Developed from practice and made in Germany. Our products are manufactured in an ISO 9001:2015 certified company.

Our practical experience has taught us the problems presented by water quality testing in regions with limited infrastructure. We have often found ourselves in the field or in the laboratory, dealing with unfavorable conditions and inappropriate equipment that caused more trouble than it was worth. As a result, we developed our own products, which are above all simple and practical.

LetzTEST Tube - Fecal Bacteria Presence / Absence

LetzTest Tubes are a presence/absence test to easily detect bacteria of fecal origin in drinking water. The test tubes have numerous advantages in their use in rural areas where a laboratory and qualified workforce resources might not be available. 

Form: Dry test strip

Shelf life: 2 years

Languages: English, French, Spanish

Art. no. : 116498 

LetzTEST Household Water Test Kit

The Household Water Test Kit is an educational presence /absence test kit, protected by patent office, which detects bacteria of fecal origin in drinking water. The Kit has numerous advantages in its use in rural areas and with respect to the objective of education and sustainable behavior change. 

Form: Recycled paper box
Outer Dimensions: 173x109x100 mm
Weight: 0,28 kg
Content: See technical data sheet
Languages: English, French, Spanish

Art. no. : 113858 (english kit)

Art. no. : 118183 (french kit)

Art. no. : 118185 (spanish kit)

LetzTEST Membrane Filtration Kit

The Membrane Filtration Kit quantifies E.coli & other coliform bacteria in water samples - in the laboratory and in the field. LetzTest has developed a portable membrane filtration kit that is perfectly adapted to the requirements of a water testing laboratory in limited infrastructure conditions: robust, electricity-free, high in quality, easy to transport, easy to use, independent of inappropriate consumables. Furthermore, the same kit can be used to quantify other relevant bacteria in water such as enterococcus, pseudomonas aeruginosa, heterotrophic bacteria, total count and many more. 

The Membrane Filtration Kit comes with a unique, re-writable practical handbook, which guides the tester through the entire testing procedure, from the moment of sampling to securing the data. The aim of this practical handbook is to ensure that the water quality testing data is correct in a setting where a robust quality management system might not yet be in place.

Form: Hard case
Outer Dimensions: 420 x 325 x 175 mm
Weight: 6.8 kg
Content: See technical data sheet
Languages: English, French, Spanish

Art. no. : 115433 (english kit) 

Art. no. : 118193 (french kit) 

Art. no. : 118197 (spanish kit) 

LetzTEST ELECTRICITY-FREE CHEMICAL Incubator 37°C (worldwide unique!!!)

Our patented, electricity-free incubator will revolutionize water quality testing in rural areas. LetzTest Tubes, Compact Dry Plates as well as Colilert Quanti-Trays fit perfectly into this unique incubator. Each Incubator comes with a robust temperature data logger. 

Form: glass fiber aluminum insulated bag
Dimension: 340 x 280 x 90 mm
Weight: 2 kg

Content: See technical data sheet
Operating temp.: 37°C +/- 0,5 °C, 24 h
Capacity: 25 LetzTest Tubes or 30 Compact DRY Plates or 3 Quanti-Trays
Languages: English, French, Spanish

Art. no. : 115178

Electrical Incubators

Our electrical incubators are specifically designed for areas of limited infrastructure and can be used in a laboratory and additionally in the fields. 


Total weight – Inc cables & adaptor: 1.2 Kg

External case size: 27 x 21 x 10(H) cm

Chamber size: 11 x 13 x 7 (H) cm

Power supply – Adaptor: 100-240v AC @ 320 mA
Power supply – Incubator: 12 Volts DC @ 1Amp
Temperature control: MX Darlington switched solid state
Temperature range: 37 °C +/- 7°C (adjustable)


Total weight – Inc cables & adaptor 3.5 Kg

 External case size- (footprint) 42 x 22 x 23(H) cm

 Chamber size (useable) – 30 x 15 x 13 (H) cm

 Power supply – Adaptor – 100-240v AC @ 360 mA

 Power supply – Incubator 12 Volts DC @ 2 Amps

Temperature control – MX Darlington switched solid state

Temperature range – Ambient + 5 to 45°C +/- 0.5°C


MX10 Art. no. : 117955

MX45 Art. no. : 123500

LetzTEST Liquid Sampler

Use the practical LetzTest Liquid Sampler to collect water samples from points where the sample can not be taken directly into the sample bottle or bag ( e.g. at a storage tank).

Weight: 0,6 kg
Volume: 350 ml
Length: 590 mm
Material: 1.4404 stainless steel

Art. no. : 117952

Compact Dry Plates - E.coli and other coliforms

The usage of our Compact Dry Plates is a simple and safe way for the determination and quantification of E.coli and other coliform bacteria, or E.coli only in water samples. As in some regions other coliforms are naturally present in the soil, the WHO suggests to test only for E.coli, which is a definit indicator for a fecal contamination. We very much suggest the use of these pre-prepared plates inn the fields and/or if a laboratory quality management system is not in place to assure correct results!

Ready-to-use: simply add 1mL of sterile water to activate the plate
Storage: 1-30°C (no fridge needed!)
Shelf life: 24 months
Max. 70 seconds „hands-on time“
Write sample ID on front part
Incubation: 24 hours at 35-38°C

E.coli and other coliforms, Art. no. : 115177

E.coli (only), Art. no. : 116379


NOTE: Additional plates for the determination of other types of bacteria (Pseudomonas Aeruginosa, Enterococcus, Total Counts and more) are available on demand.

Chromogenic Coliform Agar, CCA

Chromogenic selective agar to detect Escherichia coli and coliform bacteria from water with low accompanying flora (acc. to DIN EN ISO 9308-1). Pouring own petri dishes into reusable glass petri dishes is very cost-efficient for water laboratories!

  • Selective detection of E. coli and coliform bacteria
  • Rapid determination of important species E. coli, Citrobacter and Pseudomonas
  • Dehydrated culture medium Contains chromogenic subtrates

Quantity: 500g

Form: Powder

Colour: Beige

Storage: Dry, tightly closed, at 10...25 °C.

Shelf life: 2 years


Art. no. : 114924

Filtration Membranes -

for LetzTest Membrane Filtration Kit

Cellulose nitrate membranes for microbiological analysis, grid print, diameter 47 mm, pore width 0.45 μm, individually and sterile packed.

100 pieces / pack

Art. no. : 114930 


Thio Bags for Water Sampling - 100 ml

Designed for sampling and testing E.coli and other coliform bacteria in water that might contain residual chlorine. Each bag contains a nontoxic, nonnutritive tablet containing 10 mg of active sodium thiosulfate to neutralize chlorine at the moment of sampling.

100 pieces / pack

Art. no. : 114928

Bags for Water Sampling - 100 ml

For sampling unchlorinated water samples. Very easy and safe transportation compared to glass bottles that tend to break when the roads are in bad condition.

100 pieces / pack

Art. no. : 115407

Visual color comparator test - 

chlorine and pH

The Pooltester is an easy to use tool for measuring free available chlorine, total chlorine and pH (acidity) of water samples. It is a visual, color comparator test and uses reagent tablets, which color the sample water water according to the presence of chlorine or the pH. LetzTest especially recommends this kit to test for residual chlorine in areas of limited infrastructure.

Note:  A small number of reagent tablets are included with the unit but larger quantities should be requested separately.
Phenol Red - for pH
DPD1 - for free/residual chlorine
DPD3 - for total chlorine (used with DPD1)

Art. no. : 118311

Reagent tablets DPD1 - Free chlorine

250 pcs

Art. no. : 118312

Turbidity Tube

Keep it simple and safe!

The easiest and most suitable way to measure turbidity in NTU under limited conditions.

Weight: 0.2 kg
Dimensions: 33 x 6 x 2.5 cm

Art. no. : 117402

eXact® Micro 20 Smart Photometer

Easy to use, Waterproof, robust, precise, fast, easy to calibrate, accurate and providing results for 44 parameters. 

This very unique photometer can transmit the results to your smartphone by Bluetooth® and work in conjunction with the application eXact iDip® for iOS and Android to manage your testing data in a very easy and clear manner.

Results and automatically generated reports can be shared with responsible entities via e-mail and messenger apps.


Dual wavelength: 525 nm or 638 nm
Sample volume required: 4 mL
Battery life: > 2,000 tests
LED (Light Emitting Diode)


Meter with carrying case, acrylic calibration stick, cleaning brush, mixing cap, & instructions. 

Art. no. : 115931

eXact® pH+ Multimeter Kit

Easy to use and robust. This unique multimeter measures  pH, conductivity, salinity, total dissolved solids (TDS), temperature and the redox potential (different probe). Results can be transmitted to your connected device thanks to Bluetooth® technology. The portable kit works in conjunction with the application eXact iDip® for iOS and Android. Results and automatically generated reports can be shared with responsible entities via e-mail and messenger apps.


eXact® pH+ Smart Meter with carrying case

eXact® pH+ Multi Probe (pH, Conductivity, Salinity, TDS, Temperature)

Premixed pH calibration solutions (4.00 and 7.00)

Premixed Conductivity calibration solutions (12.88 mS/cm and 1413 μS/cm)

Soaking solution (3M KCl)

Calibration bottles (4)

Art. no. : 115945

How to get your LetzTEST Equipment?


>> Contact us

>> Get support in identifying the most suitable equipment

>> Receive an individual offer

>> Be supplied with high quality equipment at reasonable prices

>> Worldwide delivery !!!