D540 (12mm) OxyProbe II Dissolved Oxygen Sensor

The D540 (12mm) Oxyprobe II dissolved oxygen sensor uses our standard D9 connector which has hermetically sealed gold-plated contacts in a glass insulator, offering the ultimate in signal isolation and transmission. For customers with installed VarioPin cable systems we also offer the D540 VP with VarioPin options available for all of our designs.

Hygienic Sensor Design

• Microrganisms cannot adhere to the sensor surface due to the enhanced finish (N5/Ra15µ in Quality).
• The sensor is fully sterilizable and autoclavable.

Time-Saving Maintenance

• Membrane body and sensor inner body can be changed out very quickly. A simple membrane body replacement takes just two minutes and can be made on site by the user.
• Due to the modular design, the different sensors have basically the same spare parts. This minimizes inventory stocking requirements.

D540 (12mm) OxyProbe II Dissolved Oxygen Sensor Features Overview

• Autoclavable and steam sterilizable.
• Accurate measurement and quick response.
• Long lasting and easy to maintain membranes.
• FDA positive listed materials of construction.
• Hygienically polished N5 surface finish (Max. Ra15µ in).
• Wetted O-rings comply with FDA and USP Class VI standards.

Other Highlights

• Comes with either waterproof VarioPin or D9 connector.
• T-Pull connector versions allow for easy removal from fermenter and reduces strain on cable.
• Variety of sensor lengths available.

Replaceable Anode/Cathode Assembly

A concept pioneered by Broadley-James, this unique assembly permits the sensor to be repaired quickly and reliably. Send your sensors to us for rebuild and save about half the price of purchasing a complete new sensor assembly!

How to choose a sensor

• Determine how far the sensor should project into the vessel.
• Decide whether a right angle connector is preferred over a straight connector.
• Choose the correct cable length and connector. All DO sensors require cable and connector assemblies.

It is important to regularly maintain the sensors by inspecting and calibrating them. The membrane cartridge (see Accessories tab for relevant membrane cartridge kits) should be checked and refilled prior to every use.

12 mm OxyProbe Sensors Straight

Membrane Kits

Broadley-James offer a range of membrane kits to suit all our dissolved oxygen sensors. These include everything required to replace the membrane cartridge and internal o-rings. All kits include:

• QC Certificate
• Material Cert

Use our Membrane Replacement instructions for detailed information about replacing the membrane in the D540 (12mm) OxyProbe II Dissolved Oxygen Sensor.

The following membrane kits are suitable for use with the D540 (12mm) OxyProbe II DO Sensor:

Membrane Kit	Example Image	Kit Contents
Single Cartridge Kit for OxyProbe II Part No. MK29-01		One 25 ml bottle of electrolyte One membrane cartridge One set of internal o-rings
Four Cartridge Kit for OxyProbe II Part No. MK29-04		One 25 ml bottle of electrolyte Four membrane cartridges Four sets of internal o-rings
16 Piece Cartridge Kit for OxyProbe II Part No. MS29-16		16 membrane cartridges in one easy-to-store box. Internal o-rings and electrolyte must be ordered separately.

OxyProbe II Replacement Cap sleeve

Replacement cap sleeves are available for OxyProbe II Sensors in both standard (Part No. AM-9657-S) and guarded (Part No. AM-9657-G) formats.

Compatible Cables

The D540 Autoclavable DO Sensor uses a D4 connector. This industry standard connector was the first, and is still, the best choice for DO sensors. We recommend the following cables for use with the D540 Autoclavable Dissolved Oxygen sensor:

Cable Type	Sensor connector & Device Connector	Device Terminal
D4 plug to Lemo 6
DO Cable D4 to Crimped Ferrules

Additional information

The internal seals of an Oxyprobe are all mechanical seals using o-rings. There are no adhesives to leak or fail in process, making this a more rugged and reliable sensor. Replacing the cathode is also much easier and faster since there is no sealant to clean from the threads. No sealant also makes the job of replacing the cathode much faster and cleaner.