The majority of all biotechnological processes are of the aerobic kind.
A microorganism or cell responds to the liquid phase oxygen concentration
in regulating its overall metabolism. Therefore the knowledge of the DO
concentration and the proper control during the process are of great importance.

• The AppliSens Low Drift DO sensor offers a guaranteed low drift.
  Features:
• The sensor is constructed using FDA approved materials
• Cable connector, identical to the one as with the pH sensor
• 12mm diameter body
• PG13.5 connector, free spinning (easy mounting)
• a Long-Life code print (engraved serial number) on the sensor head
• Optimal cleanability (fully electropolished surface Ra <0.8*m)
• each sensor is accompanied by a certificate(good for validation; FDA / GLP).

The AppliSens DO sensors are specifically designed for fermentation and cell culture application and designed to withstand repeated sterilizations without failure.
The Low Drift DO sensor is based on the principle of the Clark cell and can be used in combination with any brand polarographic type of amplifier. 

The combination of a small cathode with a composite membrane along with
a highly permeable reinforced silicon membrane results in:

• low flow dependency
• good response time
• high mechanical strength
• maintenance free operation over several months
• simple maintenance

Ordering information:

Z010011020 DO LowDrift sensor, insertion length 110mm (Tracfix)
Z010015420 DO LowDrift sensor, insertion length 154mm
Z010023520 DO LowDrift sensor, insertion length 235mm (Bioreactor 1-5 Ltr.) 
Z010032520 DO LowDrift sensor, insertion length 325mm (Bioreactor 7 Ltr.)
Z010042520 DO LowDrift sensor, insertion length 425mm (Bioreactor 15 Ltr.)
Z010059020 DO LowDrift sensor, insertion length 590mm (Bioreactor 20 Ltr.)

Other insertion lengths upon request
Z010007025 DO LowDrift sensor for DN25 port (side entry SIP vessels)

Dissolved oxygen sensor, NTC, sterilizable.

A number of bioreactor systems still are equipped with DO-sensors with a 4-pin connector. In some of these systems an in the sensor integrated NTC is applied for automatic temperature compensation.
The dissolved oxygen electrode is based on the principle of the Clark cell. The combination of a small cathode with a composite membrane along witha highly permeable reinforced silicon membrane results in:

• low flow dependency
• good response time
• extremely high mechanical strength
• simple and low cost maintenance
• built-in NTC resistor (automatic temperature compensation, provided the amplifier is fitted for this).
• fully electropolished surface (Ra <0.8*m); optimal cleanability

The sensor diameter is 12 mm and fits into a standard sensor holder.