Description
Features:
- Easier to use and more accurate than chemical test kits
- Phenanthroline method
- ±0.04 ppm ±2% of reading accuracy
- 0.01 ppm (mg/L) resolution (500 points)
- Large, easy to read digits
- Auto shut off
- Dedicated to a single parameter
- Designed to work with HANNA's powder reagents
- Uses 10 mL glass cuvettes
- Small size, big convenience
- Weighing a mere 64 g (2.25 oz.), the Checker®HC easily fits into the palm of your hand or pocket
- Use for quick and accurate on the spot analysis
- One button operation: zero and measure
- Operated by a single AAA battery
- Built-in timer
- 6-month warranty
Applications:
- Industrial
- Ground and treated waters
- Mining leachate monitoring
- Agricultural irrigation water
The HANNA HI 721 Checker®HC bridges the gap between simple chemical test kits and professional instrumentation. Chemical test kits are not very accurate and only give 5 to 10 points resolution while professional instrumentation can cost hundreds of dollars and can be time consuming to calibrate and maintain. The HANNA HI 721 Checker®HC is accurate and affordable with immediate results.
The new HI 721 Checker®HC portable handheld colorimeter features a resolution of 0.01 ppm (500 points) and ±0.04 ppm ±2% of reading accuracy. The HI 721 Checker®HC uses an adaptation of Standard Method 315 B.
The contoured style of this Checker®HC fits in your palm and pocket perfectly and the large LCD is easy to read. The auto shut-off feature assures the battery life will not be drained if you forget to turn it off.
The HI 721 Checker®HC is extremely simple to use. First, zero the instrument with your water sample. Next, add the reagent. Last, place the vial into the HI 721 Checker®HC, press the button and read the results. It's that easy.
Specifications:
| Range | 0.00 to 5.00 ppm (mg/L) |
| Resolution | 0.01 ppm (mg/L) |
| Accuracy @ 25°C | ±0.04 ppm ±2% of reading |
| Light Source | LED @ 525 nm |
| Light Detector | silicon photocell |
| Environment | 0 to 50°C (32 to 122°F); RH max 95% non-condensing |
| Battery Type | (1) 1.5V AAA |
| Auto-off | after three minutes of non-use and two minutes after reading |
| Dimensions | 81.5 x 61 x 37.5 mm (3.2 x 2.4 x 1.5) |
| Weight | 64 g (2.25 oz.) |
| Method | adaptation of the EPA Phenantroline method 315 B, for natural and treated waters. |
Additional Models:
| 90-2619-01 | Free Chlorine Checker®HC HI701 |
| 90-2619-02 | Total Chlorine Checker®HC HI 711 |
| 90-2619-03 | Free Phosphate Checker®HC HI 713 |
| 90-2619-04 | Free Iodine Checker®HC HI 718 |
| 90-2619-05 | Free Iron Checker®HC HI 721 |
| 90-2619-06 | Low Range Fluoride Checker®HC HI 729 |
| 90-2619-07 | Calcium Checker®HC HI 758 |
| 90-2619-08 | High Range Silica Checker®HC HI 770 |
| 90-2619-09 | Color of Water Checker®HC HI 727 |
| 90-2619-12 | Ultra Low Range Phosphorus Checker®HC HI 736 |
| 90-2619-13 | Alkalinity Checker®HC HI 755 |
| 90-2619-14 | Ultra Low Range Nitrite Checker®HC HI 764 |
| 90-2619-15 | High Range Phosphorus Checker®HC HI 706 |
| 90-2619-16 | High Range Nickel Checker®HC HI 726 |
| 90-2619-17 | High Range Phosphate Checker®HC HI 726 |
| 90-2619-18 | High Range Chromium VI Checker®HC HI 717 |
| 90-2619-39 | High Range Ammonia Checker®HC HI 733 |
| 90-2619-60 | Low Range Ammonia Checker®HC HI 700 |
| 90-2619-90 | Ultra High Range Total Chlorine Checker®HC HI 771 |
| 90-2619-93 | Ultra Low Range Total Chlorine Checker®HC HI 761 |
Supplied With:
- HI 721 Checker®HC
- sample cuvettes with caps (2)
- Powder reagents for iron (6)
- Battery
- Instructions