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. The result is a pressure sensor that offers the ultimate in high accuracy, while preserving the fast response and smooth output inherent to silicon sensors.

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.

Specifications

Output Ranges:
4 to 20 mA, 0 to 5 V or 0 to 10V

Power:
7 to 45 VDC (4-20 mA output)
7 to 45 VDC or 7 to 32 VAC (0-5 VDC output)
13 to 45 VDC or 13 to 32 VAC (0-10 VDC output)

Power Consumption:
4.9 mA max DC at 0-5 VDC or 0-10 VDC Output
0.12 VA max AC at 0-5 VDC or 0-10 VDC Output
20 mA max, DC only at 4-20 mA Output

Pressure Ranges:
Inches W.C.:
Low Range Unidirectional
0 to 0.10”, 0 to 0.25”, 0 to 0.50”, 0 to 0.75”, 0 to 1.00”
Low Range Bi-directional
±0.10”, ±0.25”, ±0.50”, ±0.75”, ±1.00”
Standard Range Unidirectional
0 to 1.00”, 0 to 2.00”, 0 to 2.50”, 0 to 3.00”, 0 to 5.00”
Standard Range Bi-directional
±1.00”, ±2.00”, ±2.50”, ±3.00”, ±5.00”
High Range Unidirectional
0 to 5”, 0 to 10”, 0 to 15”, 0 to 25”, 0 to 30”

Pascals:
Low Range Unidirectional
0 to 30, 0 to 50, 0 to 100, 0 to 175, 0 to 250
Low Range Bi-directional
±30, ±50, ±100, ±175, ±250
Standard Range Unidirectional
0 to 250, 0 to 300, 0 to 500, 0 to 1,000, 0 to 1,250
Standard Range Bi-directional
±250, ±300, ±500, ±1,000, ±1.250
High Range Unidirectional
0 to 1,250, 0 to 2,500, 0 to 4,000, 0 to 6,000, 0 to 7,400

Accuracy at 72°F (22.2°C)
Low Range:
±0.5% of W.C. ranges 0 to 0.1”, 0 to 0.25”, ±0.1” and ±0.25”
±0.5% of Pa ranges 0 to 30, 0 to 50, ±30 and ±50 Pa
±0.25% of range all other ranges

Standard and High Range:
±0.25% of range

Temperature Limits:
Storage: -40°F to 203°F (-40°C to 95°C)
Operational: 32°F to 140°F (0°C to 95°C)
Compensated: 50°F to 104°F (10°C to 40°C)

Operating RH Range:
0 to 95% non-condensing

Media:
Non-Ionic, Non-Corrosive, Clean, Dry Gasses

Pressure Range 0 to 0.10″ W.C.

Pressure Range 0 to 0.25″ W.C.

Pressure Range 0 to 0.50″ W.C.

Pressure Range 0 to 0.75″ W.C.

Pressure Range 0 to 1.00″ W.C.

Pressure Range 0 to 2.00″ W.C.

Pressure Range 0 to 2.50″ W.C.

Pressure Range 0 to 3.00″ W.C.

Pressure Range 0 to 5.00″ W.C.

Pressure Range 0 to 10″ W.C.

Pressure Range 0 to 25″ W.C.

Pressure Range -0.10 to 0.10″ W.C.

Pressure Range -0.25 to 0.25″ W.C.

Pressure Range -0.50 to 0.50″ W.C.

Pressure Range -0.75 to 0.75″ W.C.

Pressure Range -1.00 to 1.00″ W.C.

Pressure Range -2.00 to 2.00″ W.C.

Pressure Range -2.50 to 2.50″ W.C.

Pressure Range -3.00 to 3.00″ W.C.

Pressure Range -5.00 to 5.00″ W.C.

Pressure Range 0 to 15″ W.C.

Pressure Range 0 to 30″ W.C.