IntraSense In-vivo Sensor

IntraSense in-vivo pressure sensor

IntraSense size comparison

IntraSense size comparison

IntraSense evaluation kit

IntraSense evaluation kit

The IntraSense is an extremely small in-vivo pressure sensor for integration in catheters with only 1 French diameter. A highly flexible, fully protected cable is already connected to the sensor with dimensions of only 750 μm × 220 μm × 75 μm in order to make the use by the customer as easy as possible.

The absolute pressure sensor provides accurate and stable values in the range of approx -300 up to 500 mmHg. The sensor is designed for operation in air and saline fluids such as blood, cerebral fluid or urine.

A light-protected version is available as IntraSense SMI-1B. This allows applications with built-in lighting such as endoscopic use.

The calibrated version provides a fully temperature compensated pressure and temperature signal via a 5-pin connector. The accuracy of the pressure value is typically +/- 2 mmHg. Alternatively, an uncalibrated version is available in two versions: with stripped cable ends (2 cm length, (“BAUU”) or with a small PCB, pin connector and two resistors closing the Wheatstone-bridge (“BBUU”). Cable length and pressure range are customizable.


  • Standard cable length 60 cm or 180 cm
  • Optionally with light protection
  • Standard pressure range 460 mmHg to 1260 mmHg absolute
    (equals -300 mmHg to 500 mmHg relative to standard atmosphere)
  • Uncalibrated version either as Wheatstone-half-bridge open-ended (“BAUU”) or Wheatstone-full-bridge with PCB and 4-pin header (“BBUU”)
  • Calibrated version with both I²C and analog output either for 3.3 V (“BMAP”) or 5 V supply voltage (“BMAR”)


An evaluation kit is available for easy testing of the IntraSense. The pressure and temperature signals can be read via a USB interface using the free open-source Arduino software. The evaluation kit is available in the normal as well as light-protected version and comes with five readily calibrated sensors.


  • Dimensions: 750μm × 220μm × 75μm – fitting a 1-French diameter catheter
  • Pressure range: 460 .. 1260 mmHg absolute (equals -300 .. 500 mmHg relative)
  • Proof pressure: -400 .. 4000 mmHg
  • Cable already assembled
  • Optional light protection for endoscopic applications
  • Optionally calibrated and compensated in the temperature range of 10 ° C to 60 ° C
  • Output: mV (unamplified) or 0.5 … 4.5 V / I²C (calibrated version)
  • Current consumption unamplified sensor: typ. 0.7 mA
  • Overall error, typ.: +/- 2 mmHg, max.: +/- 8 mmHg


  • Embolization
  • Atrial Ablation
  • Atherectomy
  • Resuscitative Balloon
  • Occlusion of the Aorta
  • Thermodilution
  • Microvascular Obstruction
  • Endoscopy
  • Intracranial Pressure
  • Fractional Flow Reserve (FFR)
  • Reproductive Health
  • Aortic Control
  • Compartment Syndrome
  • Endourology
  • Glaucoma
  • Cochlear Implant

Available Types

The evaluation kits for prototyping are available in the following variants:


Or as already calibrated probes in the following four variants:

NameCalibrated pressure rangeCompensated temperature rangeSupply voltage(V)Light shield
SMI-1A-48-xxx-BMAP460 .. +1260 mmHg10° – 60°C3,3no
SMI-1B-48-xxx-BMAP460 .. +1260 mmHg10° – 60°C3,3yes
SMI-1A-48-xxx-BMAR460 .. +1260 mmHg10° – 60°C5,0no
SMI-1B-48-xxx-BMAR460 .. +1260 mmHg10° – 60°C5,0yes

where ‘xxx’ is the cable length in cm.

Or as uncalibrated probes in the following four variants:

NameRecommended pressure rangeDiameter of catheterProximal terminationLight shield
SMI-1A-48-xxx-BAUU460 .. +1260 mmHg1 French3 stripped wiresno
SMI-1A-48-xxx-BBUU460 .. +1260 mmHg1 French4-Pin PCBno
SMI-1B-48-xxx-BAUU460 .. +1260 mmHg1 French3 stripped wiresyes
SMI-1B-48-xxx-BBUU460 .. +1260 mmHg1 French4-Pin PCByes

For information on prices and delivery times or if you have any technical questions, please contact