COLO.Science · Technical Specification
CHLTEST20
Portable Chlorine Multi-parameter Tester · Residual Chlorine / Total Residual Chlorine / Chlorine Dioxide
CHLTEST20 Portable Chlorine Multi-parameter Tester is a compact water-quality instrument for measurement of residual chlorine, total residual chlorine and chlorine dioxide. It uses the DPD colorimetric method with LCD display, USB data transfer, calibration curve function and portable field use support. The instrument is suitable for water disinfection checks, service inspections, sanitation control and routine laboratory or field water testing.
Portable testerResidual chlorineTotal chlorineChlorine dioxideDPD method528 nm LEDLCDUSB5000 recordsIP67
CHLTEST20 · portable chlorine tester for residual chlorine, total chlorine and chlorine dioxide
ModelCHLTEST20
Portable tester
Portable tester
Address / HQPolje ob Sotli 4
SI-3255, Slovenia
SI-3255, Slovenia
Contactsales@colo.si
+386 64 222 724
+386 64 222 724
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CHLTEST20 · Portable Chlorine TesterTechnical data sheet · Informational document
Main website: colo.si
Main website: colo.si
CHLTEST20 · technical specificationPortable tester for residual chlorine, total residual chlorine and chlorine dioxide
Residual chlorine 0.02–15 mg/LTotal chlorine 0.02–15 mg/LClO₂ 0.02–5 mg/LIP67- Compact water-disinfection tester for field and laboratory workflows
Product Overview
Application profile
Water disinfection: designed for residual chlorine, total residual chlorine and chlorine dioxide testing.
Portable workflow: compact dimensions, carrying case concept and battery operation support indoor and outdoor use.
Routine checks: suitable for drinking water, treated water, process water, sanitation checks and service inspections.
Photometric method: DPD colorimetric detection with LCD reading and stored standard curve support.
Design and handling advantage
LCD display: clear readout of measurement data during routine water testing.
Convenient detection: portable case and consumable reagents support field and laboratory use.
Calibration function: curve calculation and storage can be performed according to standard samples.
Power saving: automatic shutdown after 10 minutes without operation reminder.
Key features
Multi-parameter chlorine testing: residual chlorine, total residual chlorine and chlorine dioxide.
Data storage: stores up to 5000 pieces of data.
USB communication: supports upload of stored data to a computer.
Optional printing: compatible with portable thermal printer for current and historical data.
IP protection: IP67 rating for demanding portable use.
MethodDPD colorimetric
Wavelength528 nm LED
Storage5000 records
ProtectionIP67
Measurement indexes
Residual chlorine: 0.02–15 mg/L.
Total residual chlorine: 0.02–15 mg/L.
Chlorine dioxide: 0.02–5 mg/L.
Absorbance mode: 0–2.5 Abs.
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Measurement and Optical Specifications
Measured indexes
| Index | Measuring range | Method / notes |
|---|---|---|
| Residual chlorine | 0.02–15 mg/L | DPD colorimetric workflow |
| Total residual chlorine | 0.02–15 mg/L | DPD colorimetric workflow |
| Chlorine dioxide | 0.02–5 mg/L | Water disinfection control |
| Measuring mode | Absorbance | 0–2.5 Abs |
| Accuracy | ΔV ≤ ±10% | Method and sample dependent |
| Repeatability | ≤ ±5% | Under appropriate test conditions |
| Number of curves | 5 | Curve function supported |
| Calibration function | Can calculate and store the curve according to standard samples; curve parameters can be changed. | |
Method note
Reagents: correct DPD reagent handling, blanking and clean cuvettes are essential for repeatable results.
Sample matrix: colour, turbidity, oxidants and handling time may influence practical chlorine readings.
Optics and photometric system
| Parameter | Specification | Notes |
|---|---|---|
| Optical stability | <0.005 A / 20 min | Instrument stability reference |
| Light source | Light Emitting Diode | LED source |
| Spectral wavelength | 528 nm | Colorimetric chlorine workflow |
| Spectral bandwidth | 15 nm | Optical bandwidth |
| Test tube | 25 mm colorimetric tube | Use clean tubes for reliable readings |
| Display screen | LCD | Measurement data display |
| High precision note | The standard curve has been set; measurement results are designed to be accurate and stable when the method is followed. | |
Practical detection note
Field use: the instrument is intended for convenient indoor and outdoor detection with carrying case and professional reagents.
Documentation: stored results can be uploaded to a computer through USB for routine reporting.
Absorbance0–2.5 Abs
Wavelength528 nm
Bandwidth15 nm
Data handling and operation
Storage: up to 5000 data records for routine documentation.
Transfer: USB upload to computer; optional portable thermal printer for current and historical data.
Power saving: automatic shutdown after 10 minutes without operation reminder.
Technical values are provided for product selection and orientation. Reagent package, calibration routine, optional printer and accessory configuration should be confirmed through the official COLO.Science quotation or manufacturer-confirmed offer.
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Power, Environmental Conditions, Supply and Applications
Power, dimensions and environment
| Parameter | Specification |
|---|---|
| Working conditions | 0–50 °C, ≤85% RH |
| IP protection | IP67 |
| Dimensions | 160 × 70 × 35 mm |
| Power supply | 4 × AA / LR6 batteries and 8.4 V power adapter (220 V) |
| Power support | Battery power and AC power support |
| Power consumption | 0.3 W |
| Net / gross weight | 0.3 kg / 0.5 kg |
Operation summary
LCD workflow: simple operation and direct display of measurement data.
Data workflow: storage, USB transfer and optional printing are summarized on Page 3.
Portable use: battery support and IP67 protection support field operation.
Standard and optional supply
| Item | Details |
|---|---|
| Standard accessories | Set of 4 cuvettes |
| Carrying case | Carrying case for instrument and reagents described in product features |
| Consumable reagents | Professional consumable reagents; final set to be confirmed in quotation |
| Optional printer | Portable thermal printer for current and historical data |
| Power accessories | Battery operation and 8.4 V power adapter support |
Why CHLTEST20
Three chlorine-related indexes: residual chlorine, total residual chlorine and chlorine dioxide in one portable tester.
Field-ready workflow: compact dimensions, LCD readout, IP67 protection and portable carrying case concept.
Data workflow: 5000 stored records, USB transfer and optional printer for documentation.
Calibration support: stored curve parameters help standardize routine measurements.
Typical applications
Drinking water: residual disinfectant checks in treated water systems.
Sanitation and service: quick chlorine checks during maintenance and inspection work.
Process water: routine chlorine monitoring in industrial and facility workflows.
Field testing: portable measurements where instrument, reagents and documentation must travel together.
Configuration notice
Reagents, printer, carrying case contents and accessories may vary by quotation and application. The official offer defines the final scope of supply.
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COLO.Science · Selection and quotation supportSelection and Use Notes
For chlorine monitoring
Parameter choice: confirm whether residual chlorine, total residual chlorine or chlorine dioxide is required.
Range check: verify that expected sample concentrations fit the stated measuring ranges.
For DPD workflow
Reagents: select the correct reagent set and shelf-life management for the intended method.
Cuvettes: use clean 25 mm colorimetric tubes and consistent sample handling.
For reporting
Data: USB transfer and 5000 stored records support routine documentation.
Optional printer: add portable thermal printer where on-site printed records are needed.
Configuration notice
Portable chlorine testers may be delivered with different reagent sets, cuvettes, printer options, carrying case contents and accessories depending on the selected application and quotation. The official quotation defines the final scope of supply. Website and technical-sheet content is provided for general product presentation and may not represent the exact delivered configuration. Specifications may change without notice.
Manufacturer and support
COLO Lab Experts
Polje ob Sotli 4, SI-3255, Slovenia
Selection guidance: Send the target chlorine parameter, expected measuring range, sample type, reagent requirements, reporting workflow and field/laboratory use case. COLO.Science can help confirm the correct CHLTEST20 configuration and accessory set for your measurement workflow.
Quick contact
COLO.Science · CHLTEST20 portable chlorine tester support
Need help selecting the correct chlorine testing configuration?
Send the target analyte, expected concentration range, sample matrix, reporting needs and preferred accessories. COLO.Science can support CHLTEST20 product selection, reagent confirmation and quotation preparation.
Disclaimer: Technical specifications, images and descriptions are provided for product identification and preliminary selection only. They do not replace an official manufacturer datasheet, validated quotation or contract specification. Final supplied configuration may differ depending on selected reagents, accessories, printer option, stock status and regional availability. Values are subject to change without prior notice.
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