recovery:

When installed on machines equipped for PortaThaw®, HeatProbes™ assist the cold start process by adding heat into the hydraulic reservoir via circulating coolant being heated by PortaThaw®. This allows operators to resume full production almost immediately after the engine has been safely started rather than waiting for hydraulics to slowly warm-up from friction only. It continues to add or maintain heat as long as the engine is running.


Installed on CAT 797 Haul Truck showing average wait times:

Equipped with HeatProbes™ = 30 – 45 mins

Not equipped with HeatProbes™ = 2.5 – 3 hours


Average lost production = $55,000

Payback period: 5.5 minutes of use

Example for On-Road Vehicle Operations:

 When installed on a crane/service truck HeatProbe™ will rapidly raise the temperature of a typical hydraulic tank. On a-20℉ (-28℃) morning, the hydraulic reservoir temperature will climb 20℉ – 30℉ (16℃) within the first 20 minutes of driving, making the vehicle ready to operate as soon as it arrives at the job site.


Installed on Kenworth Tri-Drive Picker Truck showing average wait times:

Equipped with HeatProbes™ = 3 – 5 mins

Not equipped with HeatProbes™ = 45-70 mins


Average lost production = $300

Payback period: 6 hours