Specifications

Specifications are subject to change without notice.

Power Supply Voltage: 5 - 32 VDC1 This rating applies to units with S/N M00841 and later. Earlier TSM Sensors required 9 - 32 VDC.

Power: 400 mW

Operating Environment:

Altitude: Up to 5000 meters

Temperature: -20 to 72 °C

Relative Humidity: 0 to 100% (non-condensing). System may require reset if condensation accumulates within enclosure.

The 550USB is not rated for outdoor use.

Transient Overvoltage: Category I

Temporary Overvoltage: 40 Volts

Pollution Tolerance: Level 3 (enclosure must be intact and humidity vent in good condition)

Sampling Frequency: 40 Hz maximum

Ultrasonic Frequency: 60 kHz ±5 kHz

Weight:

LI-550F: 50 grams

LI-550P: 67 grams

Size:

LI-550F: 91.9 × 91.9 × 53.6 mm

LI-550P: 80 × 80 × 73.3 mm

Digital Outputs:

LI-550F: RS-232

LI-550P: RS-232, RS-422, UART-3V

Output Rate: 1 Hz, 2 Hz, 5 Hz, 10 Hz, 20 Hz, or 40 Hz

Wind Speed Measurements:

Range: 0-50 m/s

Resolution: 0.01 m/s

Accuracy (0-10 m/s): ±0.2 m/s

Accuracy (11-30 m/s): ±2%

Accuracy (31-50 m/s): ±4%

Wind Direction Measurements:

Resolution (u/v/w): 1.0°

Range (u/v): 0 to 359°

Accuracy (u/v): ±1.0°

Range (w): ±15° from the horizontal plane of the instrument

Accuracy (w): ±2°

Internal Humidity Sensor:

Range: 0 to 100% RH

Resolution: 0.01%

Internal Pressure Sensor:

Range: 50 to 115 kPa

Resolution: 0.01 kPa

Accuracy: ±1.0 kPa

Ultrasonic Temperature Measurements:

Range: -20 °C to 72 °C

Resolution: 0.01 °C

Accuracy: ±2.0 °C

Magnetometer:

Range (u, v, w): ±50 Gauss

Accelerometer:

Range (u, v, w): ±2 g

Tilt (pitch, roll): ±180°