Photometer Selection Guide

Investing in a photometer ... Choose from the proven range of fast, accurate and economical instruments.

Select Scientific stocks and supports quality photometers from premium manufacturers from the USA and Germany. They offer performance features, innovative design and cost-effective onsite water testing for the water professional and domestic user alike. To skip straight to the parameter comparison click here

Quick overview

PhotometerDesigned for
PoolLab Pool and process water testing
PrimeLab Professionals in pool and spa, water testing, environmental and process
Pool eXact EZ Residential pool testing
Chlorine+ eXact EZ Process water testing
eXact Micro 20 Drinking water, pools and spas, environmental, process and educational testing


Professional quality, without the professional price.

The PoolLab is the newest photometer from Water-ID, makers of the PrimeLab photometer. Water-ID brought their experience making high quality professional photometers to the consumer market with the PoolLab.

The PoolLab is a single wavelength photometer perfect for water analysis of private pools and spas. It features a built-in but changeable cuvette. It has a waterproof rating of IP68, so the whole device can be dipped into the water to collect the sample. The device has onboard storage of results and Bluetooth to connect to a phone or tablet. This allows you to save results digitally and optionally upload them to the cloud where they can be syncronised with other devices (computers, phones or tablets).  

View Poollab Photometer


The PrimeLab represents the latest generation of photometers.

With a unique white light source and the JENCOLOR multi-spectral sensor used exclusively in the PrimeLab, it is possible to measure all water parameters covered in the visible spectrum between 380 – 780nm. The excellent accuracy of the JENCOLOR sensor even allows self-calibration of the system at the press of a button.

The Primelab is capable of testing more than 130 different parameters. Each Primelab photometer is customised to your exact needs. This means you only pay for parameters you need and gives you the flexibility to add more parameters at any time.

The Primelab has an optional smartphone app (Currently Android only). The app allows you to wirelessly control the photometer, store results, save GPS locations for your tests, generate reports (PDF or Excel) and send them directly from your phone. The app also has cloud storage and review of results. 

With additional attachments the primelab also has the ability to test NTU turbidity and legionella.

View Primelab Photometer

Pool eXact EZ v2 Photometer

Maintain your pool water chemicals the safe and easy way with the Pool eXact EZ! The slim, compact design is easy to use and is ideal for the commercial and home pools alike. The Pool eXact EZ uses their patented eXact Strips, a quick and easy reagent system. See below for more information about the eXact strip reagent system.

View Pool eXact EZ Photometer

Chlorine + eXact EZ

The Chlorine + eXact EZ tests 9 important water quality parameters and uses the patented eXact Strips, same as the Pool eXact EZ. This photometer is perfect for process water testing. You will be amazed at how effortless it is to achieve accurate results within seconds.

View Chlorine + eXact EZ Photometer

eXact Micro 20 Bluetooth

The ultimate water quality tester, the eXact Micro 20 with Bluetooth SMART is a powerful dual-wavelength photometer system that uses bluetooth technology to connect wirelessly to your phone or tablet. It quickly does on-site testing for over 40 parameters as a stand alone unit, or paired with our new eXact iDip smartphone app. The dual narrow band wavelength filters ensure delivery of the most accurate results.

View eXact Micro 20 Photometer

The eXact Strip Reagent Method

Now there is an alternative to powder pillows, powder packets, tablets, glass ampoules, and liquid systems: eXact Reagent Strips! By dipping a strip into a cell, the exact amount of reagent is released into the water causing a reaction. The reaction inside the water sample is measured by light inside the photometer giving the user fast and exact results.

Mobile Users: To view the full table below please switch to portrait orientation.

Parameter Primelab PoolLab Pool eXact EZ v2 eXact Micro 20 Chlorine+ eXact EZ
Price $1,633.50 $341 $467.50 $1,424.50 $467.50
Active Oxygen  
(0 - 40ppm)
 Alkalinity, Total  
(5 - 200ppm)
(0 - 300ppm)
(10 - 200ppm)

(8 - 200 ppm)
(0 - 0.3ppm)
(0.01 - 1.20ppm)
(0 - 1ppm)
(0.02 - 2.40ppm)
(0 - 2ppm)
(0 - 18ppm)
(0.0 - 13.5ppm)
(0.01 - 12.0ppm)
(0.00 - 17ppm)
Calcium Hardness  
(0 - 500ppm)
(0 - 500ppm)
(20 - 700ppm)

(20 - 400ppm)
(0 - 8 ppm)
(0.5 - 25ppm)
(80 - 6700ppm)

(3 - 270ppm)
Chlorine Dioxide  
(0 - 15.0ppm)

(0.0 - 11.4ppm)
(0.04 - 7.00ppm)
(0.00 - 6ppm)
Chlorine, Free  
(0.00 - 8ppm)

(0.00 - 6.00ppm)
(0.00 - 12.0ppm)

(0.01 - 6.20ppm)
(0.00 - 12.0ppm)
Chlorine, Combined/Total  
(0.00 - 8ppm)
(0.00 - 6.00ppm)
(0.00 - 12.0ppm)

(0.01 - 6.20ppm)
(0.00 - 12.0ppm)
Chlorine, High Range  
(5 - 200ppm)
(1 - 270ppm)
(1.0 - 200ppm)
Chromium (VI)  
(0 - 2.2ppm)
(0.01 - 1.80ppm)
(0 - 15000ppm)
(0 - 500ppm)
(0 - 5ppm)
(0.00 - 9.0ppm)

(0.01 - 10.0ppm)
(0.01 - 10.0ppm)
Cyanuric Acid  
(2 - 160ppm)
(0 - 160ppm)
(1 - 110ppm)

(1 - 110ppm)
(0 - 13ppm)
(0 - 2ppm)
(0.04 - 1.50ppm)
Hardness, Total  
(LR: 2 - 50)
(HR: 20 - 500ppm)
(0 - 500ppm)
(LR: 1 - 80ppm)
(HR: 60 - 600ppm)
Hydrogen Peroxide  
(0 - 3.8ppm)

(LR: 0.00 - 2.90ppm)
(HR: 0 - 200ppm)
(0.3 - 100ppm)
(0.5 - 130ppm)
(0 - 28ppm)
Iron, Total  
(0 - 1ppm)
(0.03 - 6.0ppm)
(60 - 1000000 cfu/test)

(VLR: 0 - 0.030ppm)
(LR: 0.2 - 5ppm)

(0.02 - 1.50ppm)
(LR: 0 - 15ppm)
(HR: 1 - 100ppm)
(0.01 - 3.00ppm)
(0 - 7ppm)
(0.00 - 11.00 ppm)
(0.12 - 30.0ppm)

(LR: 0 - 0.5 ppm)
(HR: 0 - 1500ppm) 
(0.01 - 1.80ppm)
(0 - 5.4ppm)
(0.00 - 4.00ppm)
(0.01 - 2.00ppm)
(0.00 - 2ppm)
Peracetic Acid      
(0.01 - 430ppm)
(2 - 590ppm)
(5 - 11)
(6.5 - 8.4)

(6.4 - 8.4)

(6.4 - 8.4)
(6.4 - 8.4)
(0 - 5ppm)
(2 - 60ppm)
(LR: 0 - 4ppm)
(HR: 0 - 80ppm)
(0.2 - 3.0ppm)

(0.03 - 4ppm)
(0.7 - 12ppm)
(0 - 1000ppm)
(25 - 150ppm)
(2 - 80ppm)
Sodium Hypochlorite  
(0.2 - 40 %)
(5 - 100ppm)
(2 - 210ppm)
(0.04 - 0.5 ppm)
(0.01 - 1.6ppm)
Suspended Solids  
(0 - 750ppm)
(0.02 - 1000 NTU)
(0 - 1ppm)

 Information is correct at time of publishing (May 2018) New tests may be avaliable; contact us for information.


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  1. PoolLab Photometer

    The new PoolLab 1.0 is a triple wavelength photometer (530, 570, 620 nm) for the complete analysis of pools, spas and other water analysis applications. An in-built, changeable cuvette allows quick water sampling by just dipping the IP67 waterproof PoolLab into your sample and selecting the desired test.

    To assure you of ongoing reliable performance in these challenging conditions, Select Scientific technical staff quality check each Pool Lab, and ensure the PoolLab is fit and ready to work for you. This service is exclusive to Select Scientific.


    Click here to view all PoolLab reagents.

    • Bluetooth Equipped
    • Powerful App and Software
    • Free Cloud Space
    • 6 Buttons for direct Access
    • IP68 Waterproof
    • Fixed but changeable cuvette
    Learn More
  2. Pool eXact EZ Photometer

    The Pool eXact EZ has been updated to test an additional 3 parameters, Copper, Phosphate and Chloride.

    Maintain your pool water chemicals the safe and easy way with the Pool eXact®EZ! The slim, compact design is easy to use and is geared toward the consumer market.

    Learn More
  3. Chlorine + eXact EZ Photometer

    The Chlorine + eXact EZ tests 9 important water quality parameters and uses our patented eXact Strips, a quick and easy reagent system for analysis. Simply dip an eXact Strip into the water sample for 20 seconds using a gentle back and forth motion, discard the strip, and read the results when displayed. This photometer is NSF/ANSI 50 L1 Certified

    Learn More
  4. eXact Micro 20 Photometer with Bluetooth

    The eXact® Micro 20 with Bluetooth® SMART is a powerful dual-wavelength photometer system that harnesses the technology to connect wirelessly to your smart device. The dual narrow band wavelength filters ensure delivery of the most accurate results!

    Learn More
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