Amplified Very Low Pressure Sensors
Download datasheet (PDF)
Download dimensional drawing (PDF)
Features
- 0.25 and 0.50 In H2O Pressure Ranges
- Radiometric 4V Output
- Temperature Compensated
- Calibrated Zero and Span
Applications
General Description
The Amplified line of low pressure sensors is based upon a proprietary technology to reduce all output offset or common mode errors. This model provides a ratiometric 4-volt output with superior output offset characteristics. Output offset errors due to change in temperature, stability to warm-up, stability to long time period, and position sensitivity are all significantly reduced when compared to conventional
compensation methods. In addition the sensor utilizes a silicon, micromachined, stress concentration enhanced structure to provide a very linear output to measured pressure.
These calibrated and temperature compensated sensors give an accurate and stable output over a wide temperature range. This series is intended for use with non-corrosive, non-ionic working fluids such as air, dry gases and the like.
The output of the device is ratiometric to the supply voltage over a supply voltage range of 4.5 to 5.5 volts.
Pressure Sensor Characteristics Maximum Ratings
- Supply Voltage Vs: +4.5 to +5.5 Vdc
- Common-mode pressure: -10 to +10 psig
- Lead Temperature (soldering 2-4 sec.): 250°C
Environmental Specifications
Temperature Ranges
- Compensated: 5 to 50°C
- Operating: -25 to 85°C
- Storage: -40 to 125°C
- Humidity Limits: 0 to 95% RH (non-condensing)
Performance Characteristics for 0.25 INCH-D-4V
| Parameter, note 1 |
Minimum |
Nominal |
Maximum |
Units |
| Operating Range, differential pressure |
-- |
± 0.25 |
-- |
" H2O |
| Output Span, note 5 |
± 1.80 |
± 2.0 |
± 2.20 |
V |
| Offset Voltage @ zero differential pressure |
2.00 |
2.25 |
2.50 |
V |
| Offset Temperature Shift (5°C-50°C), note 2 |
-- |
-- |
± 50 |
mV |
| Offset Warm-up Shift, note 3 |
-- |
± 20 |
± 50 |
mV |
| Offset Position Sensitivity (±1g) |
-- |
± 40 |
± 100 |
mV |
| Offset Long Term Drift (one year) |
-- |
± 20 |
± 50 |
mV |
| Linearity, hysteresis error, note 4 |
-- |
0.05 |
0.25 |
%fs |
| Span Shift (5°C-50°C), note 2 |
-- |
-- |
± 4 |
%span |
Performance Characteristics for 0.5 INCH-G-4V
| Parameter, note 1 |
Minimum |
Nominal |
Maximum |
Units |
| Operating Range, gage pressure |
-- |
0.5 |
-- |
" H2O |
| Output Span, note 5 |
3.80 |
4.0 |
4.20 |
V |
| Offset Voltage @ zero gage pressure |
0.10 |
0.25 |
0.40 |
V |
| Offset Temperature Shift (5°C-50°C), note 2 |
-- |
-- |
± 50 |
mV |
| Offset Warm-up Shift, note 3 |
-- |
± 20 |
± 50 |
mV |
| Offset Position Sensitivity (±1g) |
-- |
± 40 |
± 100 |
mV |
| Offset Long Term Drift (one year) |
-- |
± 20 |
± 50 |
mV |
| Linearity, hysteresis error, note 4 |
-- |
0.05 |
0.25 |
%fs |
| Span Shift (5°C-50°C), note 2 |
-- |
-- |
± 4 |
%span |
Specification Notes
(1): All parameters are measured at 5.0 volt excitiation, for the nominal full scale pressure and room temperature unless otherwise specified. Pressure measurements are with positive pressure applied to port B.
(2): Shift is relative to 25°C.
(3): Shift is within the first hour of excitation applied to the device.
(4) Measured at one-half full scale rated pressure using best straight line curve fit.
(5): The voltage added to the offset voltage at full scale pressure. Nominally the output voltage range is 0.25 to 4.25 volts for minus to plus full scale pressure.
All Sensors reserves the right to make changes to any products herein. All Sensors does not assume any liability arising out of the application or use of any product or circuit described herein, neither does it convey any license under its patent rights nor the rights of others.
Download datasheet (PDF)
Download dimensional drawing (PDF)
|
