Cảm biến đo mức siêu âm Campbell Scientific SR50AH-L

Thương hiệu: Campbell Scientific | Tình trạng: Còn hàng
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SR50AH-L Heated Sonic Ranging Sensor

Gọi 0904251826 để được trợ giúp

Cảm biến đo mức siêu âm Campbell Scientific SR50AH-L

Overview

The SR50AH heated sonic ranging sensor provides a non-contact method for determining snow or water 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. The SR50AH includes an integrated heater that prevents ice and rime from coating the transducer.

Note: Campbell Scientific recommends model SR50A-316SS-L for marine environments.

Benefits and Features

  • Non-contact method for determining snow or water depth

  • Wide operating temperature range

  • Integrated transducer heater; rugged enough for rime and ice environments

  • User-selectable options for output

  • Uses a multiple echo processing algorithm to help ensure measurement reliability

  • Compatible with most Campbell Scientific dataloggers

Detailed Description

The SR50AH was designed to meet the stringent requirements of measuring depths and uses a multiple echo processing algorithm to help ensure measurement reliability. The addition of a heating element around the transducer prevents ice and rime from coating the transducer with minimal power requirements.

SDI-12, RS-232, and RS-485 output options are available for measuring the SR50AH. Campbell Scientific’s MD485 interface can be used to connect one or more SR50AH 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.

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)

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.

Heater

  • Heater Resistance: 75 ohm 

  • Nominal Operating Voltage: 12 V (ac or dc)a

  • Maximum Rated Wattage: 3 W

  • Maximum Rated Voltage: 15 V (ac or dc)

  • Maximum Operating Temperature: 25°Cb

a - Use a properly conditioned low noise power source. A noisy power source will affect operation of the sensor. 

b - Turn the heater power off at temperatures above 25°C. This prevents damage to the sensor and reduces power consumption.

DOWNLOAD

Brochures

SR50A, SR50A-316SS, and SR50AH Sonic Ranging Sensors

Manuals

SR50A, SR50A-316SS, and SR50AH Sonic Ranging Sensors

SR50A, SR50A-316SS, and SR50AH Sonic Ranging Sensors - Example Programs (small ZIP file)

Compliance

SR50AH, SR50ATH, SR50A-316SS, and SR50AT-316SS EU Declaration of Conformity

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