Extech SDL470 UVA/UVC Light Meter/Datalogger


Key Features

  • UVA probe captures long-wave 365nm UV irradiance measurements under a UVA (black light) source
  • UVC probe captures short-wave 254nm UV irradiance measurements under a UVC light source
  • Cosine correction filter and metal housing
  • Datalogging feature records readings with date and time stamp on an SD card (included) in Excel® format
  • Offset adjustment used for zero function or to make relative measurements


Display: Backlit LCD size: 52 mm x 38 mm (2.0 x 1.5”)

Measurements: UV light, UVA and UVC; Type K or J thermocouple temperature

UVA, UVC selection: Front push-button

UV Sensor spectrum: UVA (390 – 280nm), UVC (280 – 240nm)

UV sensor: Exclusive photo sensor with cosine correction filter

UV light zero adjust: Push-button

Data storage/recall: Records Max and Min readings with recall

Datalogger: Auto: 1 second to 3600 second sample rate. Manual: Button press (sample rate set to ‘0’)

Memory SD card: 1G to 16GB SD Card (for best results use a 4GB or smaller card)

Temperature compensation: Auto compensation for the Type K/J thermocouple thermometer

Display sampling rate: 1 second approx.

Data output Extech SDL470: RS-232/USB PC interface

Operating Temperature: 0oC to 50oC (32oF to 122oF)

Operating Humidity: Less than 85% RH

Power Supply: Alkaline 1.5V AA batteries x 6; or 9V AC adaptor (UA100-240)

Power Consumption: Normal operation (without SD storing and with display backlight OFF): 6.5mA DC approx. With SD card storing but display backlight OFF: 30mA DC approx. With the LCD backlight ON the power consumption increases by 16mA DC approx.

Weight: Meter: 351g (11.3 oz.); UVA Probe: 100g (3.2 oz.); UVC Probe: 103g (3.3 oz.)

Dimensions: Meter: 177 x 68 x 45mm (7.0 x 2.7 x 1.8”); UVA Probe head: 45 mm diameter x 32 mm (1.8 dia. x 1.3”); UVA Probe handle: 125 x 24 mm diameter (5.0 x 0.9” dia.); UVC probe: 38mm diameter x 25 mm (1.5 dia. x 1.0”)

Accessories included: Instruction manual, UVA light sensor, UVC light sensor, hard-shell carrying case, batteries, 9V AC adapter, and user guide

Optional Accessories: Type K thermocouple probe, USB cable (407001-USB) and data acquisition software (407001)

Introduction Extech SDL470

Short-/Long-wave UV Irradiance Light Meter with Datalogging

The SDL470 is a UVA/UVC Light Meter and Data logger. The SDL470 can measure both long wave and short wave UV irradiance under UVA and UVC light sources respectively. This meter features a cosine correction filter, data logging to Excel format, offset adjustment for relative measurements, type K/J thermocouple input for temperature measurements (probe sold separately), record/recall modes, min and max readings, data hold plus auto power off with disable function. This product comes with a built-in tilt stand, SD memory card, UVA light sensor with protective cover, UVC light sensor, hard case, universal AC adaptor, and 6 x AA batteries.


– UVA and UVC light measurement in one meter
– Long wave 365 nm ultra-violet irradiance measurements (UVA)
– Professional UVA meter, used to measure the UVA Radiation from UVA light (black light)
– Short wave 254 nm ultra-violet irradiance measurements (UVC)
– Professional UVC light meter, measures UVC irradiation from UVC light source
– Two ranges: 2000 μW/cm2 and 20 mW/cm2
– Meter includes two probes: UVA probe and UVC probe
– UV Sensor with cosine correction filter
– UV Zero feature (Extech SDL470)
-Applications include: Monitoring blue light radiation from welding equipment, UV sterilization, graphic arts, photochemical matching, UV EPROM erasure, Photo-resist exposure, ink curing, adhesives and coatings
– Microprocessor circuit provides high reliability and durability
– Separate UV light probe allows the user to measure UV light with optimum positioning
– Type K and Type J thermocouple thermometer (probe not included)
– Real time SD memory card Datalogger, built-in calendar clock, real-time data recording, with selectable sampling time (rate) from 1 second to 3600 seconds
– Manual Datalogging (set the sampling rate to 0)
– Simple, innovative operation, PC not required to setup. Simply use the SD card to transfer data from meter to PC
– SD card capacity: 1 GB to 16 GB.
– LCD with green backlight is easy to read
– Meter can be set to default on auto power off or manual power off
– Includes Data hold, Record MA and MIN readings
– Powered by Alkaline 1.5V AA x 6 batteries or 9V AC adaptor
– RS232/USB PC computer interface

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