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
| RJC System Performance | System Performance specified by IEC 60601-2-34, 3rd Ed. | |
|---|---|---|
| Pressure Range | -30 to 250 mmHg | -30 to 250 mmHg |
| Accuracy | Goal of +/- 2 mmHg or 2%, whichever is greater | +/- 4 mmHg or 4%, whichever is greater |
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 mmHg, and the instrument response at 100 mmHg was selected as a measure of overall accuracy.
The attached Figure illustrates the following requirements:
- IEC 60601-2-34 accuracy requirement of +/- 4 mmHg in orange
- RJC‘s more stringent accuracy goal of +/- 2 mmHg in green.
Maximum RJC pressure measurement errors
at 100 mmHg were only +/- 0.75 mmHg.
| Resolution | Better than 0.1 mmHg | No specification |
|---|---|---|
| Temperature Coefficient | < 0.15 mmHg / °C | No specification |
| Ambient Operating Temperature | 15 to 45°C | No specification |
| Frequency Response | DC-100 Hz (extended range available) | DC-10 Hz, minimum |
Pressure Sensor Zero Stability
Five Model 63 pressure sensor assemblies and five Model 500 instrument assemblies were randomly selected for this study. After 20 minutes of instrument warmup, each sensor was zeroed and subsequent pressure data were recorded for the number of indicated days.
RJC sensor zero remained at or near actual zero in 4 of 5 instruments. The remaining instrument drifted ~1 mmHg over 28 days. Changes in ambient pressure and temperature varied considerably and had no measurable effect on zero stability.
BLUE = Pressure Sensor Zero
GREEN = Change in Atmospheric Pressure (mmHg)
ORANGE = Change in Ambient Temperature (°C)
Uninstalled Sensors at 40°C
Zero stability over 25 days varied no more than 1 mmHg
Sensors in ICP Probe at 40°C
Data forthcoming
ICP Probe in 37°C Fluid
Data forthcoming
Reach out to discuss your needs and we’ll help you figure out what sensor will work best for you.