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Felix - Model SL300 -Ultrasonic Snow Depth Sensor
The SL300 ultrasonic snow depth sensor provides a total system in a compact package, containing an ultra sensitive electrostatic transducer and the supporting circuitry to provide a 0 to +5 or 0 to +2.5 VDC output with fully independent zero and span adjustments over the entire operating range of detection from 1.5’ - 20’. The piezoelectric crystal inside the transducer converts electrical pulses into sound energy that travels in the form of a wave at the established frequency and at a constant speed in a given medium.
The ultrasound waves are emitted in bursts and received back at the transducer as echoes. The instrument measures the time for the bursts to travel down to the reflecting surface and return. This time will be proportional to the distance from the transducer to the surface and can be used to determine the level of water or snow.
The speed of sound through the medium (air) varies with the medium’s temperature. SL300 contains a temperature sensor to compensate for changes in operating temperature that would alter the speed of sound and hence the distance calculation that determines an accurate level measurement.
The sensor is designed to work in the extreme conditions where the measurement of snow depth is likely to be required. The unit is mounted facing down to the ground before any snow falls to determine the sensor to ground height, then as snow falls the sensor measures the rise and fall in surface height.
Accurate measurement of snow depth has its limitations. However Felix Technology Snow depth sensor has overcome these shortcomings by using Hi-Tec electronics and intelligent algorithm.
- 50 KHz Electrostatic Transducer
- Compact Design
- Range: 1.5’ – 20.0’
- Can be Triggered Internally or Externally
- Analog Output: 0 to +2.5/5 VDC
- Excellent Receive Sensitivity
- Optional Digital output
- DIP Switch Range Settings for Quick and Easy Set-up
- Independent Settable Zero & Span
- Analog Output Temperature Compensated
- Accurate Snow Depth Measurement
- No Drift or Recalibration
- Distance Range: 0.45 - 6.10 m (1.5’ – 20.0’)
- Accuracy (over entire range): ± 0.1%
- Ultrasound Frequency: 50KHz
- Repetition Rate: 2.5 Hz
- Beam Angle: Typically 15° nominal
- Output Voltage: 0 to 2.5/5 VDC
- Output Current (maximum): 2 mA
- Output Digital: RS485/232
- Power Requirements: 8 to 24 VDC
- Max. Current: 80 mA (2A peak for .5ms)