top of page

TW-4731A/B OIW PAH Sensor (LR/HR)

What's In The Box

  • TW-4731A/B Oil in Water Sensor

  • 10m Cable (default), Customisable

  • User Manual

  • Delivery Inspection Report

Applications

Environmental Monitoring:
Ideal for monitoring oil pollution in natural water bodies, helping to protect ecosystems and comply with environmental regulations

Analytical Chemistry:
Used in chemical analysis laboratories to detect and quantify oil concentrations in water samples

Limnological Studies:
Supports limnological research by providing accurate data on oil contamination in freshwater ecosystems

Oceanographic Biology:
Assists in studying marine environments by monitoring oil levels, which is crucial for understanding the impact of pollution on marine life

Water Quality Sensors

edt (1).png
edt (2).png

TW-4731A/B OIW PAH Sensor (LR/HR)

Model number：TW-4731A (LR) & TW-4731B (HR)
Power：0.25W(non-wiping), 0.8W (wiping)
Dimension：TW-4731A: Φ50mm*176.3mm, TW-4731B: Φ50mm*181.3mm
Customise：OEM, ODM

Product description:
TracWater TW-4731A/B OIW PAH Sensors adopts the ultraviolet fluorescence principle. With self-cleaning brush to eliminate air bubbles, oil products, and reduce the interference of contamination to the measurement.

Overview

TracWater TW-4731A/B OIW PAH Sensor. This fluorescence-based method provides superior efficiency, speed, and repeatability compared to several traditional techniques, enabling real-time online monitoring. Equipped with a self-cleaning brush, the sensor effectively eliminates bubbles and oil residues, minimising contamination interference and extending the maintenance interval. This ensures outstanding stability during prolonged online use, allowing the sensor to monitor and alert users to oil pollution in water.

Features

  • Digital sensor with RS-485 output and standard MODBUS protocol.

​

  • Online measurement of polycyclic aromatic hydrocarbons (oils) content in water using ultraviolet fluorescence technology, offering high sensitivity.

​

  • Features an imported high-precision UV LED light source with high stability, minimal drift, and long service life.

​

  • Includes a self-cleaning brush to prevent microbial attachment, ensuring a longer maintenance cycle.

​

  • All calibration data is stored directly in the sensor, enabling seamless on-site installation and immediate use.

Specifications

Name

PAH Sensor (low range)

PAH Sensor (high range)

Model

TW-4731A

TW-4731B

Measuring principle

Ultraviolet fluorescence method

Ultraviolet fluorescence method

Range

0-1100ppb (BTEX), 0-1000ppb (PAH)

0-60ppm (BTEX), 0-100%RFU

Linearity

R²＞0.999

R²＞0.999

Resolution

0.01ppm

0.01ppm

Temperature range

0-50℃

0-50℃

Maximum water depth

30m

30m

IP range

IP68

IP68

Interface

RS-485, MODBUS protocol

RS-485, MODBUS protocol

Power supply

0.2W (non-wiping), 0.6W (wiping), DC;12-24V DC

0.2W (non-wiping), 0.6W (wiping), DC;12-24V DC

Size

Φ50mm*176.3mm

Φ50mm*181.3mm

Cable length

10 m (default), customisable

10 m (default), customisable

Calibration

0-point or 1-point or 2-point calibration

0-point or 1-point or 2-point calibration

​Sensor housing material

316L(Ti)

316L(Ti)

bottom of page