Attention Users of Dissolved Oxygen Analyzers MARK-403

Attention Users of Dissolved Oxygen Analyzers MARK-403!

In 2017, the service life expired for all dissolved oxygen analyzers MARK-403 produced by LLC "VZOR" before they were discontinued in March 2007.

Consequently, starting from January 2018, the production of dissolved oxygen sensors DK-402M, which are part of the MARK-403 and MARK-402 devices, will be terminated.

Although a small reserve of sensors will be kept in stock for emergency situations, we strongly recommend planning to replace your outdated instruments with the modern model MARK-409T.

Key Advantages of the Dissolved Oxygen Analyzer MARK-409T:

- A practically maintenance-free, mechanically robust sensor:
  - Accuracy improved almost threefold / measurement error ± (0.001 + 0.035C, where C is the measured value)
  - Automatic gradation according to atmospheric oxygen no more than once per month
  - Membrane replacement not more frequently than every 6/12 months
  - Not affected by air entrapment, can be stored indefinitely in open air
  - Sample flow rate ranges from ultra-low (25 ml/min) to high (1500 ml/min)

Additional Information:

- The MARK-409T analyzer is included in the Russian State Register of Measuring Instruments (GR SI RF) and comes with primary verification.
- Warranty period for service — 48 months.

For detailed information about the Dissolved Oxygen Analyzer MARK-409T, please visit our website page dedicated to this product.