Campbell Scientific

SR50A-L Sonic Ranging Sensor

ClimateMeteorological Station & Sensors

The SR50A Sonic Distance Sensor provides a non-contact method for determining snow depth. It determines depth by emitting an ultrasonic pulse and then measuring the elapsed time between the emission and return of the pulse. An air temperature measurement is required to correct for variations of the speed of sound in air.

Quantity

Overview

The SR50A Sonic Distance Sensor provides a non-contact method for determining snow depth.
It determines depth by emitting an ultrasonic pulse and then measuring the elapsed time between the emission and return of the pulse.
An air temperature measurement is required to correct for variations of the speed of sound in air.
Wide operating temperature range
User-selectable options for output
Rugged enough for harsh environments
Uses a multiple echo processing algorithm to help ensure measurement reliability
Compatible with most Campbell Scientific data loggers

Specification

Measurement Description	Snow depth
Measurement Time	< 1.0 s
Measurement Range	0.5 to 10 m (1.6 to 32.8 ft)
Output Options	SDI-12 version 1.3, RS-232, RS-485 (output options selected by configuring internal jumpers)
Baud Rates	1200 to 38400 bps (RS-232, RS-485 modes)
Resolution	0.25 mm (0.01 in.)
Accuracy	±1 cm (0.4 in.) or 0.4% of distance to target (whichever is greatest). Requires external temperature compensation.
Operating Temperature Range	-45° to +50°C