SR50A-316SS-L Stainless-Steel Sonic Ranging Sensor for Marine Environments
Marine Rugged
Corrosion-resistant chassis and transducer
weather applications water applications energy applications gas flux & turbulence applications infrastructure applications soil applications

Overview

The SR50A-316SS is a stainless-steel version of Campbell Scientific's acoustic sensor for measuring the distance from the sensor to a target. The stainless-steel chassis allows for operation in environments where corrosion is a concern (such as marine environments). It is typically used to measure snow or water depth, but it is well-suited for other uses.

This measurement can be used to determine snow or water depth. An air temperature measurement is required to correct for variations of the speed of sound in air. This sensor is compatible with most Campbell Scientific dataloggers.

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Benefits and Features

  • Non-contact method for determining snow or water depth
  • Wide operating temperature range
  • Designed for marine or corrosive environments
  • User-selectable options for output
  • Uses a multiple echo processing algorithm to help ensure measurement reliability
  • Compatible with most Campbell Scientific dataloggers

Images

An SR50A is shown. The SR50A and SR50A-316SS use the same chassis design and the same cabling.
An SR50A is shown. The SR50A and SR50A-316SS use the same chassis design and the same cabling.
An SR50A is shown. The SR50A and SR50A-316SS use the same chassis design and the same cabling.
Open-faced Parylene-coated transducer head used with the SR50A-316SS-L. Notice that no mesh grill is used in front of the transducer head.
SR50A-316SS-L mounted to a 19517 SR50A Mounting Kit (sold separately)
SR50A-L mounted to a 19517 SR50A Mounting Kit and crossarm (sold separately)
SR50A-L mounted to a 19484 SR50A Mounting Stem (sold separately)
SR50A-L mounted to a crossarm using 19484 SR50A Mounting Stem and 17953 1 x 1 inch Nu-Rail crossover fitting (sold separately)

Detailed Description

The SR50A-316SS was designed to meet the stringent requirements of measuring depths and uses a multiple echo processing algorithm to help ensure measurement reliability.

SDI-12, RS-232, and RS-485 output options are available for measuring the SR50A-316SS. Campbell Scientific’s MD485 interface can be used to connect one or more SR50A-316SS sensors in RS-485 mode to an RS-232 device. This can be useful for sensors that require lead lengths that exceed the limits of either RS-232 or SDI-12 communications. The SR50AH-L is available with a heater option for locations where rime ice is a problem.

The SR50A replaced the SR50 in March 2007. The newer SR50A is smaller and has different output options than its predecessor.

Specifications

  • Measurement Time: < 1.0 s
  • Output Options: SDI-12 version 1.3, RS-232, RS-485 (output options selected by configuring internal jumpers)
  • Baud Rates (RS-232, RS-485 modes): 1200 to 38400 bps
  • 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
  • Length: 10.1 cm (4.0 in)
  • Diameter: 7.5 cm (3 in)
  • 15-ft Cable Weight: 250 g (8.2 oz)
  • Weight without Cable: 795 g (28 oz)

Maximum Cable Length

  • SDI-12: 60 m (200 ft)
  • RS-232: 60 m (200 ft); baud rates ≤9600 bps
  • RS-485: 300 m (984 ft); cable lengths greater than 60 m require a heavier gage wire if the power supply drops below 11 Vdc.

Power Consumption

  • Typical Active: 250 mA
  • Quiescent SDI-12 Mode: < 1 mA
  • Quiescent RS-232/RS-485 Modes:
    < 1.25 mA (≤9600 bps),
    < 2.0 mA (>9600 bps)

Compatibility

Datalogger Considerations

One single-ended channel per probe is required; an excitation channel can be shared by several probes.

Compatible Contemporary Dataloggers (SDI-12)

CR200(X) Series CR800/CR850 CR1000 CR3000 CR9000X CR300 Series CR6

Compatible Retired Dataloggers (SDI-12)

CR500 CR510 CR10 CR10X 21X CR23X CR9000 CR5000 CR7X

Compatible Contemporary Dataloggers (RS-232)

CR200(X) Series CR800/CR850 CR1000 CR3000 CR9000X CR300 Series CR6

Compatible Retired Dataloggers (RS-232)

CR500 CR510 CR10 CR10X 21X CR23X CR9000 CR5000 CR7X

Compatible Contemporary Dataloggers (RS-485)

CR200(X) Series CR800/CR850 CR1000 CR3000 CR9000X CR300 Series CR6
* * * * *

Compatible Retired Dataloggers (RS-485)

CR500 CR510 CR10 CR10X 21X CR23X CR9000 CR5000 CR7X
*

*Requires an MD485 interface or similar RS-485 to RS-232 interface.


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