Skip navigation
Machine Design

Water Sensor

Testmate water sensors (TWS-C) continuously monitor hydraulic and lubrication fluids for applications in the power-generation, pulp and paper, steel, and plastics industries.

The TWS-C measures water content relative to the percent saturation of the fluid, and ranges from zero (absence of water) to 100 (100% water). A special capacitance sensor absorbs water molecules from the fluid and changes the capacity value that is directly related to the saturation level of the fluid. An integrated thermoelement on the sensor measures fluid temperature from 13 to 212°F. Both this value and the degree of saturation are reported as a 4 to 20-mA signal.

The TWS-C can be directly installed into the hydraulic system with a threaded connection. Be sure to mount the sensor vertically in a known turbulent area with the mechanical connection pointing upwards in hydraulic applications. Additionally, the sensor should be fully submerged with fluid flowing freely around it.

The TWS-C is CE compliant. A declaration of conformity is available upon request, with relevant EMC standards as EN 61000-6-1, EN 61000-6-2, EN 61000-6-3, and EN 61000-6-4.

Schroeder Industries, 580 West Park Rd., Leetsdale, PA 15056, (724) 318-1100,

Hide comments


  • Allowed HTML tags: <em> <strong> <blockquote> <br> <p>

Plain text

  • No HTML tags allowed.
  • Web page addresses and e-mail addresses turn into links automatically.
  • Lines and paragraphs break automatically.