COLO.Science — WATER QUALITY / CHLORINE TESTING — CHLTEST20
CHLTEST20 Portable Chlorine Multi-parameter Tester
CHLTEST20 Portable Chlorine Multi-parameter Tester is a compact water-quality instrument for field and laboratory measurement of residual chlorine, total residual chlorine and chlorine dioxide. The tester uses the DPD colorimetric method, supports LCD readout, USB data transfer, data storage for up to 5000 records and optional portable thermal printing. With a carrying case for the instrument and reagents, CHLTEST20 is suitable for indoor and outdoor chlorine testing workflows.
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COLO.SCIENCE — PORTABLE CHLORINE AND WATER DISINFECTION TESTING
Portable chlorine tester for residual chlorine, total chlorine and chlorine dioxide
The CHLTEST20 Portable Chlorine Multi-parameter Tester is designed for quick and practical water disinfection checks in field and laboratory environments. It measures residual chlorine, total residual chlorine and chlorine dioxide using a DPD colorimetric method with pre-set standard curves for stable and repeatable readings.
The instrument supports battery operation and AC power, stores up to 5000 data records and can transfer data through USB. With a portable carrying case for the instrument and reagents, CHLTEST20 is suitable for drinking water, process water, pools, sanitation checks, environmental water testing and on-site service inspections.
Key benefits
- Portable chlorine multi-parameter tester for residual chlorine, total residual chlorine and chlorine dioxide.
- DPD method with preset standard curve for stable and practical colorimetric measurement.
- Residual chlorine and total residual chlorine range: 0.02–15 mg/L.
- Chlorine dioxide range: 0.02–5 mg/L.
- 5000 data records with USB transfer to computer.
- Optional portable thermal printer for current and historical measurement data.
- IP67 protection and portable case for field and indoor work.
Suitable for
- Drinking water and municipal water disinfection checks.
- Residual chlorine monitoring in field inspections.
- Total residual chlorine verification in treated water.
- Chlorine dioxide checks in water treatment and sanitation workflows.
- Pool, spa, service and hygiene-control applications.
- Process water testing and routine water-quality documentation.
- Mobile QA/QC teams that need a compact tester with data storage.
TECHNICAL SPECIFICATIONS — CHLTEST20 PORTABLE CHLORINE MULTI-PARAMETER TESTER
| Model | CHLTEST20 |
| Product type | Portable chlorine multi-parameter tester |
| Measured parameters | Residual chlorine, total residual chlorine and chlorine dioxide |
| Measuring method | Absorbance / DPD colorimetric method |
| Absorbance range | 0–2.5 Abs |
| Residual chlorine range | 0.02–15 mg/L |
| Total residual chlorine range | 0.02–15 mg/L |
| Chlorine dioxide range | 0.02–5 mg/L |
| Optical stability | <0.005 A / 20 min |
| Accuracy | ΔV ≤ ±10% |
| Repeatability | ≤ ±5% |
| Number of curves | 5 |
| Data storage | 5000 records |
| Test tube | 25 mm colorimetric tube |
| Light source | Light emitting diode / LED |
| Spectral wavelength | 528 nm |
| Spectral bandwidth | 15 nm |
| Display | LCD screen |
| Data transfer | USB |
| Printer | Portable thermal printer, optional |
| Environmental 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 consumption | 0.3 W |
| Standard accessories | Set of 4 cuvettes |
| Net / gross weight | 0.3 kg / 0.5 kg |
Final analytical performance depends on reagent quality, cuvette condition, calibration, sample matrix, operator procedure and measurement environment. Reagents, printer and accessories should be confirmed in the official quotation.
DPD method, calibration and data management
DPD colorimetric testing
CHLTEST20 uses a DPD method for chlorine-related water testing. The instrument is designed for residual chlorine, total residual chlorine and chlorine dioxide, supporting practical measurement in field and laboratory workflows.
Calibration function
The calibration function can calculate and store a curve according to standard samples. This reduces the need to manually prepare curves and allows curve parameters to be adjusted where the method requires it.
Data storage and USB
The tester stores up to 5000 data records and supports USB upload to a computer, helping users document water disinfection checks and routine chlorine monitoring results.
Portable printing option
CHLTEST20 can be connected to an optional portable thermal printer to print current and historical data, useful for service documentation and field reporting.
COLO.SCIENCE PORTABLE CHLORINE TESTING
Portable tester with carrying case for instrument and reagents
CHLTEST20 is supplied as a portable chlorine testing instrument for use in different indoor and outdoor environments. The product information describes a carrying case for the instrument and professional consumable reagents, while the standard accessory list includes a set of four cuvettes. The final supply package should be confirmed in the official quotation.
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COLO.SCIENCE VIDEO
Video presentation for CHLTEST20 is in preparation
The video will present portable chlorine testing, DPD reagent workflow, sample handling, LCD reading, data storage, USB transfer and field use of the CHLTEST20 portable chlorine tester.
COLO.SCIENCE KNOWLEDGE
Learn more about laboratory and field water-quality testing
Explore COLO.Science content about water-quality instruments, photometric testing, chlorine monitoring, electrochemistry, disinfection control and routine laboratory workflows.
Applications and laboratory value
Drinking water checks
CHLTEST20 supports routine measurement of chlorine-related parameters in drinking water and treated water where disinfectant residuals need to be checked quickly.
Field inspection
Battery operation, compact dimensions, carrying case and IP67 protection make the tester suitable for outdoor and mobile water-quality inspection workflows.
Sanitation and service work
The tester can support service teams checking residual disinfectants in water systems, sanitation applications and operational control points.
Data documentation
With 5000 stored records, USB transfer and optional printing, CHLTEST20 helps document current and historical water testing results.
How to select the right configuration and reagents
When selecting the CHLTEST20 portable chlorine multi-parameter tester, the final configuration should be matched to the required chlorine parameter, expected concentration range, reagent availability, reporting workflow and field or laboratory use case. Residual chlorine, total residual chlorine and chlorine dioxide applications may require different reagent procedures and quality-control routines.
COLO.Science can help confirm the suitable tester configuration, reagent package, cuvettes, data transfer needs, optional printer and carrying case arrangement so the supplied package matches the measurement workflow and official quotation.
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. This webpage is provided for general product presentation and may not represent the exact delivered configuration. Specifications may change without prior notice.
