
Legionella test kits - the fastest in the world
Is water quality testing and testing for Legionella your priority?
The Hydrosense rapid onsite Legionella test kits can help. We use Lateral Flow Immunochromatographic Assay (LFICA) technology. That is the same technology used in Covid and pregnancy tests.
Our easy-to-use Legionella test kits detect Legionella pneumophila sg1 antigen in water samples and biofilms, which is the species that causes over 90% of Legionnaires’ disease cases.
The results are delivered within 25 minutes, are highly accurate and have a recovery rate of 80% (lab culture is 64%). They come in singles or as test kits and are available in 2 sensitivity levels – Ultra and Multi.
Adding Hydrosense to your water management program will mean you have real-time knowledge, about the presence of Legionella, when conducting your water quality testing.
Ultra Range
These Legionella test kits are our most sensitive, offering detection levels of 100 CFU/l for water tests and 200 CFU per swabbed area for swab tests. Ideal for countries where there are more stringent action levels and for industries where the Legionella infection risk is high.
Multi Range
These Legionella test kits have sensitivity levels of 1,000CFU/l and 10,000CFU/l. The higher concentration of Legionella antigen, the stronger the colour of the positive line, which can be matched against the visual scorecard to give an indication of the level of Legionella present.
Hydrosense Legionella Industrial Kit

This Legionella test kit is ideal where repeated water sampling is required. It uses our unique Hydrosense filter technology, which isolates the bacteria via standard plumbing connections (US ½inch NPT and ¾ inch BPT fittings).
Recommended for high-risk areas such as industrial cooling towers, large water systems in hotels, healthcare, residential and commercial properties.
Available in Ultra and Multi range.
- The pipe fitting conveniently connects directly to a standard shower hose for shower sampling
- Sensitivity: Ultra (100 CFU/l). Multi (1,000/10,000 CFU/l)
- 5 test kit
- Shelf Life: 18 months from the date of manufacture
- Ultra part number: 100182. Multi part number: 100264
Hydrosense Ultra Legionella Swab Kit

The majority of Legionella is locked in biofilm, which is the slimy layer which forms on wet surfaces.
This Legionella test kit is used to swab the surface where biofilm is present and is very useful for locating the source of infection.
Recommended for testing cooling towers, water tanks, sinks, showers, misters, sprinklers, air washers, humidifiers and pool and spa surfaces.
- Sensitivity: 200 CFU per swabbed area
- Sample Area: 10 cm²
- 5 test kit
- Shelf Life: 18 months from the date of manufacture
- Part number: 100144
Hydrosense Legionella Complete Kit

This kit includes Legionella test kits for both water and biofilm, allowing a complete view of the health of a water system. It is perfect for risk assessments and for identifying the source of infection.
Recommended for testing water sample points and surfaces of cooling towers, fountains, water tanks, sinks, showers, misters and spas and pools.
Available in Ultra and Multi Range.
- 2 water and 2 swab test kit
- Ultra sensitivity: water test – 100 CFU/l. Swab test – 200 CFU per swabbed area
- Multi sensitivity: water test – 1,000 CFU/l and 10,000 CFU/l. Swab test: 200 CFU per
swabbed area - Shelf Life: 18 months from the date of manufacture
- Ultra part number: 100202. Multi part number: 100263
Hydrosense Legionella Water Test

This is our most flexible Legionella test kit – water samples can be collected from any source. It uses our unique Hydrosense filter technology which captures the bacteria as the water sample is pushed through.
Recommended for high-risk areas such as cooling towers, water tanks, fountains, showers, sinks, spas and pools.
- Sensitivity: Ultra (100 CFU/l) Multi (1,000/10,000 CFU/l)
- Shelf Life: 18 months from the date of manufacture.
- Ultra part number: 100198. Multi part number: 100254
Hydrosense Legionella Swab Test

The Hydrosense Ultra Legionella Swab Test is an easy option for quickly sampling surface biofilms.
Biofilm is common and can be found inside pipework, taps, shower heads and water tanks, and is often overlooked when it comes to Legionella risk. This Legionella test kit is excellent for locating the original source of infection.
- Sensitivity: 200 CFU per swabbed area
- Sample Area: 10 cm²
- Shelf Life: 18 months from the date of manufacture
- Ultra part number: 100220
Why choose Hydrosense rapid Legionella test kits?
It’s the world’s fastest on-site Legionella test
Delivers test results in 25 minutes
Can detect dangerous VBNC Legionella, something lab culture cannot
Anyone can carry out the tests with minimal training
Gives real-time results – you don’t have to wait several weeks for lab reports
The App and portal alert duty managers automatically and provides a robust dataset for risk analysis