Forbes Marshall - Trusted Partners in Steam Engineering & Control Instrumentation
Forbes Marshall - Trusted Partners in Steam Engineering & Control Instrumentation

VisiPro DO

Monitoring dissolved oxygen levels in volatile chemical and pharmaceutical environments requires absolute safety without compromising precision. The VisiPro DO transforms your hazardous area monitoring by securing both ATEX and IECEx certifications, ensuring total compliance and safety in explosive zones.

By eliminating the need for conventional amperometric measurement and replacing it with optical technology, the VisiPro DO does not consume oxygen during measurement, meaning it requires absolutely zero minimum flow or stirring. This stainless-steel probe is robust and easy to install,  with a simple 2-wire connection and instantly track measurements ranging from 4 ppb up to 25 ppm. Whether you are blanketing tanks with nitrogen, purging lines, or inerting reactors, the VisiPro DO drastically simplifies your maintenance schedule while keeping your process control system seamlessly connected.

Applications of VisiPro DO include:

  • Chemical Manufacturing: Ideal for hazardous area blanketing (Nitrogen) and inerting to prevent combustion
  • Pharmaceutical Processing: Safe deployment during critical sparging and purging applications
  • ATEX and IECEx Certification : Guarantees protection and compliance when deployed in explosive chemical and pharmaceutical environments
  • Oxygen Luminescence Quenching: Zero polarization time required, thus allowing for rapid start-up and highly reliable readings
  • Integrated Digital Transmitter: Direct 4-20 mA or digital HART 7.0 communication to your process control system with no extra hardware
  • No Oxygen Consumption: Highly accurate even in stagnant fluids, entirely eliminating the need for process flow or stirring

Variants

Shaft Lengths Available

Available in 120 mm and 225 mm lengths

Cap Configurations

Available with the ODO cap H0 for hygienic pharmaceutical applications or the ODO cap H2 for harsh chemical applications

Frequently Asked Questions

Is the VisiPro DO safe for explosive chemical environments?

Yes. The VisiPro DO is the first optical dissolved oxygen sensor to carry both ATEX and IECEx certifications, making it completely safe for explosive environments like chemical and pharmaceutical plants.

How does the VisiPro connect to my control system?

The sensor features an integrated transmitter in its head, allowing for easy installation via a 2-wire connection that outputs a direct 4-20 mA standard signal or digital HART communication directly to your process control system.

Does the VisiPro DO require a minimum flow rate to work?

No. Because the sensor uses optical luminescence quenching, it does not consume any oxygen during measurement, making it completely flow-independent.

What temperature range can the VisiPro DO withstand?

The sensor is highly durable and can withstand process temperatures from -20 to 140°C, though it is designed to temporarily suspend DO readings when temperatures exceed 85°C to protect the optical elements.

Can I calibrate the sensor away from the process line?

Yes. Thanks to its smart integrated transmitter and wireless communication capabilities, relevant sensor data is stored in the head, allowing you to easily perform laboratory calibrations via a computer before field installation.

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