Hanna HI771 Chlorine Checker Ultra High Range
The Hanna HI771 Chlorine Checker Ulra High Range is a high-performance handheld colorimeter designed for measuring ultra-high concentrations of chlorine in water with simplicity, speed, and accuracy. With a broad detection range of 0 to 500 ppm, this model is particularly ideal for industrial disinfection systems, cooling towers, wastewater treatment, and other applications requiring elevated chlorine levels.
By bridging the gap between basic test kits and advanced instrumentation, the HI771 offers laboratory-quality results in a compact, palm-sized format. It uses the colorimetric method to provide consistent and accurate chlorine readings through a quick and user-friendly process.
Key Features
Ultra High Range: Detects chlorine concentrations from 0 to 500 ppm, suitable for industrial and large-scale applications.
Digital Precision: Delivers ±3 ppm ±5% of reading accuracy at 25°C, removing subjectivity from color comparisons in chemical kits.
User-Friendly Design: Operated via a single button with clear digital readout on a large LCD screen.
LED Light Source with Silicon Photocell: Ensures accurate and repeatable measurements under all lighting conditions.
Battery Powered with Auto-Off: Uses a standard 1.5V AAA battery and shuts off automatically after 10 minutes of inactivity to preserve power.
Typical Applications
Water and Wastewater Treatment Plants
Cooling Tower Maintenance
Food and Beverage Processing
Industrial Water Disinfection Systems
Agricultural and Chemical Processing Facilities
Technical Specifications
| Parameter | Details |
|---|---|
| Range | 0 to 500 ppm |
| Resolution | 1 ppm |
| Accuracy @ 25°C | ±3 ppm ±5% of reading |
| Light Source | LED @ 525 nm |
| Light Detector | Silicon photocell |
| Method | Adaptation of Standard Methods for Water and Wastewater 4500-Cl |
| Power Supply | 1 x 1.5V AAA battery |
| Auto-Off | After 10 minutes of non-use |
| Operating Environment | 0 to 50°C (32 to 122°F); RH max 95% non-condensing |
| Dimensions | 81.5 x 61 x 37.5 mm (3.2 x 2.4 x 1.5”) |
| Weight | 64 g (2.25 oz.) |
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