UVC & UVA Ultra-Violet Light Meter (YK-37UVSD) DataLogging

Lutron YK-37UVSD UVA and UVC Light Meter with Temperature Port and SD Card Data Logging

The Lutron YK-37UVSD measures both bands of ultraviolet that matter in practice, using two supplied probes and one meter. The UVA probe covers 250 to 390 nm with peak response at 365 nm — blacklights, curing lamps, inspection lamps. The UVC probe covers 200 to 290 nm with peak response at 254 nm — germicidal lamps and disinfection equipment.

That combination is unusual and it is the reason to buy this meter rather than two. A single band instrument covers half the work: a UVA meter cannot read a germicidal lamp, and a UVC meter cannot read a curing lamp or a blacklight. Anyone whose work spans both — a facility with UV disinfection and UV curing, a laboratory with transilluminators and biosafety cabinets, a service company covering several customers — otherwise carries two instruments and two calibration schedules.

Readings log to an SD card with a date and time stamp at intervals from 1 second to 1 hour, and open directly in Excel with no software to install. The meter also accepts a Type K or Type J thermocouple for a separate temperature channel, which is useful because lamp output and lamp temperature are related.

Ultraviolet light injures eyes and skin, and UVC at 254 nm does so quickly and without sensation — pain and redness appear hours after the exposure. Never look at an energized UV lamp. Wear UV rated eye protection, cover exposed skin, and use the separate probes so the sensor is in the beam and you are not. Some germicidal lamps also generate ozone; ventilate accordingly.

Typical Applications

With the UVC probe, at 254 nm:

• Verifying germicidal lamp output in hospitals, clinics and medical facilities.
• Biological safety cabinets and laminar flow hoods.
• Upper room and in-duct UVGI air disinfection.
• UVC water treatment and wastewater disinfection.
• Surface disinfection equipment and mobile room sanitizing units.
• Food processing and packaging line sterilization.
• EPROM erasure equipment.

With the UVA probe, at 365 nm:

• Curing of inks, adhesives and coatings — checking lamp output before a production run.
• Photoresist exposure and graphic arts platemaking.
• Blacklight and inspection lamp output checks, including magnetic particle and dye penetrant inspection.
• Photochemical matching.
• Weathering and degradation test chambers.
• Monitoring ultraviolet radiation hazards around welding operations.
• Tanning equipment output verification.
• Forensic and document examination lamps.

Features

• UVA and UVC light measurement in one meter, with both probes supplied.
• Long wave 365 nm irradiance measurement, for reading the output of a UVA or blacklight source.
• Short wave 254 nm irradiance measurement, for reading the output of a germicidal UVC source.
• Two ranges: 2 mW/cm² and 20 mW/cm².
• Exclusive ultraviolet sensor structure with metallic housing.
• Sensors with cosine correction filter, so light arriving at an angle is weighted correctly.
• One touch zero button for the ultraviolet function.
• Separate probes on cables, so a sensor can be placed at the optimum position and angle while you stay clear of the beam.
• Real time SD memory card data logger with built-in clock and calendar. Sampling time settable from 1 to 3,600 seconds.
• Manual data logging by setting the sampling time to 0 seconds, with a selectable location number from 1 to 99.
• No software to install. Remove the SD card, plug it into a computer, and the readings open directly in Excel with year, month, date, hour, minute and second.
• Type K and Type J thermocouple port with automatic temperature compensation.
• Beeper, which can be switched off.
• Data hold, plus maximum and minimum recording with recall.
• Auto power off, which can be disabled.
• Large LCD with green back light for reading in dim areas.
• Tripod mount and self-storing easel stand built into the case.
• RS-232/USB computer interface.
• Powered by six AA batteries or an optional 9V DC adapter.
• Same instrument as the Omega HHUV254SD and General Tools UV254SD, in a different color.

Specifications

• UVA sensor spectrum: 250 nm to 390 nm, with optimum response at 365 nm.
• UVC sensor spectrum: 200 nm to 290 nm, with optimum response at 254 nm.
• Sensors: exclusive ultraviolet photo sensor with cosine correction filter and metallic housing.
• UVA / UVC selection: by front panel button.
• Zero adjustment: by push button.
• Circuit: custom one-chip microprocessor LSI.
• Display: 52 x 38 mm LCD with green back light, switchable on and off.
• Display sampling time: approximately 1 second.
• Data logger sampling time: 1 to 3,600 seconds in automatic mode; manual mode saves one reading per button press, with a selectable location number from 1 to 99.
• SD card capacity: 1 GB to 16 GB.
• Advanced settings: clock, decimal character for the SD card, auto power off, beeper on/off, thermometer type (K or J), temperature unit, sampling time, and card format.
• Temperature compensation: automatic, for the Type K/J thermometer.
• Data hold: freezes the displayed reading.
• Memory recall: maximum and minimum values.
• Data output: RS-232/USB PC interface. The optional UPCB-02 cable provides an RS-232 plug; the optional USB-01 cable provides a USB plug.
• Meter dimensions: 7.0 x 2.7 x 1.8" (177 x 68 x 45 mm).
• UVA probe dimensions: head 1.8" diameter x 1.3" (45 mm diameter x 32 mm); handle 4.9" x 0.9" diameter (125 x 24 mm diameter).
• UVC probe dimensions: 1.5" diameter x 1.0" (38 mm diameter x 25 mm).
• Meter weight: 12.4 oz (351 g).
• UVA probe weight: 3.5 oz (100 g).
• UVC probe weight: 3.6 oz (103 g).
• 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.
• Power supply: six 1.5V AA (UM3) alkaline or heavy duty batteries, or an optional AC to DC 9V adapter.
• Power consumption: approximately 6.5 mA with no SD card saving and the back light off; approximately 30 mA while saving to the card; add approximately 16 mA with the back light on.

Ultraviolet Measurement

Specifications apply at 23 ± 5 °C, and are the same on both the UVA and UVC functions. UVA calibration is performed under UVA light against a standard UVA meter, and UVC calibration under UVC light against a standard UVC meter. Note that 1 mW equals 1 mJ per second.

Type K and Type J Thermometer

The temperature channel is a separate function, used when both light probes are disconnected.

Specifications are tested in an environment with RF field strength less than 3 V/m and frequency less than 30 MHz.

Accessories Included

• UVA light sensor probe with sensor cover.
• UVC light sensor probe.
• Hard shell padded carrying case, CA-06.
• Instruction manual.
• Lutron factory calibration certificate.

Optional Components

• Light probe extension cable, EXCB-05.
• 16 GB SD memory card, SD-16GB.
• Type K thermocouple probes: TP-01, TP-02A, TP-03, TP-04, TP-05.
• Lutron data acquisition software for Windows, SW-U801-WIN.
• Lutron Excel data acquisition software, SW-E802.
• Lutron USB data acquisition cable with driver, USB-01.
• RS-232 cable, UPCB-02.
• USB to 9V DC power cable, USBP-59.
• 110V AC to 9V DC adapter, AP-9V110.