Medium Viscosity Pure Silicone Fluids for use in Flow Control, Temperature Control, Pressure Control, Motion Control, and Vibration Control Instruments, Gauges & Sensors

Description: Medium Viscosity Pure Silicone Fluids are clear, colorless, and odorless linear Polydimethylsiloxane fluids / PDMS Silicone Oils that range in viscosities from 50cSt to 1,000cSt (centistokes) @ 25°C. They are characterized by their low pour points, high flash points, wide service temperature range, low viscosity change at temperature (low VTC), excellent lubricity, stability under high pressure, high dielectric strength, RI Values between 1.3970 to 1.4000, and inertness to virtually all substrates.

Chemical Name: Polydimethylsiloxane Fluid / PDMS Silicone Oil

CAS No: 63148-62-9

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Availability: 1‐gallon (3.785 liters), 5‐gallon pail (18.9 liters), 55‐gallon drum (208 liters) & 275‐gallon IBC Tote (1,040 liters)

Medium Viscosity Silicone Fluids are used in a wide range of instruments, gauges, sensors and meters to monitor and control temperature, pressure, vibration, motion & humidity. Their thermal properties and high damping action help to ensure the most accurate reading in the gauges/instruments/meters, switches and sensors, under the most adverse conditions.

Product Data:

Viscosity (cSt) Specific Gravity Refractive Index Pour Point Flash Point (open cup) V.T.C Thermal Expansion (cc/cc °C) Thermal Conductivity g/cal/cm/sec °C
50 0.960 1.402 -55°C 285°C 0.59 0.00106 0.00036
100 0.966 1.4030 -55°C 315°C 0.60 0.00096 0.00037
200 0.968 1.4031 -50°C 315°C 0.60 0.000960 0.00037
350 0.970 1.4032 -50°C 315°C 0.60 0.00096 0.00037
500 0.971 1.4033 -50°C 315°C 0.60 0.00096 0.00038
1,000 0.971 1.4035 -50°C 315°C 0.61 0.00096 0.00038

Long‐term Service Temperature Range

Fluid Closed to Air System
PSF‐50cSt Silicone Fluid ‐40°C to 230°C
PSF‐100cSt Silicone Fluid ‐40°C to 230°C
PSF‐200cSt Silicone Fluid ‐40°C to 230°C
PSF‐350cSt Silicone Fluid ‐40°C to 230°C
PSF‐500cSt Silicone Fluid ‐40°C to 230°C
PSF‐1,000cSt Silicone Fluid ‐40°C to 230°C


  • 100% PDMS Silicone Oils
  • Wide Service Temperature Range
  • High Flash Point
  • Low Pour Point
  • Low viscosity change at temperature (low VTC)
  • RI Values between 1.3970 to 1.400
  • Hydrophobic
  • Good Heat Capacity Values
  • Stable under High Pressures
  • High Dielectric Strength
  • High Damping Action
  • Newtonian behavior under shear
  • Excellent Lubricity
  • Compatible with virtually all O‐rings, gaskets, valves, pumps, actuators, cables and seals

For use in:

  • Flow Control Instruments, Flow Meters, Flow Measurement & Flow Control Gauges
  • Temperature Control Instruments, Temperature Sensors, Temperature Meters & Temperature Gauges
  • Temperature Monitoring Systems & Temperature Measurement Instruments including Thermocouple Cables
  • Temperature Testing Equipment, Temperature Calibration Equipment
  • Thermometers for Laboratory and Industrial Use
  • Flow Modeling & Flow Testing Equipment
  • Pressure Control Instruments, Pressure Sensors, Pressure Meters & Pressure Control Gauges, Pressure Regulators
  • Pressure Monitoring Systems, Pressure Calibration Equipment & Pressure Testing Equipment
  • Motion Control Instruments & Motion Control Gauges
  • Vibration Damping and Vibration Testing Equipment
  • Humidity Control Instruments & Humidity Control Gauges
  • Level Monitoring Equipment & Level Measuring Switches
  • Hydraulic Pumps, Calibration Pumps, Actuators
  • Automatic Timing Devices
  • Cable And Wire Harness Assemblies Electronic Connectors, Electric Switches, and Electro‐Mechanical Components, MEMS Technologies
  • Electrical Testing Equipment
  • Seismic Cable Technologies
  • Underwater Camera Equipment
  • Underwater Robotics & ROV Technologies
  • Digital Display Equipment

Industries & Fields of Research include:Flow Control, Temperature Control, Pressure Control, Deep Sea / Subsea Technologies, Deepwater, ROV Technologies, Temperature and Process Controllers, R&D, Education, Defense, Oil & Gas Exploration, Energy, Aviation, Avionics, Aerospace, Life Sciences, Renewable Energies, Turbine Technology, Wind Power Technology, Geothermal, Solar Industry, Sensor Technology, Geosciences, Electronics, Environmental, Electrical Testing, Optics, LED, Photonics, MEMS Technology, Refractive Index Matching Digital Display Technology, Laser Technology Research, Earth & Atmospheric Sciences, Seismic Research, Oceanography Research, Physical Sciences, Testing Laboratories, Chemical Engineering, Mechanical Engineering, Plasma Research, LCD Technologies, Polymer Research, Computer Engineering Research, Robotics Research, Plastic Manufacturing, Rubber Manufacturing, Thin Film Coatings, Ozone Safe Solvents, Hydraulics, Nanotechnology Research, Geothermal, Fuel Cell Technology, Hydrophobic Coatings, Lighting Systems, Seismology, Film Preservation, Aeronautics, Pipe & Tubing Systems, Touch Screen Technology, Fiber Optics, Touch Monitor Technology, Touch Screen Technology

Federal Specs Met: meet Federal Specification VV‐D‐1078 "SILICONE AS DAMPING FLUID" and are used in a wide range of military, industrial and avionic gauges, meters, instruments, and monitoring systems.

Meets Requirements Of NSN Codes: NSN 9150‐00‐435‐2712, NSN 9150‐00‐087‐4046, NSN 9150‐00‐137‐6343, NSN 9150‐00‐024‐9621, NSN 9150‐00‐607‐0897, NSN 9150‐00‐664‐0111, NSN 9150‐00‐543‐7219, NSN 9150‐00‐487‐4219, NSN 9150‐01‐219‐5229.

Environmental: Low Viscosity Silicone Fluids are exempt from Federal VOC regulations, including California (CARB) and OTC regulations. They are HAP‐free and do not contribute to ozone‐depletion and global warming. In addition, they meet RoHS Compliancy.