Fiber Optic Micro-Catheter Pressure Transducers (FISO-LS Series)

FISO-LS Signal Conditioners and Chassis

Unique electronics plus fiber optics produces accurate pressure data at high speed, making instantaneous pressure change analysis possible.

FISO–LS series pressure sensors were designed as semi-disposable for multi-use applications in the life-sciences and small animal research. Unlike its disposable counterpart in clinical applications, this sensor is more robust with a protected tip.

The FISO Series Signal Conditioners and EVO Chassis are required for the use of any of the FISO–LS series fiber optic sensors.

FISO Fiber Optic Temperature Sensors are also available.

Item# Description U.S. List Price Quantity
75-0706 FISO-LS Fiber Optic Pressure Catheter - Standard, 0.9 F, 1.2 M Length, +/- 300 mmHg
75-0715 FISO-LS Fiber Optic Pressure Catheter- MRI, 0.9 F, 10 M Length, +/- 300 mmHg
75-0707 FISO-LS Fiber Optic Pressure Catheter - Standard, 2 F, 1.7 M Length, +/- 300 mmHg
75-0716 FISO-LS Fiber Optic Pressure Catheter- MRI, 2 F, 10 M Length, +/- 300 mmHg
75-0714 FISO-LS Fiber Optic Pressure Catheter - Standard, 2 F, 1.7 M Length, 0 to 10 Bar
75-0704 FISO FPI-LS Signal Conditioner, Single Channel, 15 kHz Analog Output
75-0713 FISO-LS Catheter Extension Cable and Remote Connect Adapter, 3 meters
75-0700 FISO Evolution Series EVO-2 Chassis, 24 VDC, 70 W, for Mounting up to 2 FISO Signal Conditioners
75-0701 FISO Evolution Series EVO-5 Chassis, 24 VDC, 70 W, for Mounting up to 5 FISO Signal Conditioners
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FISO-LS series catheters were designed as semi-disposable for multi-use applications in the life sciences and small animal research. Unlike its disposable counterpart in clinical applications, this sensor is more robust with a protected tip. The standard transducers have 1 meter of nylon sheathing to protect the fiber, where the 10 m transducers have 9.3 to 9.8 m of nylon sheath, further protecting the glass fiber. With proper use and care these sensors can be used many times.

All sensors are pre–calibrated at the factory and the transducer's calibration information is stored in a smart chip directly on the optical connector. The information is automatically read into the Evolution Software and downloaded to the FPI signal conditioner. No further recalibration is needed — simply zero the transducer.

  • Low noise
  • Accurate
  • Sensor located at tip of fiber
  • Easy to use
  • Pre-calibrated sensors

The FISO Series Signal Conditioners and EVO Chassis are required for the use of any of the FISO–LS series fiber optic sensors.

Applications

  • Neuroscience - intracranial pressure; blast wave and impact trauma
  • Cardiovascular - left ventricular pressure; arterial or venous blood pressure
  • Ocular Tonometry - non-invasive intracoular pressure tonometry
  • Urology - bladder/ureter pressure
  • Spine - intradiscal pressure
  • Bone - intramedullary pressure
  • MRI Gating - use the 10 M MRI sensor to measure pressure for gating

FISO Pressure Sensors
The FISO catheters utilize a Fabry-Pérot etalon which is comprised of two parallel reflecting mirrors on either side of a transparent medium, where the distance between the mirrors is known as the etalon cavity length. The transmission characteristic for the F-P etalon has distinct transmission peaks in wavelength as a function of the cavity length, physically corresponding to resonances of the etalon.

FISO’s pressure sensors are a flexible embodiment of the F-Petalon. A deformed membrane is assembled over a vacuumed cavity, thus forming a small drum-like structure. The sensing F-Pcavity is located between the base of the drum and the flexible membrane. When pressure is applied, the membrane is deflected toward the bottom of the drum, thus reducing cavity length. After appropriate sensor calibration, completed at the factory, each etalon cavity length corresponds to a specific pressure value. The signal conditioner is designed to determine the cavity length to the nanometer level, providing the researcher with an extremely accurate and repeatable pressure measurement system.

Modular Evolution Chassis
The EVO Chassis provides the power to the signal conditioner modules as well as the digital interface for data transfer between the signal conditioners and the Evolution Software. The EVO Chassis (2- and 5-channel version) includes the Power/Interface module, Evolution data acquisition and instrument control software, USB cable, power supply, and module removal tool. The Power Supply/Interface module has a USB2.0 output and includes the Evolution software. The 2–Channel chassis can house up to 2 FPI signal conditioning modules, while the 5–channel can house up to 5. Chassis do not need to be filled to capacity for use. Add more signal conditioners at any time up to the capacity of the chassis.

The data sampling rate of up to 15 kHz offers the ability to accurately detect fast–changing pressure signals, such as that from mouse heart. Visualize the dichrotic notch with ease! Data is either transferred into the computer via USB to the Evolution acquisition software (at up to 5 kHz) or via the analog output (up to 15 kHz) to an independent data acquisition system.

FISO Signal Conditioners
RS–232/RS–485 Digital Output onboard as well as a 0 to 5 V analog output. An analog output cable is supplied with a BNC connector to interface with common data acquistion systems. The FPI–HR series conditioners are compatible with the fiber optic temperature catheters. The FPI–LS series conditioners are compatible with the FISO–LS pressure catheters. The technique used internally to transmit and receive the light signal allows for continuous sensing that does not rely on light pulses. Since no light is pulsed there is no need for a minimum catheter length as with previous fiber optic sensors. A built–in fan keeps the signal conditioners from overheating or burning out the unit — no special foot stand required.

Catheter Extension Cable
Allows for the remote connection of the sensor 3 meters from the EVO Chassis/Signal Conditioner.

 

Specifications75-070675-071575-070775-071675-0714
Accuracy2 mmHg or better2 mmHg or better2 mmHg2 mmHg2 mmHg
CalibrationFactory Calibration no on site calibration neededFactory Calibration no on site calibration neededFactory Calibration no on site calibration neededFactory Calibration no on site calibration neededFactory Calibration no on site calibration needed
Coated Fiber Diameter300 µm300 µm640 µm640 µm640 µm
CoatingPolyimide, NylonPolyimide, NylonPolyimide, NylonPolyimide, NylonPolyimide, Nylon
Length1.2 meters10 meters1.7 meters10 meters1.7 meters
Measurement mediaFluid or gasFluid or gasFluid or gasFluid or gasFluid or gas
Pressure Range±300 mmHg±300 mmHg±300 mmHg±300 mmHg0 to 10 bar
Resolution< 0.1 mmHg< 0.1 mmHg< 0.3 mmHg< 0.3 mmHg< 0.3 mmHg
Sensitivity Thermal Effect< 0.04%/°C< 0.04%/°C< 0.05%/°C< 0.05%/°C< 0.05%/°C
Sensor Diameter300 µm300 µm640 µm640 µm640 µm
Standard bare fiber length20 cm20 cm70 cm70 cm70 cm
Storage temperature–40–+80°C (–40–176°F)–40–+80°C (–40–176°F)–40–+80°C (–40–176°F)–40–+80°C (–40–176°F)–40–+80°C (–40–176°F)
Tolerated bend radius10mm (0.4in)10mm (0.4in)10mm (0.4in)10mm (0.4in)10mm (0.4in)
Uncoated Fiber Diameter260 µm260 µm550 µm550 µm550 µm
Zero Thermal Effect0.2 mmHg*°C0.2 mmHg*°C0.4 mmHg*°C0.4 mmHg*°C0.4 mmHg*°C