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TR-74Ui USB Connected Illuminance & UV Recorder - Tech Instrumentation

TR-74Ui USB Connected Illuminance & UV Recorder

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  • $299.00

Illuminance UV Recorders

is a data logger designed to simultaneously measure and record four items: Luminescence, Ultraviolet Light (UV), Temperature and Humidity. In addition to these, the TR-74Ui is also capable of displaying Cumulative Luminescence and Cumulative Amount of Ultraviolet Light in the LCD display. From dim moonlight to the summer sun, Luminescence can be measured within a wide range.

The product is an all-in-one package that includes the data logger unit, sensors and software. We offer two types of packages with different temperature/humidity sensors depending on your required measurement range and accuracy needs.
Simply by connecting to a PC via a USB connection and carrying out a few easy steps, the measurement and recording of data can be started.

Not only can recorded data be easily downloaded to a PC via USB communication, but it can also be collected from data loggers via infrared communication to our T&D Data Collector TR-57DCi (optional, sold separately). The TR-57DCi enables the user to gather and check recorded data on the spot without having to manually gather the data loggers and connect to your PC via USB.


  • In art museums and other exhibit forums to manage luminosity 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 luminosity and UV rays
  • Design and management of homes and architectural buildings
  • For managing the reduction of UV rays at swimming pools, the ocean, mountains and in parks
  • For management and adjustment of luminosity 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


Product TR-74Ui TR-74Ui-H
Temperature/Humidity Sensor (External) THA-3151 HHA-3151(High-Precision Type)
Thermistor Polymer Resistance Platinum Resistance Electrostatic Capacitance
Measurement Channels Temperature Humidity 1ch Temperature Humidity 1ch
Units of Measurement °C, °F %RH °C, °F %RH
Measurement Range 0 to 55 °C 10 to 95 %RH -30 to 80 °C 0 to 99 %RH
Accuracy ±0.5 °C ±5 %RH (at 25 °C, 50 %RH) ±0.3 °C (at 10 to 40 °C) ±0.5 °C (at all other temperatures) ±2.5 %RH(at 25 °C, 10 to 85 %RH) ±4.0 %RH(at 25 °C, 0 to 10 % or 85 to 99 %RH) At temperatures other than 25 °C and "¡Ì_« 0 °C, add ±0.1 %RH per degree of difference from 25. Humidity Hysteresis: ±1.5 %RH or lower(*1)
Measurement Resolution 0.1 °C 1 %RH 0.1 °C 0.1 %RH
Response Time (90%) Approx. 7 min. Approx. 7 min. Approx. 20 sec.
Illuminance/UV Sensor (External) ISA-3151
Measurement Channels Illuminance: 1ch
UV intensity: 1ch
Units of Measurement Illuminance: lx, Klx
UV intensity: mW/cm2
Measurement Range Illuminance: 0 lx to 130 Klx
UV Intensity: 0 to 30 mW/cm2
Units of Cumulative Measurement Cumulative Illuminance: lxh, Klxh, Mlxh
Cumulative amount of UV Light: mW/cm2, W/cm2
Display Range of Cumulative
Illuminance: 0 lxh to 90 Mlxh
UV Intensity: 0 mW to 62 W/cm2h
Accuracy Illuminance: 10 lx to 100 Klx"¢__ ±5 % (at 25 °C, 50 %RH) UV Intensity: 0.1 to 30 mW/cm2"¢__ ±5 % (at 25 °C, 50 %RH) (*2)
Relative Spectral Response Illuminance: Approximated to the CIE standard response function V (ÌÇÌö )
UV Intensity: 260 to 400 nm
Measurement Resolution Illuminance: Minimum of 0.01 lx
UV Intensity: Minimum of 0.001 mW/cm2
Response Time (90%) 3 sec. (at recording interval of 1 sec.)
6 sec. (at other intervals)
Logging Capacity 8,000 data sets (One data set consists of readings for all channels in that type of unit.)
Recording Interval Select from 15 choices: 1, 2, 5, 10, 15, 20, 30 sec. or 1, 2, 5, 10, 15, 20, 30, 60 min.
Recording Mode (*3) Endless (Overwrite oldest data when capacity is full) or One Time (Stop recording when capacity is full)
LCD Display Items Measurements, Battery Life Warning, etc.
- Measurements: Illuminance / UV Intensity / Temperature / Humidity / Cumulative Illuminance / Cumulative amount of UV Light
- Display Pattern: Alternating or Fixed display
- Display Digits: Up to 4 digits
Communication Interfaces USB Communication, Serial Communication (RS-232C) (*4), Infrared Communication (IrPHY 1.2 low power)
Communication Time Downloading time for one unit at full capacity
- Via USB communication: approx. 45 sec.
- Via infrared communication: approx. 60 to 80 sec.
Power AA Alkaline Battery (LR6) x 1
Battery Life (*5) Approx. 6 months
Dimensions H 55 mm x W 78 mm x D 18 mm
Weight About 62 g (including battery, excluding sensor)
Operating Environment Temperature: -10 to 60 °C Humidity: 90 %RH or less (no condensation)
Accessories AA alkaline battery (LR6), USB Communication Cable (US-15C), Illuminance/UV Sensor (ISA-3151), Temperature/Humidity Sensor (THA-3151 or HHA-3151), Software (CD-ROM), User's Manual Set (Warranty Included)
  • *1) When used in environments where temperature and humidity are over the values of 50 °C 75%, 60 °C 50%, 70 °C 35%, and 80 °C 25%, sensor hysteresis may fluctuate by values greater than ±1.5%RH. Under certain circumstances, it may take some time to return to normal measurement capability.
  • *2) Compared to the value measured by the T&D standard sensor for calibration under our calibration light source.
  • *3) Only "Endless" is available when using RTR-500W for Windows.
  • *4) If necessary, serial communication can be established by using our communication protocol (contact your local distributor) to write a software program. In such a case, an optional serial communication cable (TR-07C) is needed.
  • *5) Battery life varies depending upon the ambient temperature in which it is used, the recording interval, the frequency of communication, and the battery performance. All estimates are based on operations carried out with a new battery and are in no way a guarantee of actual battery life. When infrared communication function is enabled, battery life may be shortened if the unit is used under the inverter type fluorescent lighting.
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