• CS100

The simplest, portable method for accurate measurements of free and total chlorine - with USEPA approval.

The revolutionary ChloroSense boasts unique sensor technology - developed specifically for measuring free and total chlorine. Designed for field analysis, the instrument is portable, waterproof and battery powered.

  • Simple and rapid measurement process – fill the sample vessel, insert the sensor then close the lid - in less than one minute results for free and total chlorine are available
  • No reagents and no glassware – ideal for food processing applications
  • Waterproof USB connection – for instrument settings, software update and data download of results log.

The benefits of sensor technology

Sensor technology offers significant advantages compared to alternative measurement techniques. Simple measurement techniques coupled with state-of-the-art electronic instruments ensure even the lowest concentrations can be determined with confidence. Suitable for even the most difficult samples, the sensor technique is not affected by solids or sample colour.

Simple test method

Fill the sample container, insert the sensor and close the lid is often all that is required.

Waterproof USB connection

Download data sets for traceability and data management. These instruments also feature self-diagnostic functionality and automatic selection and performance of test methods.

Sensor Electrodes

At the heart of Palintest Sensor Technologies are the pre-calibrated, single-use, disposable electrodes incorporating a patented micro-electrode array. Reagents are embedded in the electrode, meaning no reagent preparation steps for the operator, and ensuring precise control of the measurement process is achieved in any situation.

The benefits of sensor technology
Simple test method
Waterproof USB connection
Sensor Electrodes


Measuring System Chronoamperometry
Ranges 0 – 10 mg/L free chlorine, 0 – 100 mg/L total chlorine
Display High clarity LCD with backlight
User Interface English, French, Spanish, German and Italian language options
Connectivity USB-B
Data Storage 500 results including date, time, test ID and sample ID
Size (WxLxH) and Weight 170 x 126 x 116 mm, 975g (including batteries)
Power Supply 4x AA batteries


Select a consumable type to view details and download the related instruction and safety sheet documents for consumables


Additional Information

Part Code Contents
CS100 ChloroSense instrument, USB cable, CS sensors (x100) including calibration chip, sample bottle, Check Standards and instructions. Supplied in a protective shoulder case.
CS180 ChloroSense Check Standards

Instructions & Brochures

ChloroSense User Manual

Download the instrument instructions.


Sensor Technology Brochure

Download the Brochure to view the full range of Sensor Technology solutions.


Research & Insights

Chlorine alternatives in Fresh Produce production

Understanding your disinfectant – the switch from chlorine to chlorine dioxide in the production of fresh produce.


Controlling chloramination in drinking water

Dr Palin developed the DPD method of measuring free and total chlorine in the 1950’s and described at the time how the colorimetric method can suffer from interference from monochloramine during free chlorine readings.


Free and combined chlorine - understand the difference

Testing the water for both free and combined chlorine allows you to know whether the water you've chlorinated is of sufficient quality to drink or disinfect your process, depending upon your application.


Testing free chlorine when superchlorinating

In some applications, like fresh produce washing, regulations stipulate that free chlorine must be applied to the water at a concentration greater than 50mg/l.


Water Testing in Renal Dialysis

Chloramine testing of water used for haemodialysis is mandatory as prescribed in ISO 13959:2014. The standard refers to testing for total chlorine, however understanding the difference between free chlorine and combined chlorine can help when making the decision as to which test method to use.


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