RTDs / Custom Capabilities
RdF specializes in the design, qualification and manufacture of RTDs customized to suit challenging applications.
Our part library features thousands of sensors dedicated for customer specific uses, from simple, cost-effective modifications to catalog items to highly-configured sensors with dedicated baseline controls, qualification & acceptance testing programs.
Highlights include:
CRYOGENIC RTDs
A. Commercial Cryogenic RTD, calibration options including -430°F (-256°C) for LH₂ service. Configurable probe diameter (0.093” min), length, resistance values.
B, C, D. Various examples of RdF’s Hollow Annulus LH₂ probe designs
NUCLEAR RTDs
RdF’s Quality Management System is certified to:
10 CFR 50 - Appendix B, 10 CFR 21 NQA-1, CSA Standards N299.1, .2, .3
A. Bolt-on RTD
B. Strap-on RTD
C, Axial Lead Thin Film RTD
D. Thin Film Board Mount RTD
E. Reference Grade Wire-wound Bridge RTD
F. Thin film surface RTD
RdF’s unique production & calibration techniques extend the useful range of the platinum RTD to -434°F (-258°C), far below the minimum temperature rating charted in IEC 60751.
Our exclusive hollow annulus platinum element combine fast response with high pressure capability and ruggedness.
RdF has qualified platinum RTD probes such as these for use in launch vehicles, fuel cells and more.
Specifications
Temperature Range: -434 to 500°F (-258 to 260°C)
Response Time: as fast as 0.3 seconds
Accuracy: ± 0.14°C with custom calibration
Ice Point (0°C) Resistance: 100Ω, 1000Ω, 2000Ω and custom
Pressure Rating: 2,500 to 5,000 psi (operating), up to 20,000 psi
RdF temperature sensors for nuclear power generation plants include both qualified Class 1E safety-related, Balance-of-Plant, in-plant HVAC and other general use RTDs.
Our proprietary manufacturing process minimizes thermal mass in the sensing area and reduces strain, thus providing superior accuracy, repeatability and long-term stability.
RdF also customizes sensors with targeted tolerance at higher temperatures to provide tighter accuracy at specific control point..
Our sensors have served the PWR, BWR, CANDU and AP1000 fleets for decades.
Temperature Range: Standard -200 to 400°C, High temperature to 660°C.
Response Time: < 3 seconds to reach 63.2% of a step change in temperature in water flowing at 3 feet per second transverse to the sensor, depending on probe style, without thermowell
Accuracy: Class A or better, as requested by customer
MTBF: > 100 years
Qualification: Environmental including thermal & radiation aging, LOCA/HELB simulation, EMC/EMI testing, Vibration; Seismic to customer specified levels, IEEE STD 344-1987, IEEE STD 382-1996
CUSTOM SURFACE MOUNT RTDs
RdF’s thin-film and wire-wound surface RTD designs and proprietary processes provide sealed, fast, tough, small flexible sensors to conform to any specified surface configuration. We regularly modify or customize hardware for application specific mounting requirements.
The bulk of our designs are suitable for use in temperatures as low as -320°F (-200°C), and feature specialty cable leads.
RdF has qualified sensors of this style for deep space and harsh industrial conditions.
Specifications
Temperature Range: -320 to 645°F (-200 to 340°C)
Response Time: as fast as 0.3 seconds
Accuracy: ± 0.14°C with custom calibration
Ice Point (0°C) Resistance: 100Ω, 500Ω, 1000Ω and custom
AIRCRAFT RTDs & Thermistors
A. Flange Mount Environmental System Sensor
B. Thread Mount Environmental System Sensor
C, Turbine Engine Oil Temperature Sensor with Full Bridge Circuit
D. Turbine Engine Oil Temperature Sensor
RdF provides custom RTDs and packaged Thermistors for use in numerous aircraft applications. Common case materials include Aluminum, Stainless Steel, Inconel and Hastelloy.
RdF sensors have been qualified to RTCA DO-160 and recieved FAA-PMA approval.
RdF also produces Aircraft Windshield RTDs, an unusual sensor embedded in heated windshields to optimize structural integrity. Special materials and resistance values are required. RdF also provides control RTDs for Ice protection systems.
