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・For exposure machine! UV conveyor! A single unit can measure both illuminance and light intensity.
・This is a handy type UV light meter with a small, lightweight and thin body suitable for measurement.
・Ideal for exposure control (irradiation dose) management applications of exposure equipment for electronic circuit boards, UV conveyors, and various UV illumination devices.
・Measurement modes such as light intensity measurement, illuminance measurement, and peak illuminance measurement can be selected.
・Robust metal body structure that resists heat. (MAX60 ° C … with temperature monitor display)

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Measurement wavelength range320~390nm(UV-351)  240~270nm(UV-351-25)
Peak sensitivity wavelength360nm(UV-351)  254nm(UV-351-25)
Measurement light intensity range0.1~19999.0mJ/c㎡
Light intensity display range0.1~19999.0mJ/c㎡
Measurement illuminance range0.1~100.0mJ/c㎡
Operating temperature limit0~60℃ However, no condensation
Power supplyCoin-type lithium (300 hours continuous use)
Alignment accuracyWithin ± 1.5% of our UV standard
Repeat accuracyWithin ± 1.0
accessoriesNeutral density filter 1/10
Option modelUV-351-25/UV-351-42

About SD type and SN type

The SD type has been widely used by customers who have been using exposure equipment and irradiation equipment for a long time, ensuring continuity of process management.
SD type is used in the manufacturing process of semiconductor and liquid crystal substrates, and customers who already use illuminance meters made by other companies place importance on ensuring data compatibility with those measuring instruments (projection type even in exposure equipment). SD type is used for exposure equipment and peripheral exposure equipment for liquid crystal substrates), and is recommended for customers who use illuminometers completely newly.

Indication value of SD type and SN type

In order to ensure the compatibility of process data from the past with the SN type, the indication value of the SD type (the 365 nm emission line of the high-pressure mercury lamp used as the calibration radiation source in the measurement group was measured under the same measurement conditions. It is adjusted to display 39% higher than the illuminance value shown at the time: mW / cm2 display.