- Easier to use and more accurate than chemical test kits
    Ascorbic acid method
    ±5 ppb ±5% of reading accuracy
    Large, easy to read digits
    Auto shut off
- Dedicated to a single parameter
    Designed to work with HANNA’s 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
    Single button operation: zero and measure
    Operated by a single AAA battery
- Ideal for aquaculture (marine applications)
Phosphorus concentration in water is monitored because it causes corrosion when present in levels too high.
The HANNA HI 736 Checker®HC bridges the gap between simple chemical test kits and professional instrumentation. The HANNA HI?736 is both accurate and affordable.
The HI 736 Checker®HC portable handheld colorimeter features a resolution of 1 ppb and ±5 ppb ±5% of reading accuracy and uses an adaptation of Standard Method Ascorbic Acid.
The HI 736 Checker®HC is extremely simple to use. First, zero the instrument with your water sample. Next, add the reagents. Last, place the vial into the Checker®HC, press the button and read the results. It’s that easy.
Spesification :
 
| Range | 0 to 200 ppb | |
| Resolution | 1 ppb | |
| Accuracy @ 25°C | ±5 ppb ±5% 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 two minutes of non-use and ten seconds 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 Standard Methods for the Examination of Water and Wastewater, 20Th edition, Ascorbic Acid method. | 
 
