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RdF Corporation ISO 9001 Certified

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Specialists in temperature and heat flow measurement. Products include RTD's (platinum, nickel, copper), thermocouples, thermowells, sanitary sensors, foil sensors and heaters, heat flux sensors, surface sensors and temperature transmitters.

Founded in 1955, RdF has been selected as the vendor of choice on many critical aerospace, aircraft and industrial programs.

Special Purpose Surface Sensors

...for applications where direct immersion measurements are not possible or practical due to factors such as space limitations, component geometry, cost, etc.

The vast number of different surface sensors engineered and manufactured by RdF precludes the description of any single unit. It is sufficient to state that RdF designs each specialized application with an approach that considers element selection, associated instrumentation, body configuration, mounting requirements, and environmental parameters including pressure, shock, and vibration.

Current production includes surface sensors having thick stainless steel bodies—both flat and preformed—which are designed to withstand tremendous pressures; flexible sensors which adapt to very small radii; thin low-mass sensors designed for minimal interference with the physical characteristics of the surface, and environmentally sealed sensors capable of operation in the vacuum of outer space.

Cryogenic Sensors

...for the measurement of cryogenic liquids and gasses in liquid-fuel rocket propulsion systems.

Sensors for this type application must not only operate at very low temperatures (down to -452°F) under widely varying environmental conditions but also must be able to withstand extremely high dynamic shock and vibration levels. The hollow annulus configuration of the sensor incorporates a hermetically sealed double-wall sensing element which is capable of surviving severe mechanical environments. This feature also minimizes the thermal mass of the sensing element this assuring a rapid speed of response. The element wire is Reference Grade Platinum wound on a stainless steel mandrel and insulated by aluminum oxide. These materials, along with special manufacturing techniques, assure strain-free reliability at the sensor. In addition, these sensors are often fabricated to provide an icepoint resistance of up to 2500 ohms for maximum resolution at very low temperatures.

Nuclear Power Plant Sensors

...for the measurement of coolant and core temperatures within reactor containment buildings.

Nuclear applications present particularly stringent requirements and necessities. These RdF designed and manufactured sensors had to be capable of 40 years' continuous operation at elevated temperatures and under radiation exposure. In addition, the sensors had to be able to withstand a design base event such as a seismic occurrence with subsequent loss of coolant or a steam line rupture. The sensors also met all requirements for Class IE equipment as defined by IEEE-323-1974 and IEEE-344-1975 (seismic).