PMS - Model Ultra DI - 20 Plus -20 nm Liquid Particle Counter

Counting and sizing contaminants as small as 20 nm in combination with real-time statistical analysis enables efficient characterization of filtration systems and optimum process control.  The thermal stabilization which is designed into the UDI 20 Plus eliminates measurement uncertainty based on changing environmental conditions and provides best in class matching between multiple instruments. This allows users to easily move the unit between different locations, while maintaining consistent data and even compare results across sites globally.

Modern UPW systems achieve particle cleanliness levels that can no longer be reliably measured with previous generations of particle counting instruments. With the combination of industry leading sensitivity, lowest zero count of <50 counts/liter, high counting efficiency, and thermal stability, the UDI 20 Plus sets the standard for UPW monitoring applications.

Particle Measuring Systems engineers, manufactures, installs, calibrates, repairs, and maintains the Ultra DI® 20 Plus liquid particle counter.

In this interview, Dwight Beal, Product Line Manager at PMS and industry expert on liquids contamination monitoring, talks about the newly released Ultra DI 20 Plus UPW particle counter. The new Ultra DI 20 Plus delivers the industry-leading 20 nm sensitivity and features of its predecessor, plus unrivaled particle matching, portability, and new applications.

• Advanced laser optics and sensors enable detection of particles down to 20 nm (9 nm Au)
• Quickly obtain meaningful statistical data to detect particle excursions and troubleshoot problems
• Fast sample cleanup shortens the time to move from one sample point to another
• Respond immediately to contamination with real-time particle measurement
• Eliminates the additional purchase price and maintenance cost for an environmental enclosure

• Unmatched instrument to instrument data stability and matching with thermally stabilized measurements of particles across a 18 to 29°C operating environment
• Instrument to instrument matching within 20% at concentrations of >2 particles per ml
• Compare UPW system performance across multiple fabs in any environmental conditions anywhere in the world
• Fleet can be swapped without disruptions or questions about the data
• Two counting modes
• High resolution – for pure environments
• High concentration – for filter challenge tests and lower purity environments
• Connect directly to PLC and SCADA systems with 4-20 mA and utilize existing network with Ethernet communication

• Quantifying particle concentration in state-of-the-art ultrapure water (UPW) systems
• Filter efficiency measurements
• Trending analysis at lower particle concentrations
• Detecting bacterial growth in UPW systems
• Episodic event tracking and alarming
• Continuous system monitoring