The VisiFerm DO ECS optical dissolved oxygen sensor offers a simple way to upgrade from traditional polarographic sensors. The sensor measurement principle offers increased accuracy and reduced maintenance while the ECS (Electrochemical Signal) output can be directly input into controllers and transmitters that accept the traditional nano-amp signal of a polarographic oxygen sensor.
Introducing VisiFerm RS485
The next generation VisiFerm drastically reduces calibration frequency and has a higher robustness. Learn more about the new sensors:
Compatible with existing bioreactors
Some new bioreactors are designed to directly receive the Arc 4-20 mA and Modbus signals. For older bioreactors that require a nanoAmp (nA) sensor output the VisiFerm ECS is capable of simulating this signal allowing for direct replacement of polarographic sensors with optical technology.
VisiFerm Sensor Caps
The standard H0 cap is the default option for most applications. The H2 cap has a convex design to minimize bubble accumulation and a PTFE membrane that increases the chemical resistance.
Connecting a VisiFerm
The VisiFerm requires more power than a traditional polarographic sensor. Some bioreactors provide this power and others require an external power source. Hamilton offers a variety of powered cables with various connectors to accommodate most installations. If your reactor uses a nonstandard connection contact Hamilton to find out about custom cabling options.
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Brochure - BioPharma
Catalog - Process AnalyticsDownload the Process Analytics sensor catalog to learn about the complete offering of Hamilton process sensors and accessories.
Brochure - Optical Dissolved OxygenDownload the dissolved oxygen brochure to explore the many benefits of making the switch to optical oxygen measurement.
Brochure - Optical Dissolved Oxygen Sensors for BiopharmaHamilton extensively investigated the effects of the bioprocess on measurement accuracy. Analysis of sensor aging, chemical attack, and physical damage yielded the necessary understanding for development of a next generation VisiFerm which reduces the need for frequent calibration.
Whats the difference between a VisiFerm sensor with ECS output and a sensor with Arc?
Which wireless adapter do I need for my sensor?Hamilton makes two Bluetooth wireless adapters - Wi 1G and Wi 2G. The Wi 1G is designed for VisiFerm sensors using the ECS (nA) signal. The Wi 2G is better choice with Arc sensors.
What is the expected lifetime and when should I replace my ODO cap?ODO cap health is process specific, with a cap quality indicator in ArcAir representing the general health of the ODO cap. ODO cap quality replacement is advised at 35%, however, some customers may replace ODO caps as part of a preventative maintenance program before reaching 35%. Click to learn more.
Can I use a VisiFerm, VisiPro, or VisiTrace for gas phase oxygen measurements?Yes. Optical DO sensors can be used for monitoring oxygen contents in air as well as dissolved oxygen.
Changing Caps on Optical Dissolved Oxygen Sensors
Arc Wi Wireless Bluetooth Adapters for probesThere are two versions of the Wi Wireless Bluetooth adapter. This article gets into the selection, wiring, and isolation of these products.
ArcAir Minimum Sensor Firmware RequirementsThis article lists the minimum firmware levels for all Arc sensors to properly work with ArcAir Software.
Modbus Communication Basics for Arc Intelligent SensorsThis simple primer article discusses the basic setup of Modbus for Arc intelligent sensors and VisiFerm ECS DO sensors.
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