Portable colorimetric dissolved oxygen meter which takes measurements using a modified Winkler method. In operation the sample is placed in a cuvette provided. The cuvette with sample is inserted into the meter and the zero key selected to calibrate the meter. Then accessory reagents are added drop-wise to the sample to generate the colour for reading. The intensity of the colour is dependent on the dissolved oxygen level. Readings are unaffected by the temperature change, salinity or probe health factors normally affecting polarographic measurement systems.

• Easy to operate
• Low cost per test
• Maintenance free system
• Long life LED light source operating at 430nm
• Battery operated, with auto shut-off after 10 minutes

With 60ml capacity BOD sample bottle, two cuvettes, 3 x 1.5V AA batteries and instructions. Without reagents.