Colorimeters C101


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Eutech’s latest range of laboratory grade microprocessorbased portable waterproof colorimeters measure Chlorine (Free and Total), Cyanuric Acid, pH, Chlorine Dioxide, Bromine and Ozone with quick, accurate and repeatable results. The meters are easy to use because of their simple, intuitive and direct user interface. Guiding messages and self-diagnostics are displayed on a large custom-made liquid crystal display (LCD). Each meter comes with reagents and sample vials ina rugged carrying case for swift testing on the go. This family of colorimeters is designed for reliable and convenient water analysis in swimming pools, spas, public utilities, industrial wastewater plants, municipal water, treated water, water conditioning systems and paper and pulp mills. Select from our wide range of models, designed to meet your application needs.

Product Features

:: Excellent test-to-test repeatability, auto-ranging and convenient
The meters ensure excellent test-to-test repeatability and have autoranging
capabilities while using only one-vial-one-sachet per test.
:: Fuss-free meter operations
Designed for utmost convenience (to be maintenance-free), the meters 
allow one-time blanking for all parameters and ranges. This value-added 
feature comes in handy when performing multi-parameter analysis and/or repeat measurements of a sample. The blanking value is stored in memory and retained not only if the meter is switched off, but even
if batteries are replaced. Furthermore, no pre-calibration is needed for
chlorine and cyanuric acid.
:: No detachable parts, no flip covers
The meters are designed such that the high-quality customised vials fit
perfectly into the sample well. Consequently, no detachable light shields
or flip covers are required.
:: US EPA-approved DPD method
Chlorine measurements are based on the US EPA-approved DPD method,
so the results can be reliably used for reporting purposes (subject
to local regulatory guidelines).
:: High quality reagents 
Custom-formulated powder reagents provide excellent accuracy, repeatability
and stability. They are conveniently packed in properly sealed
individual sachets for ease of use.
:: Advanced power management 
The meters are capable of more than three thousand tests on a set of four new ‘AAA’ alkaline batteries. The auto power-off function activates after ten minutes of non-use to conserve battery life.
:: Waterproof and lightweight
The lightweight meters have a waterproof IP67-rated housing. They float if accidentally dropped in water.



Swimming Pools l Spas l Drinking Water l Public Utilities l Wastewater l Treated water



Product Specification

Measurement Method Photometric
Light Source Light Emitting Diode (LED)
Wavelength 525nm
Detector Silicon photodiode
Absorbance Range 0 - 2.5 Abs
Photometric Precision ±0.0015Abs
Automatic Range Selection 0 - 1.99 ppm (Free & Total Chlorine)
2.0 - 6.0 ppm (Free & Total Chlorine)
5 - 90 ppm (Cyanuric Acid)
5.9 - 8.2 pH
0 – 3.79 ppm (Chlorine Dioxide)
3.8 – 11.4 ppm (Chlorine Dioxide)
0 – 4.49 ppm (Bromine)
4.5 – 13.5 ppm (Bromine)
0 – 1.39 ppm (Ozone)
1.4 – 4.1 ppm (Ozone)

0.01 ppm (0 - 1.99 ppm; Free & Total Chlorine)
0.1 ppm (2.0 - 6.0 ppm; Free & Total Chlorine) 
0.1 pH (5.9 - 8.2 pH)
1 ppm (5 - 90 ppm; Cyanuric Acid)
0.01 ppm (0 – 3.79 ppm; Chlorine Dioxide)
0.1 ppm (3.8 – 11.4 ppm; Chlorine Dioxide)
0.02 ppm (0 – 4.49 ppm; Bromine)
0.2 ppm (4.5 – 13.5 ppm; Bromine)
0.01 ppm (0 – 1.39 ppm; Ozone)
0.1 ppm (1.4 – 4.1 ppm; Ozone)


±0.02 ppm (0 – 1.99 ppm; Free & Total Chlorine)
±0.2 ppm (2.0 – 6.0 ppm; Free & Total Chlorine)
±0.1 pH (5.9 – 8.2 pH) 
±4 ppm; Cyanuric Acid
±0.02 ppm (0 – 3.79 ppm; Chlorine Dioxide)
±0.2 ppm (3.8 – 11.4 ppm; Chlorine Dioxide)
±0.03 ppm (0 – 4.49 ppm; Bromine)
±0.3 ppm (4.5 – 13.5 ppm; Bromine)
±0.02 ppm (0 – 1.39 ppm; Ozone)
±0.2 ppm (1.4 – 4.1 ppm; Ozone)

Calibration Points User selectable; 1 point per colorimetric test
Display 4-digit 14-segments customized liquid crystal display with annunciators
Sample Cells Borosilicate glass with screw caps, fill line and indexing mark Height x Diameter : 51 x 25 mm
Sample Volume Required 10 ml
Operating Temperature Range 0 – 50°C
Operating Humidity Range 0-90% RH non-condensing at 30°C
Power Supply 4 ‘AAA’ alkaline batteries
Battery Life > 3000 tests
Electromagnetic EN 61326 Compliance (EMC)
Weight Instrument : 200g
Complete carrying case : 1.25kg
Dimensions Instrument : 
6.8(W) x 15.5(L) x 4.6(H) cm
Carrying case : 16(W) x 35(L) x 12(H) cm


Order Information

Order No.

EC-C401 Waterproof Free Chlorine, Total Chlorine, Cyanuric Acid & pH Colorimeter Kit Set with reagents (94X377001, 94X377002, 94X377003 & 94X377004) and carrying case
EC-C301 C301 Free/ Total Chlorine/ pH
EC-C201 C201 Free / Total Chlorine
EC-C105 C105 Ozone Colorimeter
EC-C104 C104 Bromine Colorimeter
EC-C103 C103 Chlorine Dioxide
EC-C102 C102 Cyanuric Acid Colorimeter
EC-C101 C101 pH Colorimeter
94X377001 Free Chlorine (DPD) Reagent Kit, pack of 100 pouches
94X377002 Total Chlorine (DPD) Reagent Kit, pack of 100 pouches
94X377003 Cyanuric Acid Reagent Kit, pack of 100 pouches
94X377004 pH Indicator (Phenol Red) Reagent Kit, 1 bottle
94X377005 Chlorine Dioxide (Glycine) Reagent
ECCLCOLORREF Colour Reference Kit (Chlorine, Free;
Chlorine, Total; Bromine; Ozone;
Chlorine Dioxide)