TPS-206 Water Transparency Sensor

Particles, algae and coloured substances can change how light is absorbed and scattered in water. The TPS-206 uses an optical reading and a configured relationship to estimate transparency. A length-unit output does not itself establish that the sensor reproduces a Secchi-disk observation.

Define a meaningful transparency result

• Specify the reporting method and reference. If Secchi depth is required, compare paired field observations under a documented procedure and assess whether the sensor relationship is valid for that site.
• Keep transparency in mm distinct from turbidity in NTU/FNU and suspended solids in mg/L. There is no universal conversion that makes these different measurands interchangeable.
• Transparency can support assessment of visibly degraded water, but it does not independently measure odour, dissolved oxygen, pathogens or all pollutants. Combine it with the other measurements required for the monitoring objective.

Deploy, clean and verify

• Choose a representative depth and mounting position. Confirm optical clearance, flow, materials, supply and immersion limits for the actual assembly; avoid bubbles, window deposits and obstruction of the optical path.
• The listed cleaning brush assists with deposits and biological fouling. Inspect the windows and brush, perform the specified cleaning and verify against a suitable reference. The sensor is not maintenance-free.
• Recheck the relationship when colour, algal population or particle characteristics change. Record the reference method, calibration settings, cleaning and verification results.
• The listed RS485 Modbus RTU interface requires confirmed wiring, register units and receiving-device settings. Confirm the meaning of the original error and temperature specifications for the supplied version.