Techcross TCL4ECS TRO Sensor / Chlorine Analyzer – Electro-Cleen System (ECS) Ballast Water Treatment

Product Information

Manufacturer / Brand	Techcross (Electro-Cleen® System)
Model (as marked on front panel)	TCL4ECS
Product Type	Online TRO (Total Residual Oxidant) / Total Residual Chlorine Analyzer – TRO Sensor Unit (also called Chlorine Analyzer)
System	Techcross Electro-Cleen® System (ECS) Ballast Water Management System (BWMS)
Unit Label on Enclosure	CLX#1 / ADDR : 5 (sensor number 1, communication address 5)
Measurement Platform	Appears to be based on the HF scientific CLX online chlorine/TRO monitor platform (Not verified by a Techcross document)
Part Number	Not clearly visible in the supplied photograph
Serial Number	Not clearly visible in the supplied photograph
Power Rating	Not clearly visible in the supplied photograph
Country of Manufacture	Not clearly visible in the supplied photograph
Condition	Refurbished (subject to confirmation)
Supplier	SM MARINE SERVICE™, Chattogram, Bangladesh

Product Introduction

The Techcross TCL4ECS is the online TRO (Total Residual Oxidant) sensor analyzer, also known as a chlorine analyzer (Techcross chlorine analyzer / ballast water chlorine analyzer), used on ships fitted with the Techcross Electro-Cleen® System (ECS) electrolytic ballast water treatment system. It continuously samples treated ballast water and measures the oxidant concentration so the ECS controller can adjust electrolysis during ballasting and confirm safe neutralization during de-ballasting.

SM MARINE SERVICE™ (https://www.smmarineservice.com/) supplies Techcross ECS spare parts, including TRO sensor units, analyzer spares and related ballast water treatment equipment, to ship owners, ship managers and marine service companies worldwide.

What Is This Equipment?

The TCL4ECS is a wall-mounted colorimetric analyzer housed in a dark grey plastic enclosure with a hinged door. Through the front windows you can see the LCD display with an up / down / enter keypad, and the measurement section with the colorimeter cell (cuvette) holder and reagent bottles. The analyzer belongs to the TSU (TRO Sampling Unit) part of the Techcross ECS, which takes a sample from the ballast line and reports the TRO value to the ECS control system.

The yellow label "CLX#1 / ADDR : 5" shows that this unit was installed as analyzer No. 1 with communication address 5 on the ship's ECS network. Ships often have more than one TRO analyzer (for example one for ballasting and one for de-ballasting), each with its own address.

Main Features

• Online measurement of TRO / total residual chlorine in treated ballast water
• DPD colorimetric measuring principle (as used on the CLX platform)
• LCD display with three-button keypad (up, down, enter) for menu and calibration
• Built-in reagent compartment and sample cuvette behind a viewing window
• Analog and digital signal output to the ECS controller (address-based communication)
• Alarm relays for high/low concentration (on the CLX platform)
• Compact wall-mount enclosure with cable glands and sample inlet fitting
• Designed for continuous duty in the ship's ballast pump room or engine room

Techcross TCL4ECS chlorine analyzer / TRO sensor analyzer (Electro-Cleen® System) – supplied by SM MARINE SERVICE™

Main Technical Specifications

The values below are published specifications of the HF scientific CLX online chlorine/TRO monitor platform. They are given for reference only; confirm the exact figures against the Techcross TCL4ECS nameplate and manual.

Parameter	TRO / Total Residual Chlorine
Method	DPD colorimetric (USEPA accepted)
Range	0 – 10 mg/l (ppm)
Resolution	0.01 mg/l
Accuracy	±5% or ±0.03 mg/l (0–6 mg/l); ±10% (6–10 mg/l)
Cycle Time	User selectable, 110 seconds to 10 minutes
Outputs	4–20 mA, RS-485 Modbus
Alarms	2 relays, Form C, 240 VAC 2 A
Sample Pressure	5 – 150 psi
Power Supply	100 – 240 VAC, 47–63 Hz, auto-switching
Enclosure	ABS plastic, NEMA 4X / IP66
Operating Temperature	0 – 40 °C
Approx. Weight	3.6 kg (shipping)

Inside the Unit: PCBs, Modules & Part Numbers

Techcross does not publish a public parts list for the TCL4ECS boards, and no PCB numbers are visible in the supplied photograph. The modules below are the functional blocks of the CLX-type analyzer. Where a part number is given, it is the HF scientific catalog number for the CLX platform; part numbers for the internal PCBs are Not verified. Send us a photo of the board label for exact matching.

Main Controller / CPU Board

Controls the measuring cycle, valve and pump timing, signal processing, fault diagnostics and the 4–20 mA / RS-485 Modbus outputs. PCB number: Not verified.

Display & Keypad Board

LCD display with up / down / enter keys and status LED, used for readings, menus, calibration and fault messages. PCB number: Not verified.

Power Supply

Auto-switching 100–240 VAC supply for the analyzer electronics. HF scientific lists a power item with catalog number 20779S for the CLX (exact description Not verified).

Colorimeter / Optical Measuring Module

Light source and photodetector around the flow-through cuvette that read the DPD colour. Flow-through cuvette (CLX): 25018S. Tubing/cuvette kit: 09950 (CLX-XT2 version: 09950XT2).

Solenoid Valves & Reagent Pump

FLOW valve (sample in), PURGE valve (drains the cuvette) and a solenoid-driven reagent pump with four check valves. Check valve kit: 25017S; check valve flushing kit: 25096.

Sample Inlet & Strainer

Sample inlet fitting and T-strainer that protect the cuvette from particles. Replacement T-strainer screen: 28625 / 28625S. Low pressure adapter: 28316.

Reagents & Consumables

Total chlorine reagent set (30 days): 09952 / 09948; 12-month total chlorine kit: 09956. Free chlorine reagent set: 09951 / 09947; 12-month kit: 09955. Desiccant cartridge: 09944. Operating manual (CLX): 24420. Remote panel meter: 19609.

Main Components & Related Units

The TCL4ECS works together with the other units of the Techcross Electro-Cleen® System:

• CPC – Control PC / control panel (operator interface)
• PDE – Power distribution unit
• PRU – Power rectifier unit (supplies electrolysis current)
• ECU – Electro-chamber unit (electrolysis chamber)
• ESJ / EPJ – ECU signal and power junction boxes
• TSU – TRO sampling unit (where the TCL4ECS analyzer is used)
• ANU – Active neutralization unit (sodium thiosulfate dosing during discharge)
• FMU – listed among the ECS units (exact function Not verified)

Related HF scientific platform models: CLX (cat. 20040), CLX-XT, CLX-XT2 (cat. 28033), CLX-Ex / CLX-Ex2 (explosion-proof version).

Marine & Industrial Applications

• Ballast water treatment systems (Techcross Electro-Cleen® System)
• TRO control during ballasting (electrolysis feedback)
• TRO monitoring during de-ballasting and neutralization
• Bulk carriers, tankers, container ships, LNG/LPG carriers and offshore vessels
• Seawater chlorination and cooling water monitoring

Close-up of the TCL4ECS front label, LCD display, keypad and measuring cuvette

Common Problems & Troubleshooting

• No reading / zero TRO: check sample flow and pressure, blocked strainer, closed sample valve, empty reagent bottles.
• Unstable or wrong reading: dirty or scratched cuvette, air bubbles, expired reagent, high turbidity sample.
• Reagent not dosing: clogged check valves or tubing – flush or replace the check valve kit.
• Valve fault: check the FLOW and PURGE solenoid valve wiring and coil.
• No communication with ECS: check the RS-485 / signal cable, address setting (e.g. ADDR 5) and terminal connections.
• Display blank: check supply voltage, fuse and power supply / display board.

Safety notes: isolate power and close the sample line before opening the analyzer. Wear gloves and eye protection when handling DPD reagents (they contain acid/alkaline components). Follow the Techcross manual and ship's safety procedures.

Common Alarms

The CLX platform runs continuous self-diagnostics with four fault levels; levels 4, 3 and 2 give a warning while operation continues, and level 1 is an instrument failure that stops measurement. Faults are shown in a queue on the bottom line of the LCD, and the status LED blinks according to severity. Specific Techcross ECS alarm codes are not given here – please refer to the ship's ECS manual.

Maintenance Tips

• Replace reagents on schedule (Techcross TSU reagents typically every two months, or as per manual).
• Clean the cuvette and replace the tubing/cuvette kit periodically.
• Clean the inlet T-strainer screen regularly.
• Flush check valves to prevent reagent clogging.
• Verify the reading with a portable DPD test kit and calibrate when needed.
• Keep the enclosure door closed and cable glands tight.

Spare Parts & Replacement Availability

SM MARINE SERVICE™ supplies the Techcross TCL4ECS TRO analyzer and related Techcross ECS spare parts. Condition and availability are subject to confirmation. For a fast quotation, please send:

• Photo of the analyzer front and nameplate / serial label
• Photo and number of any failed PCB or module
• Vessel name, IMO number and ECS model
• Required quantity and delivery port

We ship worldwide by courier and air freight.

Why This Equipment Is Still Used

Thousands of ships operate Techcross ECS ballast water treatment systems to meet IMO D-2 and USCG requirements. The TRO analyzer is essential for correct dosing and safe discharge, so a working TCL4ECS (or a compatible replacement) is needed to keep the BWMS operational and avoid port state control problems.

FAQ

1. What is the Techcross TCL4ECS?
It is the online TRO sensor analyzer of the Techcross Electro-Cleen® System ballast water treatment system.

2. What does TRO mean?
Total Residual Oxidant – the amount of active oxidant (chlorine-based) in treated ballast water.

3. What does "CLX#1 ADDR:5" mean?
It is the installation label: analyzer No. 1 with communication address 5 on the ECS network.

4. Is the TCL4ECS based on the HF scientific CLX?
It appears to be built on the CLX platform, but this is not verified by a Techcross document.

5. Which measuring method is used?
DPD colorimetric method (on the CLX platform).

6. Do you supply the PCBs for the TCL4ECS?
Yes, on request. Send the PCB photo and number; internal PCB numbers are matched from the board label.

7. What is part number 09950?
The HF scientific tubing/cuvette kit for the CLX analyzer.

8. What is part number 25017S?
The CLX check valve kit for the reagent pump.

9. Which reagent is used for TRO?
Total chlorine DPD reagent (CLX catalog 09952 / 09948, 12-month kit 09956).

10. Why does my TRO analyzer show zero?
Usually no sample flow, empty reagent, clogged check valves or a blocked strainer.

11. Can you ship to my vessel's port?
Yes, SM MARINE SERVICE™ ships worldwide.

12. What condition is the unit?
Listed as refurbished; condition and availability are confirmed with each quotation.

13. Is the TCL4ECS a chlorine analyzer?
Yes. On board it is commonly called the chlorine analyzer or TRO analyzer, because it measures the residual chlorine / oxidant in treated ballast water.

Short Product Description

The Techcross TCL4ECS is the online TRO (Total Residual Oxidant) sensor analyzer, also called a chlorine analyzer, for the Techcross Electro-Cleen® System (ECS) ballast water treatment system. Installed in the TRO sampling unit, it measures oxidant concentration in treated ballast water using the DPD colorimetric method and sends the value to the ECS controller for electrolysis control and safe de-ballasting. The unit has an LCD display with keypad, a flow-through cuvette, reagent compartment, solenoid valves and 4–20 mA / RS-485 outputs. SM MARINE SERVICE™ supplies refurbished TCL4ECS analyzers, CLX-type spares and Techcross ECS parts worldwide.

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SM MARINE SERVICE™ – Marine Automation & Navigation Equipment Supplier

Available Equipment Conditions: New • Used • Refurbished • Reconditioned (Specific product condition and availability are subject to confirmation.)

Stock Locations: Bangladesh • China

Services: Worldwide Shipping • Technical Support • Spare Parts Supply • Marine Equipment Sourcing

Samir Market, DT Road, Pahartali, beside CDA Market, Chattogram, Bangladesh

Mobile / WhatsApp / Viber: +88 01818 929292

Email: info@smmarineservice.com

Website: https://www.smmarineservice.com/

Contact SM MARINE SERVICE™ today for a quotation on the Techcross TCL4ECS chlorine analyzer / TRO sensor analyzer and Techcross ECS spare parts.

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