News Release

New Product
September 05, 2010

Announcing our New RTR-574
Illuminance UV Data Logger Wireless for US

The "RTR-574 wireless Illuminance UV Recorder" can simultaneously measure and record four items: Illuminance, Ultraviolet Light (UV), Temperature and Humidity. In addition to these, the RTR-574 is also capable of displaying Cumulative Illuminance and Cumulative UV Light in the LCD display.

Using with a Base Unit allows for the monitoring and managing of recorded data and current readings via your PC.
As recorded data and current readings can be sent to a specified address via e-mail or a specified folder via FTP it is possible to easily share data across a network.

As data can be easily downloaded via wireless communication with a compatible Base Unit there is no need to physically gather the data loggers.

Compatible Base Unit:
RTR-500 Wireless Base Station
RTR-500NW/RTR-500AW Network Base Station (Coming Soon)


  • With just one unit it is possible to measure and record Illuminance, Ultraviolet Light, Temperature and Humidity.
  • Possible to view Cumulative Illuminance and Cumulative Amount of Ultraviolet Light in the LCD display
  • Illuminance can be measured within a wide range (from dim moonlight to the summer sun)
  • View and record Illuminance in resolutions to 0.01 lx.
  • Possible to measure and record up to 8,000 readings per measurement item.
  • Simultaneously view all four measurement items in one easy-to -read Graph.
  • Download recorded data via wireless communication

Application Examples

  • In art museums and other exhibit forums to manage illuminosity and help prevent deterioration of exhibits
  • Management during all aspects of plant and food production
  • For use in the development, testing, manufacture and sales of products for cutting UV rays
  • UV reduction management in schools from kindergartens to universities
  • For home and office use in the management or illuminosity and UV rays
  • For managing the reduction of UV rays at swimming pools, the ocean, mountains and in parks.
  • For management and adjustment of illuminosity for photography and film
  • For management in the production, storage and sales of foodstuffs and beverages
  • For use at supermarkets, convenience stores and drugstores in UV product sales promotion materials


FCC model for US
Measurement Items Illuminance UV Intensity Temperature Humidity
Number of Channels 1 Ch 1 Ch 1 Ch 1Ch
Unit of Measurement lx, Klx mW/cm2 °C, °F %
Display Range of
Cumulative Measurement
0 to 90,000,000 lx.h 0 to 62W/cm2.h - -
Measuring Accuracy 10 to 100,000 lx: +/-5%
(At 25°C, 50%RH)
0.1 to 30mW/cm2: +/-5%
(At 25°C, 50%RH) (*1)
Avg. +/-0.3°C +/-5% (At 25°C, 50%RH)
LCD Refresh Interval 1 second (At a recording Interval of 1 second)
2 seconds (At a recording interval of 2 seconds or more)
Recording Intervals Select from 15 choices:
1, 2, 5, 10, 15, 20 and 30 seconds /1, 2, 5, 10, 15, 20, 30 and 60 minutes
Storage Capacity Up to 8,000 readings (One reading is a set of data which includes Illuminance, UV Intensity, Temperature, and Humidity measurements.)
Recording Mode Endless : Upon reaching storage capacity, the oldest data is overwritten and recording continues.
One-time: Upon reaching storage capacity, recording will automatically stop.
* When using RTR-500NW or RTR-500AW as a Base Unit, only “Endless” can be selected.
* When using an RTR-500 as a Base Unit, possible to select from either “Endless” or “One-time".
LCD Displayed Items (*2) Recording Status, Amount of Recorded Data, Communication Status, Recording Mode, Battery Life Warning,
Current Readings (Illuminance / UV Intensity / Temperature / Humidity), Cumulative Measurements (Cumulative Illuminance and Cumulative Amount of Ultraviolet Light), Unit of Measurement
Communication Interface Short Range Wireless Communication,
USB / RS-232C(Serial) Communication
Communication Time When downloading one Remote Unit at full storage capacity:
Wireless Communication = about 4 minutes (*3)
USB Communication = about 45 seconds
Wireless Specifications FCC Part15 Section247 / IC RSS-210 (Frequency Range: 902 to 928MHz)
Wireless Transmission Range About 150m(500ft) if direct and unobstructed.
Power AA Alkaline Battery (LR6) x 1
Battery Life About 4 months(*4)
Dimensions H55 x W78 x D18 mm (excluding protrusions) / Antenna Length: 60mm
Weight About 68g
(including AA Alkaline Battery / excluding sensors)
Operating Environment Temperature: -10 to 60°C
Humidity: 90%RH or less (no condensation)
Others Not waterproof, moistureproof, or dustproof.
In order to download data via wireless communication, it is necessary to purchase a Base Unit:RTR-500, RTR-500AW, RTR-500NW
(*1) Compared to the value measured by the T&D standard sensor for calibration under our calibration light source.
(*2) Up to four digits are valid for the Current Readings and Cumulative Measurements.
(*3) The same amount of time will be necessary for each added Repeater.
(*4)Battery life varies depending upon the measuring environment, the communication frequency, and the quality of the battery being used.

Release Date

Sep. 2010

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