Water Pressure (level) Sensors Comparison Matrix
Stevens offers an extensive line of electronic liquid level sensors suitable for almost all environmental conditions and environments. Pressure sensors preform liquid level measurement by having the sensor submerged at a fixed level under the water surface. The pressure sensor measures the equivalent hydrostatic pressure of the water above the senor diaphragm, using this to calculate the total liquid depth. This function of a pressure sensor can be compared to “weighing the water”. Pressure sensors are ideal for ground and surface water level applications.
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| Accuracy | Operating Temperatures | Ranges | Input | Output Signal |
Body Material | Dimensions L x D |
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Stevens SDX | 0.25% (FS) | -40 to 85 C | 0-10, 0-35, 0-50 ft | 12 -35 VDC | 4 20 mA | EPDM Rubber housing | 3.0 x 0.81 in. |
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Greenspan PS 2100 |
0.05% (FS) | 0 to 50 C | 0 655/ft | 9 30 VDC | RS 232 | Stainless Steel | 15 x 0.88 in. |
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Greenspan PS 7000 |
0.1% (FS) | -5 to 60 C | 0 655/ft | 8 30 VDC | 4 20 mA | Stainless Steel | 6.23 x 0.87 in. |
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Greenspan PS 3000 |
0.05% (FS) | 0 to 50 C | 0 655/ft | 9 30 VDC | RS 232/SDI-12 | Stainless Steel or Delrin | 13.97 x 1.85 in. |
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Stevens SDT-II | 0.25% (FS) | 0 to 50 C | 0 100/ft | 12.5 35 VDC | 4 20 mA | PVC | 8.0 x 1.27 in. |





