The SR50A Snow Depth Measurement Sensor is a rugged acoustic sensor for measuring the distance from the sensor to a target. This sensor typically used for snow depth or water depth measurement, but it is well-suited for other uses.
Because the speed of sound in air varies with temperature, an independent temperature measurement is required to compensate the distance reading. A simple calculation is applied to initial readings for this purpose.
Note: We recommend model SR50A-316SS for marine environments.
Read MoreMeasurement Time | < 1.0 s |
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) |
Power Requirements | 9 to 18 Vdc (typically powered by datalogger’s 12 Vdc power supply) |
Measurement Range | 0.5 to 10 m (1.6 to 32.8 ft) |
Beam Acceptance | ~30° |
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 |
Compliance | CE Compliant |
Length | 10.1 cm (4.0 in.) |
Diameter | 7.5 cm (3 in.) |
Cable Weight | 250 g (8.2 oz) for a 4.57-m (15-ft) cable |
Weight |
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Warranty | 2 Years |
Maximum Cable Length |
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-NOTE- | Cable lengths greater than 60 m require a heavier gage wire if the power supply drops below 11 Vdc. |
SDI-12 | 60 m (196.9 ft) |
RS-232 | 30 m (98.4 ft) Baud rates ≤ 9600 bps |
RS-485 | 300 m (984.3 ft) |
Power Consumption |
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Active | 250 mA (typical) |
Quiescent SDI-12 Mode | < 1.0 mA |
Quiescent RS-232/RS-485 Modes |
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Please note: The following shows notable compatibility information. It is not a comprehensive list of all compatible products.
Compatible | Note | |
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21X (retired) | SDI-12 and RS-232. For RS-485, requires an MD485 interface or similar RS-485 to RS-232 interface. | |
CR10 (retired) | SDI-12 and RS-232. For RS-485, requires an MD485 interface or similar RS-485 to RS-232 interface. | |
CR1000 | SDI-12 and RS-232. For RS-485, requires an MD485 interface or similar RS-485 to RS-232 interface. | |
CR10X (retired) | SDI-12 and RS-232. For RS-485, requires an MD485 interface or similar RS-485 to RS-232 interface. | |
CR200X (retired) | SDI-12 | |
CR206X (retired) | SDI-12 | |
CR23X (retired) | SDI-12 and RS-232. For RS-485, requires an MD485 interface or similar RS-485 to RS-232 interface. | |
CR295X (retired) | SDI-12 | |
CR300 | SDI-12 and RS-232. For RS-485, requires an MD485 interface or similar RS-485 to RS-232 interface. | |
CR3000 | SDI-12 and RS-232. For RS-485, requires an MD485 interface or similar RS-485 to RS-232 interface. | |
CR310 | SDI-12 and RS-232. For RS-485, requires an MD485 interface or similar RS-485 to RS-232 interface. | |
CR500 (retired) | SDI-12 | |
CR5000 (retired) | SDI-12 and RS-232. For RS-485, requires an MD485 interface or similar RS-485 to RS-232 interface. | |
CR510 (retired) | SDI-12 and RS-232. For RS-485, requires an MD485 interface or similar RS-485 to RS-232 interface. | |
CR6 | SDI-12, RS-232, and RS-485 | |
CR800 | SDI-12 and RS-232. For RS-485, requires an MD485 interface or similar RS-485 to RS-232 interface. | |
CR850 | SDI-12 and RS-232. For RS-485, requires an MD485 interface or similar RS-485 to RS-232 interface. | |
CR9000 (retired) | ||
CR9000X | SDI-12 and RS-232. For RS-485, requires an MD485 interface or similar RS-485 to RS-232 interface. |
To achieve an unobstructed view for the SR50A's beam, the SR50A is typically mounted to a tripod mast, tower leg, or user-supplied pole via the SR50ATRIM or SR50ATOM crossarm mounting kits.
The SR50A requires the use of the SR50ACBL-L for communications and power.
One single-ended channel per probe is required; an excitation channel can be shared by several probes.
CR200(X) Series | CR800/CR850 | CR1000 | CR3000 | CR9000X | CR300 Series | CR6 |
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CR500 | CR510 | CR10 | CR10X | 21X | CR23X | CR9000 | CR5000 | CR7X |
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CR200(X) Series | CR800/CR850 | CR1000 | CR3000 | CR9000X | CR300 Series | CR6 |
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CR500 | CR510 | CR10 | CR10X | 21X | CR23X | CR9000 | CR5000 | CR7X |
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CR200(X) Series | CR800/CR850 | CR1000 | CR3000 | CR9000X | CR300 Series | CR6 |
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CR500 | CR510 | CR10 | CR10X | 21X | CR23X | CR9000 | CR5000 | CR7X |
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*Requires an MD485 interface or similar RS-485 to RS-232 interface.
Number of FAQs related to SR50A: 3
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Not every sensor has different cable termination options. The options available for a particular sensor can be checked by looking in two places in the Ordering information area of the sensor product page:
If a sensor is offered in an –ET, –ETM, –LC, –LQ, or –QD version, that option’s availability is reflected in the sensor model number. For example, the 034B is offered as the 034B-ET, 034B-ETM, 034B-LC, 034B-LQ, and 034B-QD.
All of the other cable termination options, if available, are listed on the Ordering information area of the sensor product page under “Cable Termination Options.” For example, the 034B-L Wind Set is offered with the –CWS, –PT, and –PW options, as shown in the Ordering information area of the 034B-L product page.
Note: As newer products are added to our inventory, typically, we will list multiple cable termination options under a single sensor model rather than creating multiple model numbers. For example, the HC2S3-L has a –C cable termination option for connecting it to a CS110 instead of offering an HC2S3-LC model.
Most Campbell Scientific sensors are available as an –L, which indicates a user-specified cable length. If a sensor is listed as an –LX model (where “X” is some other character), that sensor’s cable has a user-specified length, but it terminates with a specific connector for a unique system:
If a sensor does not have an –L or other –LX designation after the main model number, the sensor has a set cable length. The cable length is listed at the end of the Description field in the product’s Ordering information. For example, the 034B-ET model has a description of “Met One Wind Set for ET Station, 67 inch Cable.” Products with a set cable length terminate, as a default, with pigtails.
If a cable terminates with a special connector for a unique system, the end of the model number designates which system. For example, the 034B-ET model designates the sensor as a 034B for an ET107 system.
Many Campbell Scientific sensors are available with different cable termination options. These options include the following:
Note: The availability of cable termination options varies by sensor. For example, sensors may have none, two, or several options to choose from. If a desired option is not listed for a specific sensor, contact Campbell Scientific for assistance.