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Watlow’s Adaptive Thermal Systems (ATS®) are a suite of  technologies that combine sensing, heating and controlling in innovative ways to improve the thermal performance of a customer’s application. ATS technology integrates foundational technology platforms including power conversion, multi-loop control and sensing, integrated TCH junction temperature control and high TCR materials based temperature control to optimize performance that is specific to the problem being solved.

Historically, engineers have compensated for system variation  with inadequate information. With ATS technology users now have the ability to listen and respond to the materials to enhance and simplify performance. ATS enables engineers to close the open loop and see what is going on in the system in real time. For example, locations where temperature sensing was previously impractical can now be measured utilizing heater circuits as additional sensors. Also, increasingly complex wire routings are simplified by using innovative multiplexing methods to integrate additional zones of control. Furthermore, heaters that have been design constrained due to geometry or electrical resistance can now be driven with an appropriately scaled down voltage level.

  • Protects ceramics from breakage
  • Lower sensor and integration costs
  • Real-time diagnostic feedback
  • Better uniformity with closed loop control
  • Fewer wires & less complexity
  • Immune to power quality issues


ats thermographic mapping

High TCR Material Based Temperature Control

>>> Measure change in resistance to convert every heater into a sensor

high temperature coefficient resistance heater materials
ATS system comparison

No time delay between heating and sensing

>> Improves thermal system response

>> Eliminates hysteresis with PID control 

Sensor is integrated into heater

>> Improves sensing reliability

Measure temperature without a separate sensor

>> Lowers sensor and integration costs

>> Reduces RF filtering

>> Enables closed loop control for better performance

>> Saves Space

>> Reduces complexity due to fewer wires

Power Conversion

>>> Regulate power up and down rather than on and off

ATS power conversion diagram

Gain total control of power quality

>> Eliminates noise injection into power distribution

>> Achieves high power quality without the high cost and added space of a dc power supply

Lower voltage drives low impedance heaters

>> Reduces power distribution rating with smaller fuses and wires, which saves money and space

>> Protects ceramics from breaking

Power is always on rather than duty cycling on and off

>> Provides real-time feedback

Line cycle synchronization

>> ensures immunity to power quality issues

>> Reduces noise

Multi-Loop Control and Sensing

>>> Increase heater zones while reducing wires

multi-loop control wires vs zones. ATS vs traditional.
multi-loop control and sensing comparison

High number of zones with minimal wires

>> Enables closed loop control without added sensors

>> Reduces overall system cost and complexity

>> Delivers a temperature gradient that was previously limited to only uniform set points

Control during dynamic and non-linear changes

>> Provides more accuracy than traditional PID control