Range

0.0 to 99.9 ppm as NH₄⁺

Resolution

0.1 ppm

Accuracy @ 25°C/77°F

±1.0 ppm ±5% of reading

Light Source

LED @ 470 nm

Light Detector

silicon photocell

Method

adaptation of the ASTM Manual of Water and Environmental Technology D1426-92, Nessler Method. The reaction between ammonia and reagents causes a yellow tint in the sample.

Environment

0 to 50°C (32 to 122°F); RH max 95% non-condensing

Battery Type

(1) 1.5V AAA

Auto-off

after ten minutes of non-use

Dimensions

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

Weight

64 g (2.25 oz.)

Ordering Information

HI733 Checker® is supplied with (2) sample cuvettes with caps, ammonia reagent starter kit for 25 tests (1 bottle of HI733A-0 and 1 bottle of HI733B-0), battery, instructions and quick start guide