Lutron YK-35UV Ultraviolet Light Meter, UVA and UVB, 260 to 390 nm, with Remote Probe
The Lutron YK-35UV measures ultraviolet irradiance across a 260 to 390 nm band, covering UVA and the upper part of UVB, in milliwatts per square centimeter. Two ranges cover up to 1.999 mW/cm² at 0.001 resolution and up to 19.99 mW/cm² at 0.01 resolution, which spans everything from a modest inspection lamp to a production curing head.
The sensor is on a separate corded probe with a cosine correction filter, so it can be laid on a cure bed, clamped at a work plane or reached into an exposure unit while the display is read from where it is safe and convenient to stand. A threaded tripod mount and fold-out easel stand on the meter body let it be set up for an unattended measurement rather than held.
Maximum and minimum readings are recorded with recall, a single button freezes the display, and an RS-232/USB port allows output to a computer. A DC 9V adapter socket means it can run continuously without eating batteries.
Ultraviolet light injures eyes and skin, and the damage gives no warning while it is happening. Never look at an energized UV lamp. Wear UV rated eye protection, cover exposed skin, and use the separate probe so the sensor is in the beam and you are not.
NOTE: This meter's band begins at 260 nm. Germicidal lamps used for disinfection emit at 254 nm, below this range, so the YK-35UV is not suitable for verifying germicidal UVC output. For 254 nm work use a UVC meter, or the YK-37UVSD, which covers both bands.
Typical Applications
Industrial:
- Curing of inks, adhesives and coatings — verifying lamp output before a run and tracking it as lamps age.
- Photoresist exposure and graphic arts platemaking.
- Photochemical matching.
- EPROM erasure equipment.
- Monitoring ultraviolet radiation hazards around welding operations.
- Blacklight and inspection lamp output checks, including magnetic particle and dye penetrant inspection.
- Tanning equipment output verification.
Laboratory:
- Weathering and degradation studies.
- Virology and microbial genetics.
- DNA research and transilluminator output checks.
- Biological safety hoods fitted with UVA or UVB sources.
- General laboratory use.
Features
- Professional, high quality ultraviolet meter.
- Ultraviolet irradiance measurement for UVA and UVB.
- Detector spectrum from 260 nm to 390 nm.
- Two ranges: 2 mW/cm² and 20 mW/cm², each selected by its own button.
- Exclusive ultraviolet sensor structure.
- Sensor with cosine correction filter, so light arriving at an angle is weighted correctly.
- Built-in zero button.
- Separate ultraviolet probe on a cable, so the sensor can be placed at the optimum position while the meter is read from a safe distance.
- Data hold freezes the displayed value.
- Records maximum and minimum readings with recall.
- Threaded tripod mount and fold-out easel stand for unattended measurement.
- Microprocessor circuit provides high reliability and durability.
- Large LCD display for easy readout.
- Low battery indication.
- RS-232/USB computer interface.
- Built-in DC 9V power adapter input socket, for continuous operation without batteries.
- Heavy duty, compact housing.
Specifications
- Sensor spectrum: band pass 260 nm to 390 nm.
- Sensor: exclusive ultraviolet photo sensor with cosine correction filter.
- Low range: 0.000 to 1.999 mW/cm², 0.001 mW/cm² resolution.
- High range: 0.00 to 19.99 mW/cm², 0.01 mW/cm² resolution.
- Accuracy: ± (4% F.S. + 2 digits). Calibration is performed under UVA light against a standard UVA meter.
- Zero adjustment: by push button, operable when the display reads 0.1 mW/cm² or less.
- Controls: power, hold, REC, range and zero buttons.
- Display: 51 x 37 mm LCD, maximum indication 1999 counts.
- Display sampling time: approximately 1 second.
- Over range indication: shown on the display when the reading exceeds the selected range.
- Circuit: microprocessor.
- Data output: RS-232/USB PC serial interface.
- Meter dimensions: 7.9 x 2.7 x 1.2" (200 x 68 x 30 mm).
- Sensor probe head: 1.8" diameter x 1.3" (45 mm diameter x 32 mm).
- Sensor probe handle: 4.9" x 0.9" diameter (125 x 24 mm diameter).
- Weight: 13.5 oz (383 g), battery included.
- Operating temperature: 32 to 122 °F (0 to 50 °C). NOTE most batteries are not rated for use below -4 °F or above 125 °F.
- Operating humidity: less than 85% RH, non-condensing.
- Storage condition: 14 to 140 °F (-10 to 60 °C).
- Power supply: one 9V (006P, MN1604, PP3) battery, or an optional AC to DC 9V adapter.
- Power consumption: approximately 6 mA DC.
Specifications are tested in an environment with RF field strength less than 3 V/m and frequency less than 30 MHz.
Sensor Storage
The ultraviolet sensor must be stored dry. Seal the probe in a plastic bag with a desiccant pack whenever the meter is not in use, and take it out only to measure. Moisture reduces the sensor's gain over time, which shortens the calibration interval and eventually costs accuracy. Replace the desiccant periodically.
Accessories Included
- Remote ultraviolet sensor probe.
- Sensor cover.
- Instruction manual.
- One year limited manufacturer's warranty.
Optional Components
- 110V AC to 9V DC adapter, AP-9V110.
- USB to 9V DC power cable, USBP-59.
- Lutron USB data acquisition cable with driver, USB-01.
- RS-232 cable, UPCB-02.
- Lutron data acquisition software for Windows, SW-U801-WIN.
- Soft carrying case, CA-05A.
- Hard carrying case, CA-06.
