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.

Heater in Kidney Dialysis Machine


Kidney dialysis machines purify the blood in patients whose kidneys have failed. Keeping the blood at body temperature to prevent thermal shock and heat water for a better job of cleansing the blood at higher temperatures is vital to this process.


Watlow engineering worked with the customer in perfecting this application:

  • A 0.125-inch (3 mm) thick flange attached to the 0.625-inch (16 mm) diameter by 7-inch (18 cm) long FIREROD® heater. The flange kept the FIREROD concentric with the plastic tube (which would melt if near the heater). The customer was assured of a flange perpendicular to the FIREROD by a one-hundred percent inspection of the units by Watlow.
  • Passivation was necessary so that rust would not enter the water which mixes with the blood.
  • -Since this was "patient care equipment," a Type LL (special low leakage) FIREROD heater capable of maintaining leakage below 15 micro-amps (0.0000015 amp) had to be supplied.