Turbidity Sensors / ClariVue 20
ClariVue 20 ISO 7027-Compliant, Side-Scatter Turbidity Sensor
Titanium Housing for Harsh Environments
Offering analog, Modbus, and SDI-12 communications
weather applications water applications energy applications gas flux and turbulence applications infrastructure applications soil applications

Overview

The ClariVue™20 is an ISO 7027-compliant, submersible, 90-degree, side-scatter turbidity sensor in a rugged titanium housing, making it the ideal choice for highly corrosive environments. The side-scatter turbidity measurement can be used as a surrogate for suspended sediment concentration (SSC) in aquatic ecosystems. The sensor returns data via SDI-12, analog, or Modbus to a data logger or controller for easy integration into your new or existing system.

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Benefits and Features

  • Accurate measurement of suspended solids and turbidity to the industry standard 4000 FNUs
  • Field-proven performance and reliability in a compact, low-power probe
  • Compatible with modern Campbell Scientific data loggers and third-party systems
  • Titanium housing for long-term deployment in the harshest of environments
  • Wet-mateable connector allows for flexible installation without the worry of water ingress

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Detailed Description

The ClariVue 20 is designed to operate in fresh and saline environments. The sensor face is made from titanium to slow biological growth over the optical windows; however, the sensor requires regular maintenance to keep the optical window clean in high bio-fouling environments. 

Caution: The ClariVue 20 may become damaged if it is encased in frozen liquid.

Specifications

Standards Meets ISO 7027-1:2016 (side scatter) standard for turbidity measurements
Signal Type SDI-12 v1.4, Modbus through RS-485, or analog
Operating Temperature Range -2° to +40°C (28° to 104°F)
Analog Signal Output 0 to 1 Vdc
Power Requirements 9.6 to 18 Vdc
Measurement Range 0 to 4000 FNU
SDI-12 Measurement Response Time 12 to 28 s depending on the SDI-12 command
(Refer to the manual for more information.)
Resolution 0.2 FNU
Particle Size 0.1 to 0.5 μm
Accuracy ±2% or 0.5 FNU, whichever is greater
Housing Material Titanium
Head Material Titanium
Optics Sapphire lens
Connector Description MCBH-5-FS, titanium, six gold-plated pins, wet-mateable
Cable Type Six-conductor, polyurethane jacket with water block
Optical Assembly Sealed with double O-rings
Internal Temperature Measurement ±0.2°C (±0.4°F) accuracy
Maximum Depth 500 m (1,640 ft)
Sensor Diameter 3.0 cm (1.2 in.)
Sensor Length 16.6 cm (6.5 in.)
Sensor Weight 200 g (0.44 lb)

Power Consumption

Initial Measurement 32 mA (30 s)
Idle 0.75 mA
Measurement 32 mA

Downloads

ClariVue 20 Program Examples v.1 (3 KB) 20-11-2024

Three programs are included for the ClariVue 20 submersible turbidity sensor. One program uses the M1! SDI-12 command to make measurements and calculate turbidity statistics (median, mean, standard deviation, minimum, maximum) and mean temperature. A second program uses an analog differential voltage measurement to read the ClariVue 20. Because the analog output requires the sensor to continuously measure turbidity and power the DAC, the sensor will not go to a low power state while in this mode. Subsequently, the current draw is significantly higher with analog out than with the digital protocols. A third program uses Modbus to communicate with the sensor.  When using Modbus, the ClariVue 20 can go into low power mode between measurements, which may require sending a command to wake the sensor before making another measurement. These programs were written for a CR1000Xe, but other dataloggers are programmed similarly. Voltage ranges, channel numbers, or other parameters may need to be changed to reflect the specifications of the datalogger.