Since 1919
LaMotte Smart2 Colorimeter
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Individual Test Kits:

Oxygen, Dissolved (Individual Test Kits)

Oxygen, Dissolved: The azide modification of the Winkler method is a modified iodometric titration whereby oxygen, in the presence of a strong alkali, oxidizes manganese, which in turn reacts with iodide to form iodine. This is titrated with a standard thiosulfate solution in the presence of a starch indicator to enhance the endpoint. Azide eliminates nitrite interference.

Order Code/Model
Test System
Range/Sensitivity
# of Tests
(# Reagents)
Shipping Code (Weight/lbs)

7414†
EDO

Globe Approved

Advanced Placement

Direct Reading Titrator

0–10 ppm/0.2 ppm O2

50 at 10 ppm (5)

R3 (2)

5860 All liquid reagents
Direct Reading Titrator
0–10 ppm/0.2 ppm O2 50 at 10 ppm (5)

R1 (2)

5889 TesTabs®
Color Chart
0.0, 4.0, 8.0 ppm O2 100 (1) NH (1)
Shipping Codes & Weight:

Shipping codes and weights for shipping are included in this catalog for your convenience. The shipping code will refer to one of the following in the chart below. Weight will be in pounds and enclosed in ( ).

Direct Reading Titrators have a specific range, but may be refilled to test higher concentrations.

*(NPDWR) EPA Accepted
†(NPDES) EPA Accepted


LaMotte Company

P.O. Box 329 | 802 Washington Avenue | Chestertown | Maryland | 21620
Tel: 800-344-3100 (within the U.S.A.) | 410-778-3100 | 410-778-3101
Fax: 410-778-6394