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Rosemount™ 403VP PUR-Sense™ Conductivity Sensor
rosemount 403 and 403vp sensor
The Rosemount 403 and 403VP sensors are intended primarily for measuring conductivity in water-for-injection (WFI).
The sensors are also used in water purification systems in the food and beverage industry.
Rosemount™ 403VP PUR-Sense™ Conductivity Sensor


Ambient Temperature
32–221 °F (0–105 °C). Sensors are steam sterilizable to 275 °F (135 °C)
403 sensor with 10 ft (3.1 m) cable: 2 lb (1.0 kg)/3 lb (1.5 kg)
403 sensor with 50 ft (15.2 m) cable: 4 lb (2.0 kg)/5 lb (2.5 kg)
403VP sensor: 1 lb (0.5 kg)/2 lb (1.0 kg)
(rounded up to nearest 1 lb or 0.5 kg)


  • Sanitary design meets USP Class VI requirements
  • Selectable cell constants of 0.01, 0.1, and 1.0/cm
  • 21CFR177 Compliance for all wetted plastics and elastomers
  • 0.4 Micrometer Ra finish for wetted surfaces
  • Comes with Variopol (VP6) quick disconnect fitting