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Application Notes

Coolant Flow Sensors in Medical Lasers

December 9, 2020

Laser sensor image version LG-2.

A low-flow switch is used to indicate loss of coolant flow. Coolant liquid helps protect critical and expensive equipment from overheating and becoming damaged. A Normally Open switch will close when the coolant flow rate is above the switch's setpoint, indicating proper flow. If the flow rate drops below the setpoint, the switch will open and shut down the system to prevent damage and keep personnel safe. This fail-safe logic is crucial, as it will also shut down equipment in the event of a loose connection or broken wire.

Challenge

Reliable Coolant Flow While Ensuring Patient Safety

Coolant liquid is critical in many applications. The sensor must be reliable, repeatable, compact, and cost-effective. One application is for medical lasers, where coolant flow is critical for patient safety and equipment protection.

Solution

FS-380P Coolant Flow Switch

Gems Sensors & Controls FS-380P Coolant Flow Switch was chosen for several reasons:

  • With setpoints down to .07 GPM, it can work with very low flow ranges and still sense loss of flow
  • A glass-reinforced polypropylene body makes the sensor lightweight, economical, and chemically compatible with numerous media.
  • With ¼" Quick Disconnect ports it enables installation to be quick and reliable, and the ability to be interchangeable with many different port types and sizes.

Additional Features

  • Multiple setpoints from .07 up to 2.0 GPM
  • 0F to 212F Operating Temperature Range
  • Inline design limits any pressure drops

Additional Applications

Learn more about FS-380P >