Turner Designs TD-4100XD Hydrocarbon In Water Analyzer Unit

Module Feature

TD-4100XD is Turner Designs (TDHI, now Benchmark Measurement Solutions) heavy-duty continuous online oil-in-water monitor, the rugged XD upgraded version of TD-4100 platformBenchmark .... It adopts ultraviolet fluorescence detection principle, specifically responds to aromatic hydrocarbon substances, and can detect crude oil, diesel, lubricating oil, hydraulic oil, BTEX and polycyclic aromatic hydrocarbons in water. The whole skid frame and wetted parts adopt 316 stainless steel, corrosion-resistant, suitable for marine, offshore platform, refinery and petrochemical harsh environment. It supports hazardous area certification, built-in non-contact EZ Access flow cell, less susceptible to interference from suspended solids and turbidity, low maintenance workload. It is widely used for produced water overboard discharge compliance monitoring, bilge water monitoring, heat exchanger leakage alarm and reinjection water quality control. There are derivative variants TD-4100XDC closed flow cell type and TD-4100XD GP general-purpose non-explosion-proof versionBenchmark ....

Working principle

UV excitation light irradiates the water sample flowing through the flow cell. When hydrocarbon oil components exist in the water, the oil molecules absorb ultraviolet energy and emit characteristic fluorescence. The photodetector captures the fluorescence signal, the internal circuit converts the signal into oil concentration value after calibration and turbidity compensation. The system outputs 4-20mA analog signal and relay alarm contact to DCS/PLC, realizing continuous online monitoring and over-limit alarm.

Onboard components

UV excitation lamp, fluorescence photodetector, non-contact flow cell, bubble trap assembly, 316SS sampling pipeline, pressure regulating valve, filter, signal processing circuit board, local display keypad, alarm relay module, skid frame.

LED indicators

Local display panel with LED alarm indicator, showing concentration, fault and calibration status.

Hardware self‑diagnosis

Self-diagnosis covers lamp aging, flow cell contamination, sample flow loss, detector signal abnormality and internal circuit fault. Fault codes are stored locally.

Programming software

Local keypad for calibration, alarm threshold setting; supporting dedicated configuration software for remote parameter check and log export.

Electrical & Process Parameters

Model:TD-4100XD Brand:Turner Designs (Benchmark Measurement Solutions) Device type:UV Fluorescence Oil-In-Water Online Analyzer Measurement range:ppb ~ ppm level Wetted material:316 stainless steel Measurement principle:UV induced fluorescence Sample medium:Produced water, bilge water, cooling condensate, oily wastewater Output:4-20mA, relay alarm contact Function:Continuous online hydrocarbon oil concentration monitoring and leakage detection

Mechanical & Structure

Mounting:Skid / wall mounting Protection:Explosion-proof option ATEX Zone II Housing:316 stainless steel skid assembly

Environmental

Operating temperature:-20℃ ~ +60℃ Storage temperature:-40℃ ~ +85℃ Ambient humidity:5~95% non‑condensing Certification:ATEX, marine industry specification compliant Status:Turner Designs original analytical instrument spare

Installation

Install skid on sampling pipeline according to flow direction. Connect sample inlet, drain and backpressure pipeline. Power on and wire 4-20mA signal cable to control system. Complete zero calibration and span calibration with CheckPOINT calibration standard before putting online. Regularly clean flow cell and replace UV lamp.

Interface

Sample inlet/outlet process port, 4-20mA signal terminal, relay alarm terminal, power supply terminal.

Diagnostic

Concentration reading drifting:Flow cell fouling, UV lamp attenuation, bubble entrainment in sample. No reading / low signal:Lamp failure, flow blockage, sample flow interrupt. False high alarm:Sediment attached to optical window, need cleaning.

Product Brief

Turner Designs TD-4100XD online oil-in-water monitor, UV fluorescence detection, 316SS skid structure, hazardous area optional, used for offshore produced water, bilge water and industrial circulating water hydrocarbon leakage and discharge monitoring.