EIT® ON-LINE PRODUCT OVERVIEW
4Pages

EIT® ON-LINE PRODUCT OVERVIEW ON-LINE MONITORING SYSTEMS EIT’s On-Line Systems measure UV intensity to provide continuous, real-time, feedback on a system. The solution is electro-optic based and can be used to monitor the UV from LED or Broadband (mercury) sources in situations where: • • • • • • • • • Space is limited and a radiometer will not fit Arms, rollers and/or blades are present Sources are enclosed, not easily accessed or high off the ground Multiple sources are used to increase production line width Fast production speeds make it hard to use a radiometer UV conditions change rapidly due to off-gassing and/or contamination High value products are manufactured and undetected changes in the UV can lead to high scrap levels Continuous validation of the UV conditions is required The process window is tight Top: EIT Compact Sensor Above: EIT DIN Rail Applications include web presses, fiber optic draw towers, hard drive manufacturing, print and medical applications. The intensity measured by the On-Line Monitoring System is a relative intensity versus an absolute (W/cm2) value. The user is able to track both gradual (e.g. source aging) or sudden (equipment malfunction) changes to the UV intensity to take action before the changes impact product quality and bottom line profitability. The On-Line System consists of two components: Compact Sensor and DIN Rail Signal-Conditioning Unit. The system can be used as the sole means of UV process control or in conjunction with an EIT NIST-traceable UV radiometer. EIT Compact Sensor: An extremely durable sensor with sealed optics designed to withstand harsh UV environments. Sensors are available for LED or Broadband based sources. EIT and our representative/ distributor network will assist in selecting the optic response, housing shape, aperture size and mounting location based on the UV source type and application. EIT DIN Rail: The Compact Sensor works with the EIT DIN Rail to provide a signal (0-10 volt or 4-20 milliAmp) proportional to the real time UV intensity. The signal from the DIN Rail allows the user to track the relative real-time intensity on a PLC or display. The DIN Rail also allows the user to set low limit alarms and/or close a relay if the pre-programmed limits are exceeded. An EIT Compact Sensor mounted behind a UV reflector can provide continuous information on the lamp condition. EIT DIN Rail units installed in cabinet to support multiple Compact Sensors used in production.

EIT Compact Sensor Durability The Compact Sensor uses an innovative optics design to increase durability and reduce solarization (degradation of optical components) caused by intense UV energy. An EIT UVA Compact Sensor was tested for over 6,700 hours in an intense high power microwave UV system. The optics were characterized before and after the test. Results showed a very small decrease (4%) in the optical transmission characteristics. The EIT Compact Sensor also has over twenty years of real world monitoring experience, making it the choice to monitor even the most intense Uv sources...

Electro Magnetic Interference (EMI) UV equipment (e.g., high-frequency power supply, power supply mounted in with the UV source, microwave source) has the potential to generate Electro Magnetic Interference (EMI) or electrical noise. A Compact Sensor cable, even with its shield, can also pick up electrical noise if it is run alongside a high voltage line. This electrical noise can make it appear that either the sensor and/or the source is unstable. The EMI Compact Sensor and EMI DIN Rail have been ‘hardened' with additional circuitry to make them less susceptible to electrical noise or...

EIT QUARTZ ROD Some UV applications/sources have limited physical space and/or high temperatures which make it difficult to find a suitable location to install the Compact Sensor. The EIT Quartz Rod solves this challenge and allows the user to track the UV conditions while keeping the Compact Sensor cool. The EIT Quartz Rod is made of high quality quartz and is four inches (10 cm) long with a diffuse outer surface. The 0.2” (0.5 cm) diameter of the Quartz Rod allows it to fit into CS-1 housing with a set screw. Top Left: Compact Sensor with Quartz Rod installed Bottom Left: Quartz Rod...