Pressure Transmitters
Precision silicon sensors with digital compensation for ultimate accuracy
Pressure Sensor Description
The focal point of any sensor is the sensing element itself, and BAPI has gone to great lengths to produce one of the best sensors on the market today. The heart of every BAPI unit is a micromachined, single-crystal silicon, pressure sensor. Each sensor is fabricated using the same integrated circuit technology used to make millions of cell phones, game machines and personal computers. To control and maintain the quality of these sensors, BAPI is involved in all phases of production from design to use.
Silicon does bring with it one undesired trait —thermal sensitivity. The traditional method of compensating for this thermal sensitivity is an external circuit with discreet resistors, some of which have their own temperature dependencies, introducing more error. BAPI uses a different, unique approach. We employ a custom compensation ASIC (Application Specific Integrated Circuit) that uses digital compensation while maintaining an analog signal path, producing a sensor that is precise and interchangeable.
Because of the innovative sensor and digital temperature compensation circuit, we are able to produce a highly accurate and stable product. This accuracy is verified during final calibration at our factory using a pressure-controlled source accurate to 0.00015 inch of water and traceable to NIST standards.
High Accuracy
NIST-traceable accuracy of ±0.25% for most ranges
Digital Compensation
ASIC-based digital compensation eliminates thermal drift
Piezoresistive
Single-crystal silicon sensor fabricated with IC technology
Specifications
Output Ranges
4 to 20 mA, 0 to 5 V or 0 to 10V
Power
Power Consumption
Pressure Ranges
Inches W.C.
Pascals
Accuracy at 72°F (22.2°C)
Temperature Limits
Operating RH Range
0 to 95% non-condensing
Media
Non-Ionic, Non-Corrosive, Clean, Dry Gasses
Pressure Transmitter Output Tables
Inches Water Column (W.C.)
Pressure Range 0 to 0.10" Output Table
| W.C. | Pascals | 4 to 20mA | 0 to 5V | 0 to 10V |
|---|---|---|---|---|
| 0.000 | 0.00 | 4.00 | 0.00 | 0.00 |
| 0.002 | 0.50 | 4.32 | 0.10 | 0.20 |
| 0.008 | 1.99 | 5.28 | 0.40 | 0.80 |
| 0.012 | 2.99 | 5.92 | 0.60 | 1.20 |
| 0.016 | 3.99 | 6.56 | 0.80 | 1.60 |
| 0.020 | 4.98 | 7.20 | 1.00 | 2.00 |
| 0.024 | 5.98 | 7.84 | 1.20 | 2.40 |
| 0.028 | 6.97 | 8.48 | 1.40 | 2.80 |
| 0.032 | 7.97 | 9.12 | 1.60 | 3.20 |
| 0.036 | 8.97 | 9.76 | 1.80 | 3.60 |
| 0.040 | 9.96 | 10.40 | 2.00 | 4.00 |
| 0.044 | 10.96 | 11.04 | 2.20 | 4.40 |
| 0.048 | 11.96 | 11.68 | 2.40 | 4.80 |
| 0.052 | 12.95 | 12.32 | 2.60 | 5.20 |
| W.C. | Pascals | 4 to 20mA | 0 to 5V | 0 to 10V |
|---|---|---|---|---|
| 0.056 | 13.95 | 12.96 | 2.80 | 5.60 |
| 0.060 | 14.95 | 13.60 | 3.00 | 6.00 |
| 0.064 | 15.94 | 14.24 | 3.20 | 6.40 |
| 0.068 | 16.94 | 14.88 | 3.40 | 6.80 |
| 0.072 | 17.93 | 15.52 | 3.60 | 7.20 |
| 0.076 | 18.93 | 16.16 | 3.80 | 7.60 |
| 0.080 | 19.93 | 16.80 | 4.00 | 8.00 |
| 0.084 | 20.92 | 17.44 | 4.20 | 8.40 |
| 0.086 | 21.42 | 17.76 | 4.30 | 8.60 |
| 0.088 | 21.92 | 18.08 | 4.40 | 8.80 |
| 0.092 | 22.92 | 18.72 | 4.60 | 9.20 |
| 0.096 | 23.91 | 19.36 | 4.80 | 9.60 |
| 0.100 | 24.91 | 20.00 | 5.00 | 10.00 |
Using These Output Tables
Select your pressure range from the tabs above to view the corresponding output values. Each table shows the relationship between pressure measurement and the three available output types: 0-5 VDC, 0-10 VDC, and 4-20 mA. Use these tables to verify sensor operation or integrate BAPI pressure transmitters into your control system.
Need a Pressure Transmitter?
Our digital compensation technology provides the ultimate in accuracy and stability for pressure measurement.