This product is no longer available and has been replaced by: SR50A. Some accessories, replacement parts, or services may still be available.
SR50-L Ultrasonic Distance Sensor
Services Available
Repair No
Calibration No
Free Support No


The SR50 measured elapsed time between emission and return of an ultrasonic pulse. An independent air temperature measurement was required. The SR50 output SDI-12, pulse train, or serial ASCII. Output options were configured with internal jumpers.



Power Requirements 9 to 16 Vdc
Measurement Time 0.6 s (typical)
Measurement Range 0.5 to 10 m (1.6 to 32.8 ft)
Accuracy ±1 cm (0.4 in.) or 0.4% of distance to target (whichever is greatest)
Operating Temperature -45° to +50°C
Diameter 7.5 cm (3 in.)
Length 31 cm (12.2 in.)
Weight 1.3 kg (2.9 lb)


Please note: The following shows notable compatibility information. It is not a comprehensive list of all compatible products.

Data Loggers

Compatible Note
21X (retired)
CR10 (retired)
CR1000 (retired)
CR10X (retired)
CR200X (retired)
CR206X (retired)
CR23X (retired)
CR295X (retired)
CR500 (retired)
CR5000 (retired)
CR510 (retired)
CR9000 (retired)
CR9000X (retired) The CR9000X is compatible only with the pulse train output.

Additional Compatibility Information

Data Logger Considerations

SDI-12 and pulse train output options are available for measuring the SR50.

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