The global impact of COVID-19 on our people and the global economy is significant, and Watlow has taken a comprehensive approach to deal with the current crisis. Our contingency planning includes protecting our team members, communicating often with our customers and partners and maintaining the continuity of supply lines.

At the beginning of the pandemic, we set two priorities that guide our responses and decisions: the health and safety of our team members while continuing to supply essential products needed by our customers.

If you have questions about how the pandemic is impacting Watlow or Watlow’s response, please contact your Watlow representative.

Heating Fuel Oil Through Processing


The customer needed to keep the fuel oil heated during long periods of cold weather.


The customer had a 10,000 gallon underground storage tank used for storing #4 fuel oil. During long periods of cold weather, the temperature of the fuel oil drops to a point that makes it difficult to pump fuel oil from the tank.

The customer was using this fuel oil to fire a large boiler. In the past the storage was not being heated, which created the problem.


The heater chosen was a specially manufactured over-the-side heater. This heater was chosen since it could be installed through a manhole in the top of the tank. The elements were conformed in such a manner that allowed the heat to be concentrated around the pick-up tube.

This special over-the-side design allowed the heater to be installed in the large tank without having to empty the tank or cut any additional holes. The heater was constructed of steel using 8 W/in² with a moisture and explosion resistant housing.