9001357 03 UV Intensity Sensor Calibrated 3000 W/m² for Alfa Laval BWTS
Factory Calibrated 0 ~ 3000 W/m² UV Intensity Sensor 9001357 03, QT201-50 UV Sensor for Alfa Laval UV Reactor 1000 & UV Reactor 1500
Introduction: The Critical Role of QT201-50 UV Intensity Sensor in Alfa Laval PureBallast BWTS
The QT201-50 UV intensity sensor (OEM part number 9001357 03) is the core real-time monitoring component exclusively engineered for Alfa Laval PureBallast 3.1 UV Reactor 1000 and UV Reactor 150 ballast water treatment systems (BWTS). As the “vision” of medium-pressure UV disinfection reactors, this factory-calibrated UV sensor continuously measures real-time UV intensity (UVI, W/m²) inside the reactor chamber, delivering precise analog signals to the PureBallast PLC control cabinet for automatic lamp power optimization, flow throttling, compliance alarm triggering, and CIP cleaning cycle scheduling.
Alfa Laval PureBallast systems rely on UVI data from QT201-50 to satisfy strict IMO D-2 discharge standards and USCG 46 CFR Type Approval regulations:
In IMO Mode: The system maintains 100% certified flow when UVI ≥252 W/m²; flow limits to 50% if intensity drops below the compliant threshold.
In USCG Mode: Minimum compliant UVI is 772 W/m²; the control valve automatically adjusts flow between 50–100% full rated capacity based on QT201-50 readings.
Without a functional, calibrated QT201-50 sensor, the BWTS cannot prove full disinfection efficacy, triggering persistent W151/W152 non-compliance warnings, disabling legal ballast/deballast operations in US territorial waters, and failing port state control (PSC) inspections.
Product Parameters for Fiver's Alfa Laval UV Sensor 9001357 03 Replacement
| Part Number | QT201-50/ 9001357 03 |
| Material | SUS316L |
| UV Reactor | Alfa Laval UV Reactor 1000 & UV Reactor 1500 |
| Model | SUV 20.2 Y2 C 40° 3000 W/m² |
3. Key Functional Advantages for PureBallast BWTS Operators
3.1 Real-Time UV Power Optimization (Core System Function)
QT201-50 feeds live UVI readings to the Lamp Power Supply (LPS) inside LDC3.1 cabinets. The PLC automatically dims medium-pressure UV lamps between 50–100% output:
Clear offshore water (high UVI): Reduce lamp power to cut vessel power consumption and extend UV lamp service life.
Turbid coastal/muddy seawater (low UVI): Ramp lamp output to full 6kW to maintain disinfection dose required by USCG/IMO rules.
3.2 Automatic Flow Regulation & Compliance Guarantee
Coupled with FIT201-1 flow meter and V201-8 Siemens control valve, QT201-50’s UVI data governs maximum allowable treatment flow. If sensor detects insufficient UV penetration from sediment fouled quartz sleeves, the system restricts flow to avoid non-compliant ballast discharge, eliminating PSC detention risks.
3.3 Predictive CIP Cleaning Trigger
Persistent low UVI readings from QT201-50 notify operators to launch CIP circulation (25-minute default cycle) to remove calcium scaling and marine biofouling on quartz sleeves. Without valid sensor data, the system cannot track the mandatory 30-hour post-operation CIP deadline, generating permanent W140 CIP overdue warnings.
3.4 UV Lamp Fault Diagnosis
QT201-50 detects single/multiple broken UV lamps: If lamp failure occurs, UVI drops sharply, system automatically reduces certified flow to 80% (IMO) / 50% (USCG), logs fault records to the 24-month event log storage for port audit traceability.
3.5 Factory Pre-Calibrated, Plug-and-Play Spare Part
Alfa Laval service documentation confirms QT201-50 requires no shipboard calibration. Vessel engineers simply replace the old sensor, reset the minor alarm, and resume ballast operations—saving costly shore calibration service fees and vessel downtime. It is listed as mandatory onboard spare part for all UVR1000/1500 BWTS per Alfa Laval annual inspection guidelines.
4. Marine & Regulatory Compliance Value
USCG Type Approval Matching: Original specification UV detector matching factory test bench data, ensures BWTS retains USCG certification after spare part replacement. Non-calibrated third-party uncertified sensors void USCG compliance.
IMO BWMS Code MEPC.300(72) Compliant: Continuous UVI logging via QT201-50 provides digital audit trails for all ballast/deballast cycles, mandatory for global port inspections.
Classification Society Approved (DNV-GL, ABS, CCS, BV): Meets marine equipment shock, vibration, and seawater corrosion standards for engine room installation.
CIP Chemical Compatibility: Sensor lens resists Alfa Laval Alpacon Descalant Offshore acidic cleaning liquid during routine reactor maintenance.
5. Common Failure Risks Without Replacing QT201-50 (9001357 03)
Constant W151 low UV intensity warning alarm, system locks full flow capacity
Loss of automatic lamp power saving function, drastically shortening 6kW UV lamp lifespan
PSC inspection detention risk due to unverifiable disinfection UV dose
Inability to monitor quartz sleeve fouling, leading to permanent reactor performance degradation
Void of Alfa Laval BWTS type approval when non-calibrated substitute sensors are fitted
6. Application Scenarios
Bulk carriers, container ships, tankers, offshore supply vessels fitted with PureBallast UVR1000 / UVR1500 BWTS
Ship spare part stock replenishment for marine suppliers & ship chandlers
Vessel drydock overhaul, annual BWTS calibration & inspection replacement
Emergency at-sea sensor breakdown replacement for transoceanic vessels
7. Product Summary
he Factory Calibrated QT201-50 UV Intensity Sensor (Part No.9001357 03) is the genuine OEM monitoring spare part exclusively designed for Alfa Laval PureBallast UV Reactor 1000 and UV Reactor 150 ballast water treatment systems. With a full 0~3000 W/m² measuring range and factory pre-calibration, it delivers accurate real-time UV intensity data to support automatic power regulation, flow control, CIP scheduling, and full IMO & USCG regulatory compliance. For vessel owners, marine service companies and ship chandlers, this plug-and-play UV sensor eliminates calibration downtime, prevents port detention, and extends the service life of costly medium-pressure UV lamps and UV reactors—an indispensable critical spare part for all PureBallast 1000/1500 BWTS installations worldwide.
