9006325-02 Temperature Transmitter Replacement | TT201-33 for PureBallast BWTS
9006325-02 Temperature Transmitter Replacement — TT201-33 for Alfa Laval PureBallast BWTS
The compliance-critical sensor your PureBallast system can't operate without — at 40–60% below OEM pricing.
Inside every Alfa Laval PureBallast ballast water treatment system, a network of sensors and transmitters continuously monitors reactor conditions and feeds real-time data to the control system. Among the most critical is the reactor temperature transmitter — designated TT201-33 in Alfa Laval's system documentation, OEM part number 9006325-02.
This transmitter measures the temperature of ballast water inside the UV reactor and sends a continuous signal to the PureBallast control system. If the water temperature exceeds safe operating limits, the control system automatically reduces power or shuts down the reactor to prevent damage to the UV lamps and quartz sleeves. A failed or drifting temperature transmitter doesn't just generate an alarm — it can trigger an unscheduled BWTS shutdown during a ballasting operation, potentially delaying your vessel's departure and risking a port state control compliance failure.
The FiverUVC 9006325-02 temperature transmitter is a direct, specification-matched replacement for the Alfa Laval original — designed to deliver identical measurement accuracy, signal output, and mechanical fit within the PureBallast UV reactor. It is included in Alfa Laval's mandatory Emergency Spare Part Kit and is required to be carried onboard at all times.
Technical Specifications
What the Temperature Transmitter Does in Your PureBallast System
Reactor Temperature Monitoring — Safety & Compliance
The PureBallast UV reactor operates with high-power medium-pressure mercury vapor lamps (6,000W each) that generate significant heat. The temperature transmitter TT201-33 is installed in direct contact with the ballast water inside the reactor and continuously measures water temperature. This reading serves three critical functions:
Thermal protection: If water temperature exceeds the safe operating threshold (alarm A137 triggers at 65°C via the associated temperature switch TS201-60), the control system automatically reduces lamp power or initiates an emergency shutdown — preventing quartz sleeve fracture, lamp failure, or reactor damage.
UV dose calculation: Water temperature affects UV transmittance (UVT) and the system's dose-delivery model. The control system uses temperature data to adjust lamp power output for optimal sterilization performance across varying water conditions.
Compliance logging: Temperature data is recorded in the system's operational log, which may be reviewed during port state control inspections to verify that the BWTS operated within approved parameters during ballasting operations.
Why a Failed Transmitter Is More Than a Nuisance
When TT201-33 fails or drifts outside the allowed calibration range (0.95–1.05 ratio), the PureBallast control system cannot verify reactor temperature. This triggers a system alarm and, depending on your system configuration and operating mode, may cause:
Automatic BWTS shutdown — the system cannot safely operate without verified temperature data.
Inability to ballast/deballast — if the BWTS is offline, ballasting operations may need to be postponed, delaying your vessel's schedule.
Port state control risk — if the BWTS is non-operational during a PSC inspection, your vessel may be detained until the system is repaired.
Key Features & Benefits
1. Direct OEM-Specification Replacement — Part Number 9006325-02
The FiverUVC temperature transmitter is manufactured to match the Alfa Laval 9006325-02 specification across all critical parameters: PT100 RTD sensor element, 4-20mA two-wire output signal, probe dimensions, thread type, and electrical connection. It installs directly into the PureBallast UV reactor mounting port — no adapters, no wiring modifications, no control system recalibration required. The control system recognizes the transmitter immediately upon installation.
2. PT100 RTD Technology — Marine-Grade Accuracy
The transmitter uses a Class A PT100 platinum resistance temperature detector (RTD) — the industry standard for precision industrial temperature measurement. PT100 sensors offer:
Accuracy of ± 0.2°C across the full measurement range — well within the 0.95–1.05 variance allowed by the PureBallast calibration procedure.
Long-term stability — PT100 elements have minimal drift over time, reducing the frequency of out-of-tolerance calibration failures.
Immunity to electromagnetic interference — critical in the engine room environment where high-power lamp drive cabinets generate significant EMI.
Linear response — simplifies the 4-20mA signal conversion in the transmitter electronics, ensuring accurate temperature reporting to the control system.
3. Submersible Construction for Reactor Service
The transmitter probe is in direct contact with ballast water — which may be seawater, fresh water, or brackish water depending on the vessel's operating area. The FiverUVC 9006325-02 is built for this environment:
316L stainless steel probe — resists chloride corrosion from seawater exposure, maintaining measurement accuracy over the full service life.
IP68 submersible rating — fully sealed electronics housing prevents water ingress even under sustained submersion or high-pressure conditions inside the reactor.
Vibration-resistant construction — the internal RTD element and signal conditioning electronics are potted and shock-mounted to survive the continuous vibration of a ship's engine room.
Marine-grade cable and connector — shielded cable with salt-water-resistant jacket, terminated with a corrosion-proof connector that mates directly with the PureBallast reactor wiring.
4. Annual Calibration — Designed for Easy Verification
IMO and USCG regulations require annual calibration of all PureBallast sensors and transmitters, including TT201-33. The FiverUVC transmitter is designed to make this process straightforward, following the same procedure specified in the Alfa Laval Annual Inspection and Calibration manual:
Dismount the transmitter from the reactor (threaded connection, no special tools).
Immerse the probe in water at a known, stable temperature (verified with a calibrated reference thermometer).
Compare the reading displayed in the PureBallast control system against the reference temperature.
Calculate the variance ratio (system reading ÷ reference). Must be between 0.95 and 1.05.
If the transmitter is outside the allowed range and cannot be corrected through the control system's offset adjustment, it must be replaced. Having a FiverUVC spare onboard means your crew can complete the replacement immediately — no waiting for OEM parts to arrive at the next port.
Applications & Use Cases
PureBallast Emergency Spare Part Kit (Mandatory Onboard)
Alfa Laval specifies that every PureBallast-equipped vessel must carry an Emergency Spare Part Kit containing one of each of the following critical components. The temperature transmitter (9006325-02) is item #3 on this list:
| # | Spare Part | OEM Part Number | Function |
|---|---|---|---|
| 1 | UV Lamp Set (1 lamp + 2 O-rings) | 9009521-80 | UV-C sterilization |
| 2 | Quartz Sleeve Set (1 sleeve + 2 O-rings) | 594645-82 | Lamp protection & UV transmission |
| 3 | Temperature Transmitter | 9006325-02 | Reactor temperature monitoring |
| 4 | Temperature Switch | 9006324-02 | High-temperature alarm (A137 @ 65°C) |
| 5 | Lamp Power Supply (LPS) | 9012146-01 | Lamp ignition & power regulation |
| 6 | UV Sensor | 9001357-03 | UV-C intensity measurement |
| 7 | Filter Maintenance Kit | 9011963-84 | Filter seal replacement |
| 8 | CIP Fluid | 9012167-01 | Reactor & filter cleaning |
If your vessel's emergency kit is missing the temperature transmitter — or if the spare has been used during a previous repair — replacing it with a FiverUVC 9006325-02 restores your regulatory compliance at a fraction of the OEM cost.
Annual Calibration Replacement
During the annual PureBallast inspection and calibration, if TT201-33 fails the calibration check (variance outside 0.95–1.05) and cannot be corrected via the control system offset, the transmitter must be replaced. Having a FiverUVC spare on hand allows your crew or service engineer to complete the replacement during the same service visit — no follow-up appointment needed.
Fleet Standardization
For fleet operators with multiple PureBallast-equipped vessels, standardizing on FiverUVC replacement transmitters ensures consistent spare part inventory across the fleet and reduces per-unit procurement costs through volume pricing.
Why Choose FiverUVC for Your BWTS Sensor Replacements
20+ Years of Marine UV System Expertise
Fiver Environment Group Co., Ltd. (est. 1996) is an ISO 9001:2015 certified manufacturer with over 20,000 m² of production facilities and 70+ invention patents in UV technology. While we are best known for our UV lamp replacements, our engineering team has deep expertise across the full PureBallast component ecosystem — including the sensors and transmitters that keep the system running safely.
Specification-Verified, Not "Generic"
Many aftermarket suppliers offer "universal" temperature transmitters that may physically fit the reactor port but have different sensor characteristics, signal ranges, or response times than the OEM part. This can cause:
Inaccurate temperature readings that fail the annual calibration check.
Control system alarms due to signal mismatch.
Incorrect UV dose calculations that compromise sterilization performance.
The FiverUVC 9006325-02 is not a generic sensor — it is specified to match the OEM part number across all critical parameters: sensor type (PT100 Class A), output signal (4-20mA 2-wire), measurement range, probe material (316L SS), protection rating (IP68), and mechanical interface. Every unit is individually tested for accuracy before shipment.
Quality Assurance
Stage 1: PT100 element calibration — 3-point bath test (0°C, 50°C, 80°C) with NIST-traceable reference.
Stage 2: 4-20mA output verification — signal accuracy tested across full measurement range.
Stage 3: Pressure and leak test — IP68 integrity verified at 3 bar sustained pressure.
Stage 4: Electrical safety — insulation resistance and dielectric strength tested per IEC 61010.
Related BWTS Spare Parts
Temperature Switch 9006324-02 (TS201-60) — High-temperature alarm switch for PureBallast reactor. Triggers alarm A137 at 65°C. Pairs with the temperature transmitter for complete reactor thermal protection. View temperature switch →
UV Sensor 9001357-03 (QT201-50) — UV-C intensity sensor for PureBallast reactor. Requires annual replacement per Alfa Laval maintenance schedule. View UV sensor →
UV Lamp 900952180 / 900781080 — 6KW medium-pressure UV lamp replacements for PureBallast BWTS. View 900952180 (535mm) → | View 900781080 (545mm) →
Quartz Sleeve 594645-82 — High-purity fused silica sleeve replacement. Replace alongside every lamp change. View quartz sleeve →
Complete Emergency Spare Part Kit — All 8 mandatory spares in one package. The most cost-effective way to ensure full compliance. View complete kit →
Frequently Asked Questions
What temperature transmitter does the Alfa Laval PureBallast BWTS use?
The PureBallast BWTS uses a PT100 RTD temperature transmitter with OEM part number 9006325-02, designated as TT201-33 in the system documentation. It is installed in the UV reactor and provides a 4-20mA signal to the control system for continuous water temperature monitoring. It is one of eight mandatory items in the PureBallast Emergency Spare Part Kit.
What is the part number for the PureBallast temperature transmitter?
The OEM part number is 9006325-02 (sometimes written as 900632502). The system tag designation is TT201-33. FiverUVC manufactures a direct, specification-matched replacement under the same part number.
How often does the PureBallast temperature transmitter need to be calibrated?
The temperature transmitter TT201-33 requires annual calibration per both IMO and USCG requirements. The calibration procedure involves dismounting the transmitter, immersing it in water at a known temperature, and comparing the reading in the control system against a calibrated reference. The allowed variance is a ratio of 0.95 to 1.05 (system reading ÷ reference temperature). If the transmitter cannot be brought within this range, it must be replaced.
Is the FiverUVC 9006325-02 a direct replacement for the Alfa Laval original?
Yes. The FiverUVC 9006325-02 is manufactured to match the OEM specification: PT100 Class A RTD sensor, 4-20mA two-wire output, 316L stainless steel probe, IP68 protection rating, and the same mechanical thread and electrical connection. It installs directly into the PureBallast reactor — no adapters or modifications required.
What happens if the temperature transmitter fails during operation?
If TT201-33 fails or drifts outside the calibration range, the PureBallast control system will generate an alarm and may automatically shut down the UV reactor to prevent unsafe operation. This can interrupt ballasting operations and potentially lead to a port state control compliance issue if the BWTS is non-operational during an inspection. For this reason, carrying a spare transmitter (part of the mandatory Emergency Spare Part Kit) is essential.
What is the difference between the temperature transmitter and the temperature switch?
The temperature transmitter (TT201-33, P/N 9006325-02) provides continuous temperature measurement to the control system for monitoring and UV dose calculation. The temperature switch (TS201-60, P/N 9006324-02) is a separate safety device that triggers a hard alarm (A137) at 65°C for emergency reactor shutdown. Both are mandatory spare parts and both require annual calibration.
How much can I save compared to the OEM transmitter?
Customers typically save 40–60% versus OEM pricing for the 9006325-02 transmitter. We offer competitive single-unit pricing and volume discounts for fleet operators ordering multiple spares. Contact our sales team for a current quote.
What is the warranty on this temperature transmitter?
The FiverUVC 9006325-02 temperature transmitter carries a 12-month warranty covering manufacturing defects and measurement accuracy drift outside the specified ± 0.2% FS. Warranty claims are processed within 5 business days with replacement shipment included.
Do you ship to all ports?
Yes. We dispatch all in-stock orders within 24 hours of payment confirmation. Express courier delivery: 2–4 days to major European and Asian ports, 4–7 days to the Americas and Middle East. We can also deliver directly to your vessel's port agent.
