UV Sterilisers|Dose Requirements for Waterborne Pathogens | Biotech Aquatica

Engineered UV Disinfection

UV STERILISERS SIZED BY SCIENCE

Every UV steriliser we sell is sized with BTA's custom-built UV engineering software — multi-lamp dose modelling that accounts for lamp placement, chamber material and your actual water. This is how we engineer our UVs.

124,480
Probe Points Per Model
280/315
mm Chambers
10
Lamps Per Reactor Max
67+
Pathogens Documented
How We Engineer Our UVs

SIZED BY OUR OWN UV ENGINEERING SOFTWARE

📐

True Multi-Lamp Geometry

Up to 10 lamps per reactor, each placed by exact X/Y position with individual wattage and arc length — dose is engineered, not assumed.

🧱

Chamber Material Modelled

Stainless steel, white PVC and dark chambers (grey PVC or black HDPE) reflect 254 nm UV differently. Our software applies material-specific geometry factors.

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Validated Accuracy

Every reactor is modelled lamp-by-lamp for your flow, water quality and target dose before it is built — so the dose you need is the dose you get.

BTA UV dose calculator title banner showing probe point count quadrature method compute time and accuracy statistics
UV Specifications — BTA's custom-built UV steriliser engineering software
Reactor parameters form including chamber material selector for stainless steel white PVC and dark grey PVC or black HDPE
We size for your reactor material
Lamp positioning entered by exact X and Y coordinates inside reactor cross-section
Customisable X/Y positioning vs chamber diameter
Results panel showing residence time geometry factor corrected fluence and final dose values
UV results — T5 and Amalgam specific sizing
Cross-section fluence rate distribution contour plot of five-lamp reactor midplane
Fluence distribution chart
The UVONIC Range

TWO SERIES. ONE ENGINEERING STANDARD.

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UVONIC CMLA — Commercial Multi-Lamp Amalgam

280 mm and 315 mm chambers, up to 10 amalgam lamps (320 W steps to 3,200 W), vertical or horizontal builds with interchangeable 80/100/150/200 mm flanges. Each lamp runs its own ballast with voltage meter, bulb indicators and over-temperature sensing.

View the UVONIC CMLA →
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UVONIC T5 — Aquarium Series (BTA Exclusive)

High-output T5 UV sterilisers for aquarium and light-commercial duty — the same engineering approach scaled to tank-side systems, with genuine BTA-exclusive specification and support.

View the UVONIC T5 →
Understanding UV Dose

HOW TO READ THE DATA

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UV-C Dose

Dose = intensity × contact time. Primary unit mJ/cm², secondary μWs/cm² (in brackets). Dose degrades with lamp age, sleeve fouling and low-UVT water.

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Log Reduction

Each log is a 10× reduction in organism count: 90% kill = 1 log, 99% = 2 log, 99.9% = 3 log. The columns show the dose required for each kill rate.

⚡

Why Dose Matters

A "25W" rating tells you nothing about dose delivered at your flow rate. We size by the actual required kill rate for your target organism and system parameters.

Reference Data

UV DOSE RATE REFERENCE TABLE

Organism 90% (1 Log)
mJ/cm² | μWs/cm² 		99% (2 Log)
mJ/cm² | μWs/cm² 		99.9% (3 Log)
mJ/cm² | μWs/cm² 		Log Unknown
mJ/cm² | μWs/cm² 		Max Dose
mJ/cm² | μWs/cm²
WATERBORNE HUMAN PATHOGENS
Legionella longbeachae — — — 2.9
(2,900) 		2.9
(2,900)
Legionella micdadai — — — 3.1
(3,100) 		3.1
(3,100)
Shigella flexneri – Dysentery 1.7
(1,700) 		3.4
(3,400) 		— — 3.4
(3,400)
Shigella paradysenteriae 1.68
(1,680) 		3.4
(3,400) 		— — 3.4
(3,400)
Legionella bozemanii — — — 3.5
(3,500) 		3.5
(3,500)
Legionella pneumophila (Legionnaires' disease) — — — 3.8
(3,800) 		3.8
(3,800)
Ebertelia typhosa 2.14
(2,140) 		4.1
(4,100) 		— — 4.1
(4,100)
Shigella dysenteriae – Dysentery 2.2
(2,200) 		4.2
(4,200) 		— — 4.2
(4,200)
Campylobacter jejuni — — — 4.6
(4,600) 		4.6
(4,600)
Legionella gormanii — — — 4.9
(4,900) 		4.9
(4,900)
Legionella dumoffi — — — 5.5
(5,500) 		5.5
(5,500)
Leptospira interrogans — — — 6
(6,000) 		6
(6,000)
Leptospiracanicola – Infectious Jaundice 3.15
(3,150) 		6
(6,000) 		— — 6
(6,000)
Bacillus paratyphusus 3.2
(3,200) 		6.1
(6,100) 		— — 6.1
(6,100)
Salmonella paratyphi – Enteric fever 3.2
(3,200) 		6.1
(6,100) 		— — 6.1
(6,100)
Vibrio comma – Cholera 3.375
(3,375) 		6.5
(6,500) 		— — 6.5
(6,500)
Bacteriophage – E. Coli 2.6
(2,600) 		6.6
(6,600) 		— — 6.6
(6,600)
Escherichia coli 3
(3,000) 		6.6
(6,600) 		— — 6.6
(6,600)
Salmonella typhosa – Typhoid fever 2.15
(2,150) 		4.1
(4,100) 		7
(7,000) 		— 7
(7,000)
Shigella sonnei — — — 7
(7,000) 		7
(7,000)
Salmonella enteritidis 4
(4,000) 		7.6
(7,600) 		— — 7.6
(7,600)
Cryptosporidium parvum — — — 7.9
(7,900) 		7.9
(7,900)
Hepatitis virus — — — 8
(8,000) 		8
(8,000)
Infectious Hepatitis 5.8
(5,800) 		8
(8,000) 		— — 8
(8,000)
Enterococcus faecalis — — — 10
(10,000) 		10
(10,000)
Giardia lamblia (beaver fever) — — — 10
(10,000) 		10
(10,000)
Pseudomonas aeruginosa 5.5
(5,500) 		10.5
(10,500) 		— — 10.5
(10,500)
Pseudomonas fluorescens 3.5
(3,500) 		6.6
(6,600) 		11
(11,000) 		— 11
(11,000)
Salmonella typhimurium 8
(8,000) 		15.2
(15,200) 		— — 15.2
(15,200)
Cryptosporidium sp. (diarrhoeal disease) 2.5
(2,500) 		5.8
(5,800) 		12
(12,000) 		— 22
(22,000)
Chlorella vulgaris (green water algae) 13
(13,000) 		22
(22,000) 		— — 22
(22,000)
Giardia Cysts 2.1
(2,100) 		5.2
(5,200) 		11
(11,000) 		— 22
(22,000)
Rotavirus — — — 24
(24,000) 		24
(24,000)
Nematode Eggs 45
(45,000) 		92
(92,000) 		— — 92
(92,000)
AQUACULTURE & FISH PATHOGENS
Aeromonas salmonicida — — 3.62
(3,620) 		— 3.62
(3,620)
KHV – Koi Herpes Virus — — 4
(4,000) 		— 4
(4,000)
ISA (Infectious Salmon Anaemia) — — — 8
(8,000) 		8
(8,000)
Lactococcus lactis — — — 8.8
(8,800) 		8.8
(8,800)
Saprolegnia hyphae — — — 10
(10,000) 		10
(10,000)
CCV (Channel Catfish Virus) — — — 20
(20,000) 		20
(20,000)
IHNV (Infectious Haematopoietic Necrosis / CHAB) — — 20
(20,000) 		— 20
(20,000)
OMV (Oncorhynchus masou virus) — — — 20
(20,000) 		20
(20,000)
Streptococcus sp. (seawater) — — — 20
(20,000) 		20
(20,000)
Ceratomyxa shasta — — 30
(30,000) 		— 30
(30,000)
Perkinsus marinus (dermo disease) — — — 30
(30,000) 		30
(30,000)
IHNV (Infectious Haematopoietic Necrosis / RTTO) — — — 30
(30,000) 		30
(30,000)
Yersinia ruckeri — — — 30
(30,000) 		30
(30,000)
Vibrio anguillarum — — — 30
(30,000) 		30
(30,000)
VHS (Viral Haemorrhagic Septicaemia) — — — 32
(32,000) 		32
(32,000)
Trichodina sp. — — 35
(35,000) 		— 35
(35,000)
Saprolegnia (Zoospores) – Fin Rot — — 39.6
(39,600) 		— 39.6
(39,600)
Myxobolus cerebralis (TAMs – Whirling Disease) — — — 40
(40,000) 		40
(40,000)
BKD (Bacterial Kidney Disease) — — — 60
(60,000) 		60
(60,000)
AGD – Amoebic Gill Disease (Paramoebae perurans) 66
(66,000) 		— — — 66
(66,000)
CSV (Chum Salmon Virus) — — — 100
(100,000) 		100
(100,000)
Ichthyophthirius tomites (Freshwater White Spot) — — — 100
(100,000) 		100
(100,000)
AHNV (Atlantic Halibut Nodavirus) — — — 105
(105,000) 		105
(105,000)
Amyloodinium ocellatum (Marine Velvet) — — — 105
(105,000) 		105
(105,000)
Oodinium — — — 105
(105,000) 		105
(105,000)
Brooklynella — — 126
(126,000) 		— 126
(126,000)
Flavobacterium psychrophilum — — — 126
(126,000) 		126
(126,000)
Vibrio sp. (oyster) — — — 155
(155,000) 		155
(155,000)
Trichodina nigra — — — 159
(159,000) 		159
(159,000)
Saprolegnia diclina (zoospores) — — — 170
(170,000) 		170
(170,000)
Cryptocaryon irritans (Marine White Spot) — — — 280
(280,000) 		280
(280,000)
Costia necatrix — — 318
(318,000) 		— 318
(318,000)
IPNV (Infectious Pancreatic Necrosis Virus) 150
(150,000) 		— 336.7
(336,700) 		— 336.7
(336,700)
Why this matters: A unit rated at "25W" tells you nothing about the actual UV-C dose delivered at your flow rate. Contact time, lamp age, water clarity and sleeve fouling all reduce effective dose. We size sterilisers on your actual required kill rate and system parameters — not marketing wattage.
Common Questions

UV STERILISER FAQ

How do you size a UV steriliser for my system?

We model it with our custom-built UV engineering software using your flow rate, water transmittance, target organism and required kill rate. The result is a reactor configuration that actually delivers the dose — not a wattage picked from a generic chart.

Does chamber material really change the UV dose?

Yes. Stainless steel, white PVC and dark chambers (grey PVC or black HDPE) reflect 254 nm UV differently, which changes the delivered dose. Our software applies material-specific geometry factors so every build is sized honestly for its actual chamber.

What is the difference between the UVONIC CMLA and the UVONIC T5?

The CMLA is the commercial multi-lamp amalgam series — 280 mm and 315 mm chambers with up to ten 320 W amalgam lamps for aquaculture and commercial water treatment. The T5 series covers aquarium and light-commercial duty with high-output T5 lamps. Both are sized with the same dose modelling software.

Can a UV steriliser be retrofitted to an existing system?

Yes. Send us your flow rate, water transmittance and target dose and we will model the retrofit — including verifying whether your existing unit is actually delivering the dose you need.

Why does dose matter more than wattage?

A wattage rating tells you nothing about the dose delivered at your flow rate. Contact time, lamp age, water clarity and sleeve fouling all reduce effective dose. Sizing by verified pathogen dose requirements is the only honest way to specify a UV.

Do you sell replacement lamps and spares?

Yes — genuine amalgam and T5 lamps, quartz sleeves, seals and ballasts for the UVONIC range. Contact us with your model code for the right spares.

NOT SURE WHAT YOUR UV IS ACTUALLY DOING?

Want to check the sizing of an existing unit, or retrofit a UV reactor to another system and verify the dose rate? That is exactly what we built our UV calculator for. Send us your flow rate, water transmittance and target dose — we will model it and give you the numbers.

Request A UV Sizing →Shop The Range

TRADE & WHOLESALE

Aquaculture facilities, RAS operators, maintenance teams and installers can contact BTA for commercial UV sizing, bulk requirements and trade pricing.

Request Trade PricingAsk A Technical Question

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