 7881 T Series Digital Air Pressure Transducer
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Frequency output |
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High accuracy |
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Exceptional low-drift characteristics |
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Robust |
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Calibration traceable to NPL and NIST |
The primary use of this pressure transducer series is to sense absolute air pressure as an integral part of Air Data Computers and Full Authority Digital Engine Controls and in other avionics systems where the device’s frequency output, high accuracy, robustness and exceptional low drift characteristics are essential to system performance.
The design of this particular transducer makes it an ideal choice for use within Air Data Test Sets where the high accuracy and repeatability, of this transducer, is essential to measurement and control of air pressures.
Details
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| Accuracy |
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| Linearity |
<0.010% FSP |
| Repeatability |
<0.001% FSP |
| Pressure hysteresis |
<0.001% FSP |
| Temperature hysteresis |
<0.010% FSP |
| Stability(drift per year) |
max. 0.010% FSP;
typical 0.005% FSP |
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| Environmental (to MIL-STD-810E) |
| Standard |
-55°C to +125°C |
| Vibration |
0.2g∑/Hz |
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5 - 2000Hz |
| Acoustic noise |
140dB |
| Acceleration |
20g |
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| Input requirements |
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| Voltage |
+15/0/-15VDC ±1V stabilized |
| Power |
<500mW max |
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| Output signal |
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| Frequency |
0-5V TTL square wave |
| Temperature compensation |
0.35 to 0.80VDC |
Over Pressure Capability
| Model |
FSP Nominal (kPa) |
Non-Derangement
Pressure (kPa) |
Non-Destructive
Pressure (kPa) |
| 7881 1T |
130 |
400 |
650 |
| 7881 2T |
262 |
800 |
1300 |
| 7881 3T |
345 |
1050 |
1750 |
| 7881 6T |
1000 |
3000 |
5000 |
| 7881 8T |
5000 |
10000 |
15000 |
Model Range
| Model |
Calibrated Pressure
Range (kPa) |
Frequency (kHz)* |
| 7881 1T |
3.5 to 131 |
8.8 |
| 7881 2T |
3.5 to 262 |
11.0 |
| 7881 3T |
3.5 to 345 |
11.5 |
| 7881 6T |
10 to 1050 |
15.5 |
| 7881 8T |
34 to 5170 |
23.0 |
* Quoted at vacuum; increases by approximately 20% at FSP
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