Envco – Environmental Equipment

The C401/301/201/101/102/103/104/105 Colorimeter series allows you to measure up to seven parameters - namely the Free Chlorine, Total Chlorine, Cyanuric Acid, pH, Chlorine Dioxide, Bromine and Ozone of an aqueous sample in the field.

Colorimetry Analysis
Disinfection effectiveness depends on your system’s overall water chemistry, and not just on the disinfectants’ concentrations alone. The following section provides a brief overview on the measurement of each parameter:

1. Chlorine
Chlorine and Chlorine-released compounds are common sanitizers for swimming pools, drinking water and other water treatment systems. The disinfection efficiency is a direct function of the level of free Chlorine in a system; Total Chlorine is the sum of Free Chlorine and Combined Chlorine.

Water disinfected by Chlorine can sometimes emit a strong pungent smell. Contrary to popular thoughts, this smell is caused by insufficient, not too much, Free Chlorine. While sufficient Chlorine is necessary to keep pathogens and unpleasant smells at bay, it is essential that the right amount is present. Too little Chlorine decreases disinfectant efficiency; too much Chlorine poses as a health hazard.

2. Cyanuric Acid
Cyanuric Acid is often present as a stabilizer in applications where Chlorine is used for disinfection. Low levels of Cyanuric Acid are beneficial as they prevent wastage of Free Chlorine by the sun’s UV rays. However, too much Cyanuric acid can cause the Chlorine to take a longer time to kill the micro-organisms.

It is important to test your water sample and determine how much Cyanuric Acid should be added to maximize Chlorine efficiency. Cyanuric Acid build-up is uncommon with proper pool maintenance.

3. Bromine
Bromine is comparatively less reactive than Chlorine due to its high boiling point, making it more stable as a disinfectant, but at the same time, unsuitable for outdoor use. As a disinfectant, Bromine has many advantages over chlorine – it has fewer odors, and is less likely to cause eye and skin irritations. In addition, Bromine remains effective at high temperatures and its disinfecting efficiency is not affected by pH fluctuations.

The disadvantages are that Bromine is more expensive than Chlorine and it cannot be stabilized for outdoor use.

4. Ozone
Ozone is one of the strongest and most rapid sanitizers available. It is odorless, does not cause eye or skin irritations, and does not pose as a health hazard. However, Ozone is highly unstable and generally dissipates within five minutes of introduction to the water. Hence, despite its ability to purge pathogens, Ozone should be used with another disinfectant to create sanitizer residual in the water.

5. Chlorine Dioxide
Despite its chemical name, Chlorine Dioxide is not considered as a Chlorine-based disinfectant, and does not release Free Chlorine. However, it is a strong oxidizer and performs oxidation very cleanly when introduced in small amounts.

The use of Chlorine Dioxide as a disinfectant is seeing growth in many industrial applications. Unlike Chlorine, Chlorine Dioxide is remains as a true gas when dissolved in water. The lack of significant reaction of Chlorine Dioxide with water is partly responsible for its retaining its disinfecting effectiveness over a wide pH range. This property makes it a logical choice for cooling systems operated in the alkaline pH range, or cooling systems with poor pH control. Other applications for Chlorine Dioxide includes the food processing industry, the pulp and paper industries and the potable water and waste water treatment industries.

6. pH
pH affects the amount of free Chlorine that is formed, and therefore determines the effectiveness of Chlorine as a disinfectant. As pH increases, the disinfecting power of Chlorine decreases. High pH causes scaling of water surfaces, pipework and fittings; this may result in cloudy water. Low pH can corrode metals in pipeworks and fittings; this may cause metal oxides to stain water surfaces.

Product Features
• Excellent repeatability, auto-ranging and easy to use
The meter ensures excellent repeatability, has auto-ranging capabilities while using only one-vial-one-sachet per test.

• High Quality Reagents
The custom-formulated reagents provide excellent accuracy, repeatability and stability. They are conveniently packed for ease of use.

• USEPA-approved DPD method*
Chlorine measurements are based on the USEPA-approved DPD method*.

• Advanced Power Management
The meter is capable of measuring more than 3,000 tests using a single set of 4 ‘AAA’ alkaline batteries. Auto power-off activates after 10 minutes of non-use to conserve battery life.

• Fuss-free Meter Operation
The meter is designed for easy operation. It allows one-time blanking for all parameters and ranges when measuring the same sample. The blanking value is stored in memory even if batteries are replaced. Furthermore, no calibration is needed for Chlorine and Cyanuric Acid. Most importantly, the meter is maintenance-free.

• Large Easy-to-read Display
The large screen features 4-digit 14-segment customized liquid crystal display (LCD) with mode indicators to guide meter use.

• IP67 waterproof and lightweight
The lightweight meter has a waterproof IP67-rated housing. It even floats when accidentally dropped in water.

C 401; C 301; C 201
Free Chlorine & Total Chlorine (0 – 6.0 ppm)
The complete solution for your pool measurement needs! Eutech’s C 401 allows you to measure Free Chlorine, Total Chlorine, Cyanuric Acid and pH all with one meter. The DPD Method is US EPA-accepted for reported drinking water analyses (Free and Total Chlorine) and wastewater analyses (Total Chlorine only).
• C 401 measures Free Chlorine, Total Chlorine, Cyanuric Acid and pH
• C 301 measures Free Chlorine, Total Chlorine and pH
• C 201 measures Free Chlorine and Total Chlorine
C 102
Cyanuric Acid (5 – 90 ppm)
Designed for fuss-free, accurate measurement of Cyanuric Acid, Eutech’s auto-ranging C 102 Colorimeter is user-friendly, intuitive and requires no pre-calibration.
C 104
Bromine (0 – 13.5 ppm)
Measuring Bromine on-the-go is a breeze with Eutech’s C 104 colorimeter. Non-carcinogenic DPD Method with special-formulated reagent powder ensures accurate results with excellent repeatability.
C 105
Ozone (0 – 4.1 ppm)
Instant, accurate Ozone measurements in just three quick, easy steps! Eutech’s C 105 colorimeter uses non-carcinogenic DPD Method for Ozone measurement, and comes complete in a kit form with single-test reagent sachets and sample vials.
C 103
Chlorine Dioxide (0 – 11.4 ppm)
Whether it’s one-time measurement or multiple testing, Chloride Dioxide measurement is easy with Eutech’s C 103 colorimeter. User-friendly and convenient to use, all it takes is three simple steps to obtain accurate Chlorine Dioxide measurements – no pre-calibration required!
C 101
pH (5.9 – 8.2 pH)
Powered by advanced microprocessor technology, Eutech’s C 101 colorimeter is self-diagnostic to warn of irregularities in the detector

Ordering Information
EC-C401 Waterproof Free Chlorine, Total Chlorine, Cyanuric Acid & pH Colorimeter Kit Set with reagents & carrying case
EC-C301 Waterproof Free Chlorine, Total Chlorine & pH Colorimeter Kit Set with reagents & carrying case
EC-C201 Waterproof Free Chlorine & Total Chlorine Colorimeter Kit Set with reagents & carrying case
EC-C101 Waterproof pH Colorimeter Kit Set with reagents & carrying case
EC-C102 Waterproof Cyanuric Acid Colorimeter Kit Set with reagents & carrying case
EC-C103 Waterproof Chlorine Dioxide Colorimeter Kit Set with reagents & carrying case
EC-C104 Waterproof Bromine Colorimeter Kit Set with reagents & carrying case
EC-C105 Waterproof Ozone Colorimeter Kit Set with reagents & carrying case
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 Glycine (DPD) Reagent Kit, pack of 100 sachets (Used as Chlorine Dioxide Reagent)
ECTN100CUVKT Pack of 3 Sample Cuvettes (for TN100IR & Colorimeter series)
ECCLCOLORREF Chlorine Colour Reference Kit Set for C401, C301, C201, C103, C104, C105