Range

0.00 to 5.00 ppm (mg/L)

Resolution

0.01 ppm (mg/L)

Accuracy @ 25°C/77°F

±0.04 ppm ±2% of reading

Light Source

LED @ 525 nm

Light Detector

silicon photocell

Method

adaptation of the EPA Phenanthroline method 315 B, for natural and treated waters

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

81.5mm x 61mm x 37.5mm (3.2" x 2.4" x 1.5”)

Weight

64 g (2.25 oz.)

Ordering Information

HI721 Checker® is supplied with (2) sample cuvettes with caps, iron reagent starter kit for 6 tests (6 powder reagent packets), battery, instructions and quick start guide.