# RJC Enterprises, LLC > Fiber Optic Sensors for Medical Device Applications ## Pages - [RJC Customers](https://rjcenterprises.net/sensor-applications/rjc-customers/): See how current customers are using RJC sensors There are a number of RJC customers actively working on specialty vascular and intracranial applications, and these new products will be described once they are approved and released to the clinical market. See below for a couple of customers who have already brought RJC products to market: Arrow/Teleflex In 2003, Arrow/Teleflex began using RJC sensors/systems in their Intra Aortic Balloon Pump (IABP) product line. In this product line, the RJC Model 60 Fiber Optic Pressure Sensor is installed in the distal tip of the Arrow® Intra Aortic Balloon Catheter to record aortic pressure waveforms. To support […] - [A Guide to RJC Sensors](https://rjcenterprises.net/sensor-applications/a-guide-to-rjc-sensors/): A Guide to RJC Sensors Everything you need to know about fiber optic sensor products Navigation How Our Sensors Work Fiber Optics vs. The Competition Are RJC Sensors for You? How Our Sensors Work RJC Sensors are based on the Fabry-Perot interferometer, in which two minimally separated, partially reflecting surfaces form an optical reflecting cavity. If one of these surfaces is a pressure sensitive diaphragm, changes in external pressure cause a change in depth of the optical reflecting cavity, which in turn alters optical cavity reflectance spectra. For Temperature, the band edge in a special filter glass changes with temperature, […] - [Temperature Instrumentation](https://rjcenterprises.net/supporting-instrumentation/temperature-instrumentation/): Temperature Sensor Instrumentation The RJC Model 520 assembly is used with all RJC temperature sensor assemblies. This instrumentation sends specific wavelength light out to the sensor, the sensor modifies this light based on current sensed temperature, then reflects it back to the instrumentation. The instrumentation converts returned light to photocurrents, applies the sensor’s unique calibration information, and outputs a temperature measurement every second. Model 520 FOMA Fiber Optic Measurement Assembly Available 2017 The Model 520 Fiber Optic Measurement Assembly (FOMA) is used where the customer already has an existing instrumentation package. In this case, the FOMA becomes a sub assembly in […] - [Pressure Instrumentation](https://rjcenterprises.net/supporting-instrumentation/pressure-instrumentation/): Pressure Sensor Instrumentation The RJC Model 500 assembly is used with all RJC pressure sensor assemblies. This instrumentation sends specific wavelength light out to the sensor, the sensor modifies this light based on current sensed pressure, then reflects it back to the instrumentation. The instrumentation converts returned light to photocurrents, applies the sensor’s unique calibration information, and outputs 1,000 calibrated pressure measurements per second. Model 500 FOMA Fiber Optic Measurement Assembly Released 2017 The Model 500 Fiber Optic Measurement Assembly (FOMA) is used where the customer already has an existing instrumentation package. In this case, the FOMA becomes a sub assembly in […] - [Accessibility statement](https://rjcenterprises.net/accessibility-statement/): Accessibility Statement for rjcenterprises.net RJC Enterprises is committed to ensuring digital accessibility for people with disabilities. We are continually improving the user experience for everyone and applying the relevant accessibility standards. Conformance status The Web Content Accessibility Guidelines (WCAG) defines requirements for designers and developers to improve accessibility for people with disabilities. It defines three levels of conformance: Level A, Level AA, and Level AAA. RJC Enterprises is making constant efforts to improve the accessibility of its site and services in the belief that it is our collective moral obligation to allow seamless, accessible, and unhindered use for those of […] - [Careers](https://rjcenterprises.net/careers/): Interested in working at RJC? We hire our entry-level positions on a rolling basis and are always looking for new applicants. Let us know you’re interested and we’ll try to find you a spot on one of our assembly lines. No matter where you work at RJC, we want to ensure that you’re satisfied with your job. That’s why every position works a wide variety of stations. You’ll feel like an expert on the whole process, not just a single workstation. On top of that, we offer excellent health and dental benefits for full-time employees, as well as a friendly […] - [Home](https://rjcenterprises.net/): FIBER OPTIC SENSORS FOR MEDICAL DEVICE APPLICATIONS Ultra-small pressure and temperature sensors backed by state-of-the-art optical instrumentation RJC Product Overview RJC Sensor Assemblies and Instrumentation Every RJC sensor needs an RJC instrument, whether you want a stand-alone device or something you can integrate into your own system Every RJC sensor carries a unique calibration on an RFID tag and requires an RJC Model 500/520 instrument for operation. Sensors » Nearly microscopic in size » Accurate with high resolution » Durable glass construction Pressure Temperature Instrumentation » Stable over many days » Compatible with all RJC sensors » Flexible design Pressure […] - [Frequently Asked Questions](https://rjcenterprises.net/history/frequently-asked-questions/): Frequently Asked Questions General How can I make sure I am getting started correctly?Refer to the User Instructions and follow the Getting Started steps as outlined. Is the sensor already calibrated?The sensor is calibrated at RJC with instrumentation traceable to the National Institute of Standards and Technology. The calibration is written to an RFID tag located within the optical connector, and is read by the instrument when the connector is inserted into the instrument. Fiber Optic Temperature How do I know if the Temperature Sensor system is working correctly?Place the temperature sensor in the TRM and wait until the temperature stabilizes. If the […] - [Publications](https://rjcenterprises.net/publications/): Publications Discover a few of the ways we’ve shaped the fiber optic sensor industry Development of Medical Pressure and Temperature Sensors Employing Optical Spectrum Modulation Roger Wolthuis et. al., IEEE Transaction on Biomedical Engineering, vol. 38, no.10, October 1991. Development of a Medical Fiber-Optic Oxygen Sensor Based on Optical Absorption Change Roger Wolthuis et. al., IEEE Transaction on Biomedical Engineering, vol. 39, no.2, February 1992. Development of a Medical Fiber-Optic pH Sensor Based on Optical Absorption Roger Wolthuis et. al., IEEE Transaction on Biomedical Engineering, vol. 39, no.5, May 1992. Development of a Dual Function Sensor System for Measuring Pressure […] - [History](https://rjcenterprises.net/history/): Interested in joining our team? Our sensor and instrument assembly lines are hiring on a rolling basis. Visit our careers page to learn more about what kinds of opportunities RJC might have for you. Careers MICROSCOPIC SENSORS SINCE 1997 For over 25 years, RJC Enterprises has been a leader in fiber optic sensing technologies. Our Bothell, WA office in 2025 Our Woodinville, WA office in 2004 RJC Enterprises, LLC was founded in 1997 as an OEM supplier of Fiber Optic Sensors and Systems for medical applications. The two founding members worked in an earlier startup, Technology Dynamics/MetriCor Inc., where they […] - [Legacy Products](https://rjcenterprises.net/legacy-products/): Legacy Instrumentation We’ve developed lots of instrumentation over the years and still perform maintenance on the following products Model 645 FOMA The Model 645 Fiber Optic Measurement Assembly (FOMA) is designed to support RJC Fiber Optic Pressure Sensors. This FOMA is a custom sub-assembly used within the Arrow/Teleflex IABP, has a protective aluminum enclosure, and uses customer supplied power and display capabilities. Dimensions: 6 x 6 in; less than 1.1 inch high Operating temperature range: 15 to 40°C Sensor calibration data: Datakey Outputs: RS232 & USB (analog optional) Output frequency response: DC to 100 Hz@ 1000 samples/second Power required: 12 VDC @ 260 mA(2.5 amp startup) EOL […] - [Temperature Sensors](https://rjcenterprises.net/sensor-products/temperature-sensors/): Temperature Sensor Assembly Small size for demanding catheter/guide wire applications (see table) Sensor chip (glass) is mounted on glass fiber assembly and may have glass capillary support (see picture) Immune to electromagnetic noise (cautery, MRI, RF, etc.) Sensor assemblies are available with or without a jacket Temperature Sensor Model and Dimensions Temperature Sensor Performance We tested each of six Model 120 Temperature Sensor Assemblies on a Model 520 Fiber Optic Temperature Measurement Instrument. Each Temperature Sensor Assembly was subjected to temperatures from 20 to 45°C, and the instrument response was plotted as shown. The attached Figure indicates very good linearity, […] - [Pressure Sensors](https://rjcenterprises.net/sensor-products/pressure-sensors/): Pressure Sensor Assembly Small size for demanding catheter/guide wire applications (see table) Sensor chip (glass) is mounted on glass fiber assembly and may have glass capillary support (see picture) Immune to electromagnetic noise (electrosurgery, MRI, RF, etc.) Sensor assemblies are available with or without a jacket Pressure Sensor Models and Dimensions *A capillary pedestal is optional for the Model 42 Sensor Assembly Pressure Sensor Performance We tested every combination of ten randomly chosen Model 63 Pressure Sensor Assemblies and ten randomly chosen Model 500 Fiber Optic Pressure Measurement Assemblies. Each Sensor Assembly was subjected to pressures from -30 to 250 […] - [Contact Us](https://rjcenterprises.net/contact-us/): Get in touch with us foinfo@rjcenterprises.net +1 (425) 481-3281 Fill out our contact form below Our Commitment RJC Enterprises seeks to build long-term, personal relationships with each of its customers to meet their changing needs. When you contact RJC, we want to ensure that our products are the best fit for you. If our sensors are a good match, we help to adopt and integrate them into your proprietary product. Confidentiality Any information provided to RJC, including identity of the customer, is treated as confidential until the product is on the market. Address RJC Enterprises11711 North Creek Parkway S., D-103Bothell, […] - [Privacy Policy](https://rjcenterprises.net/privacy-policy/): Who we are Our website address is: https://rjcenterprises.net. Cookies We use only the cookies we have deemed absolutely necessary for this website to function. 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