This product is no longer available and has been replaced by: SR50A-L. Some accessories, replacement parts, or services may still be available.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


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.

The "-L" on a product model indicates that the cable length is specified at the time of order.



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)


Datalogger Considerations

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

Compatible Contemporary Dataloggers

CR200(X) Series CR800/CR850 CR1000 CR3000 CR9000X
* **

Compatible Retired Dataloggers

CR500 CR510 CR10 CR10X 21X CR23X CR9000 CR7X CR5000
*** ** ** **

*The CR200(X)-series is only compatible with the SDI-12 output.

**The CR7, CR9000(X), and 21X are compatible only with the pulse train output.

***The CR10 requires a special PROM to measure the SDI-12 output.

Case Studies

New Mexico: Weather Monitoring
Chevron Mining, Inc., (CMI) owned and operated a 6.6 million-metric-ton-per-year (6.6 million-U.S.-ton) molybdenum mining more
Alaska: Eddy Covariance
Scientists and land-use managers have long recognized the importance of forest lands for their more
Delaware: Environmental Observing System
The Delaware Environmental Observing System (DEOS) is a real-time system dedicated to monitoring environmental more