The 40 mm, 8-pole Sensor Seal S1 is a low-cost wireless device optionally installed in Lorbrand rollers. It inlcludes temperature, vibration, and RPM sensors and is powered fully by rotation.
Temperature Sensor
The Sensor Seal S1 includes a temperature sensor to measure the temperature of the shaft and thus infer temperature of both bearings.
| Parameter | Value |
|---|---|
| Measureable range | -10°C to +100°C |
| Resolution | 0.1°C |
| Accuracy | ±1°C, T < 40°C |
Vibration Sensor (Accelerometer)
The Sensor Seal S1 inludes a triple-axis acceleromter to measure the vibration of the roller.
| Parameter | Value |
|---|---|
| Bandwidth | 800 Hz |
| Maximum acceleration | ±16 g (N/kg) |
| Transmitted quantity | mm/s^2 (RMS) |
| Update interval | 1000 ms |
On-device vibration analysis using machine learning is only available on Sensor Seal S2 or later.
RPM Sensor (Tachometer)
The Sensor Seal S1 includes a highly-accurate tachometer for measuring roller rpm which further expands use cases, such as replacing traditional speed sensors on weigh scales.
| Parameter | Value |
|---|---|
| Resolution | 0.1 rpm |
| Maximum measureable | 3750 rpm |
| Accuracy at 0.25 updates/second | ±0.025% |
| Accuracy at 0.5 updates/second | ±0.05% |
| Accuracy at 1 update/second | ±0.1% |
Operational RPM
The Sensor Seal S1 is powered completely by rotation and consumes a minimal amount of power.
| Parameter | Value |
|---|---|
| Mininum operational RPM | 270 rpm (250 rpm achievable with transmission rate limitations) |
| Maximum operational RPM | 1200 rpm |
| Mechanical power | < 50 mW (when less than 400 rpm) |
Sub-GHz Radio
The Sensor Seal S1 includes a sub-GHz transceiver and a built-in antenna for transmission of measurements. It also enables wireless firmware updates.
| Parameter | Value |
|---|---|
| Operational Frequency | 150 MHz to 960 MHz (configurable via wireless update) |
| Bandwidth | Typ. 200 kHz |
| Modulation | GFSK |
| Transmit Power | -11 to +14 dBm, +8 dBm typ. |
Measurement Transmission
The Sensor Seal S1 is typically configured to periodically transmit measurements at a fixed interval. It can also be configured to transmit measurements when a parameter reaches a certain threshold.
| Parameter | Value |
|---|---|
| Transmission interval | Configurable from 0.2 seconds to 24 hours |
The lowest achievable transmission interval will depend on the number of installed Sensor Seals and gateways. Contact us for more information.
Gateway Compatibility
The Sensor Seal S1 is compatible with the following gateways: