OAI 306 UV Power Meter 0306-001-04 Handheld UV Intensity Meter 365nm Probe

OAI 306 UV Power Meter 0306-001-04 Handheld UV Intensity Meter 365nm Probe

The OAI Model 306 is a handheld UV power meter (radiometer) made by Optical Associates Inc. of Milpitas, California. It measures ultraviolet light intensity in real time, displaying readings in mW/cm² on a large LCD. The meter operates with a tethered UV probe — this unit includes the 0306-001-04 365nm probe — and offers three measurement modes: NORM for continuous real-time intensity, HOLD to freeze the current reading, and PEAK HOLD to capture the maximum intensity recorded during a measurement session.

Specifications & What's Included

• Manufacturer: OAI (Optical Associates Inc.), Milpitas, California, U.S.A.
• Meter Model: OAI 306 UV Powermeter
• Probe Model / MPN: 0306-001-04
• Probe Wavelength: 365 nm
• Display: LCD, reads in mW/cm²
• Measurement Modes: NORM (real-time intensity), HOLD (freeze reading), PEAK HOLD (maximum intensity captured)
• Power: 9V Alkaline battery
• Form Factor: Handheld
• Includes: OAI 306 meter body and 0306-001-04 365nm probe with cable
• Note: A National Cal & Stds Lab calibration sticker is affixed (cal date January 2003 — calibration is expired; recalibration is recommended for precision-critical applications)

Applications

The OAI 306 UV power meter is a standard instrument in photolithography and semiconductor fabrication, used to measure the UV exposure intensity of mask aligners, contact aligners, and UV lamp systems operating at 365 nm (i-line). It is commonly found in university cleanrooms, research fabs, MEMS labs, and printed circuit board shops where accurate UV dose control directly affects photoresist exposure quality and process repeatability. The 365 nm wavelength is the i-line of mercury arc lamps — the workhorse wavelength for contact and proximity photolithography — making this probe the most widely used configuration for aligner qualification, lamp monitoring, and process setup. Beyond semiconductor work, the OAI 306 is also used in UV curing, UV sterilization system verification, and general UV lamp intensity measurement in industrial and scientific settings.