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The HI 761 Checker®HC is a simple, accurate, and cost effective way to measure ultra-low ranges of total chlorine. Designed as a more accurate alternative to chemical test kits, the HI 761 provides quick, accurate results in four easy steps.
The HI 761 uses an adaptation of the USEPA method 330.5. The reaction between the chlorine and DPD reagent causes a pink tint in the sample.
Order Information: The HI 761 Checker®HC is supplied with 2 cuvettes and caps, reagent starter kit (6 packets for total chlorine ultra-low range), 1 x 1.5V AAA battery, and an instruction manual.
Specification :
| Range | 0 to 500 ppb | |
| Resolution | 1 ppb | |
| Accuracy (@25°C/77°F) | ±5ppb ± 5% of reading | |
| Measurement Method | Colorimetric | |
| Light Source | Photodiode @525 nm | |
| Light Detector | Silicon photocell | |
| Method | Adaptation of the USEPA method 330.5. The reaction between the chlorine and DPD reagent causes a pink tint in the sample. | |
| Power Supply | Battery – 1 x 1.5V AAA | |
| Power Auto Off | After 10 min. of inactivity | |
| 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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Range 0:00 to 2:50 ppm | USEPA Method 330.5 / DPD | Resolution 0.01ppm
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Range 0:00 to 3:50 ppm | USEPA Method 330.5 / DPD | Resolution 0.01ppm
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Range 0.00 - 9.99 ppm NH3-N | Nessler Method | 0.01ppm resolution
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Range 0.0 - 8.0 ppm | DPD method | Resolution 0.1ppm
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Range 0:00 to 7:00 g / L | Photometric Method | Resolution 0.01g / L