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Turbidity Sensors

SX-CTNNA Series

The SensorsX SX-CTNNA Series Online Turbidity Sensor uses a 90° scattering method compliant with ISO 7027 for reliable turbidity measurement from 0.1 to 4,000 NTU. It features RS-485/Modbus communication, IP68 protection, and a titanium-alloy housing, making it suitable for continuous water-quality monitoring in industrial and environmental applications.

Measurement Principle: 90° Scattering Method
Measurement Range: 0.1–1,000 NTU or 0.1–4,000 NTU
Accuracy: ±5% or 0.3 NTU, whichever is greater
Output Signal: RS-485 / Modbus
Power Supply: DC 5–24 V, >50 mA
Ingress Protection: IP68
Maximum Pressure: 6 bar (87.0 psi)
Process Connection: M22×1.5; optional NPT 3/4 adapter; immersion mounting
Housing Material: Titanium Alloy
Operating Temperature: 0°C to +50°C (32°F to 122 °F)

$766.00

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Product Overview

The SX-CTNNA Series online turbidity sensor uses the 90° scattering method compliant with ISO 7027. A sapphire optical window with a customized optical filter provides stable measurement performance with resistance to ambient light interference and sample-color effects. Its compact design enables easy installation and maintenance, making it suitable for field water-quality monitoring applications.

Main Features

Digital sensor with RS-485 output, standard Modbus protocol
No electrolyte solution required; high resistance to interference; reduced recalibration requirements
90° scattered-light principle, compliant with the ISO 7027
international standard
Sapphire optical window with custom filter, resistant to

interference from ambient light and sample color
Built-in calibration parameters, factory-calibrated for quick
installation and commissioning

Product Application

Industries Served

Food & Beverage	Pharmaceutical	Power Generation
Metallurgy	Agriculture

Technical Data

Measurement
Product Type	Turbidity Sensor (Brushless)
Measurement Principle	90° scattering method
Measurement Range	0.1–1,000 NTU or 0.1–4,000 NTU
Accuracy & Calibration
Accuracy	±5% or 0.3 NTU (whichever is greater)
Calibration	0-point, 1-point, or 2-point calibration
Power & Communication
Supply Voltage	DC 5–24 V, >50 mA
Power Consumption	0.1 W
Digital Communication	RS-485 / Modbus
Environmental Conditions
Operating Temperature	0–50 °C (32–122 °F)
Maximum Pressure	6 bar (87.0 psi)
Ingress Protection	IP68
Mechanical & Materials
Mounting	M22×1.5; optional NPT 3/4 adapter; immersion mounting
Housing Material	Titanium Alloy
Dimensions	Φ22 mm × 175.5 mm (Φ0.87 in × 6.91 in)
Cable Length	10 m (32.8 ft) standard, customizable

Certifications & Compliance

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