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The SM550 and SM1500 are two MEMS type, three-component acceleration sensors. Both have wide frequency response. The SM1500 model provides response from DC to 750Hz, while the SM550 model provides response DC to 50Hz. Many output rages are available for both models like +/-2g, +/-4g, +/-5g, +/-6g, +/-10g, +/-12g, are. Default sensitivity is 2.4V/g for the SM1500, and 1.2V/g for the SM550.
The SM1500 and SM550 accelerometers technology is based on a variable capacitor transducer and a feedback circuit that operates in a closed-loop configuration. The feedback force is controlled by an application-specific integrated circuit (ASIC) which provides high reliability and low output noise.
The SM1500 and SM550 sensors operates from a 12Vdc power supply that can range from 9Vdc to 18Vdc. The typical power consumption is 33mA. Acceleration output is differential analog, swinging between +/-5V. Other output voltages are avialable.
4-20mA current loop output is also available for both sensors
Characteristics:
| GENERAL | SM1500 | SM550 |
| Number of channels | 3 | 3 |
| Orientation | Vertical, NorthSouth, East-West | Vertical, NorthSouth, East-West |
| Power | MEMS - Variable capacitor transduce and feedback circui with close-loop configuration. | MEMS - Variable capacitor transduce and feedback circui with close-loop configuration. |
| Bias Level | 0V +\-100mV | 0V +\-100mV |
| FEATURES | ||
| Range | +/- 2g +/- 5g +/- 10g | +/- 2g +/- 6g +/- 12g |
| Sensitivity | 2.7 V/g | 1.2 V/g |
| Noise | 6ug rms/sqrt(Hz) | 60ug rms/sqrt(Hz) |
| Bandwidth | DC – 750Hz | DC – 50Hz |
| PHYSICAL | ||
| Size | 160 X 100 mm | 160 X 100 mm |
| Weight | 0.8kg | 0.8kg |
| Mounting | Floor or wall mounting | Floor or wall mounting |
| ENVIRONMENT | ||
| Temperature range | -20 to +70°C | -20 to +70°C |
| Humidity | 100% IP67 | 100% IP67 |