Monnit Vibration Meters use an accelerometer to measure g-force on 3 axes and then determines speed and frequency from this measurement. The sensor measures vibration once every Measurement Interval, which can be set as low as 1 minute and as high the Heartbeat Interval. The sensor is designed to measure continuous vibration and be low powered so it captures vibration for less than a second during its Measurement Interval. The sensor uses a Sensitivity Threshold to filter noise or low level vibrations. If this threshold is set to 0 then any vibration captured during the Measurement Interval will contribute to the duty cycle and will be analyzed, even very low level vibrations. The Vibration Meter will also report the duty cycle, or how long the sensor was measuring vibrations throughout the heartbeat.
The standard version of this sensor is powered by two replaceable 1.5 V AA sized batteries (included with purchase). This sensor is also available with a line power option. The line powered version of this sensor has a barrel power connector allowing it to be powered by a standard 3.0 - 3.6 V power supply (Included with Line Power option upgrade). The line powered version also uses two standard 1.5 V AA batteries as backup for uninterrupted operation in the event of line power outage.
Power options must be selected at time of purchase, as the internal hardware of the sensor must be changed to support the selected power requirements.
* Actual range may vary depending on environment.
** Battery life is determined by sensor reporting frequency and other variables.
Accelerometer Specifications |
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| Speed Measurement Range | 0 to 25.5 mm/s |
| Speed Measurement Resolution | 0.1 mm/s |
| Frequency Measurement Range | 0 to 256 Hz |
| Frequency Measurement Resolution | 1.5625 Hz rounded down to nearest 1 Hz |
| Vibration Intensity Threshold Range | 0 to 1.701 g |
| Vibration Intensity Threshold Resolution | 0.063 g |
| Weight | 3.7 oz. |
AA Specifications |
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| Battery Type | 2 Replaceable AA 1.5 V Batteries |
| Dimension | 4.375 in x 2.470 in x 1.12 in |
| Sensing Element | 2.0 - 3.6 V (2 x AA 1.5V Batteries or Optional Power Supply) |
| Device Range | 250 - 300 ft. non-line-of-sight device range* |
| Battery Life | At 1 hour heartbeat setting, included AA batteries will typically last 3-4 Years. ** |
| Max Operating Temperature Using AA Alkaline | -18°C to 55°C (0°F to 130°F) |
| Max Operating Temperature Using AA Lithium | -40°C to 60°C (-40°F to 140°F) |
| Optimal Battery Operating Temperature | +10°C to +50°C (+50°F to +122°F) |
| Enclosure Material | ABS |
900 MHz Specifications |
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| Operating Frequency | 900 MHz Operating Frequency |
| Certifications | Complies with Part 15 of the FCC Rules. (FCC ID: ZTL-RFSC1) Complies with Industry Canada standards. (IC: 9794A-RFSC1) |
