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

TR-74Ui USB Connected Illuminance & UV Recorder

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Illuminance UV Recorders

The TR-74Ui and TR-74Ui-H are data loggers which simultaneously measure and record four items: Luminescence, Ultraviolet Light (UV), Temperature and Humidity plus Cumulative Luminescence and Cumulative Ultraviolet Light in the LCD display.

The product is an all-in-one package that includes the data logger unit, sensors and software. Choose from packages with different temperature/humidity sensors depending on your required measurement range and accuracy needs.

Data can also be collected from data loggers via infrared communication to our TR-57DCi (optional, sold separately). 

Application Examples

  • Art museums to help prevent deterioration of exhibits
  • Plant and food production
  • Development, testing, manufacture and sales of products for cutting UV rays
  • UV reduction management in schools from kindergartens to universities
  • Management and adjustment of luminosity for photography and film
  • Management in the production, storage and sales of foodstuffs and beverages
  • 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  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 x 1
    Battery Life (*5) Approx. 6 months
    Weight About 62 g (including battery, excluding sensor)
    Environment Temperature: -10 to 60 °C Humidity: 90 %RH or less (no condensation)
    Accessories AA alkaline battery, USB Cable, 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.

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    210 reviews

    Shipment arrived on time and as ordered.

    La Crosse Technologies V10-TH

    The La Crosse V10-TH Wireless Weather Station (Model No. C84343) is absolutely wonderful. The setup was easy with the Quick Setup Guide provided with the unit. The packaging contains additional support information with the website and phone number if there are questions. I especially liked the daily high low readings and the color on the unit! Tech Instrumentation provided great communication as to the availability of the product and shipping details. If fact, it arrived one day prior to the estimated delivery date. I would absolutely recommend this product and Tech Instrumentation for anyone looking for an indoor/outdoor weather station!


    I needed a replacement as my original sensor no longer worked. This one works fine.

    Excellent Customer Service!

    I can't way enough about the customer service at Tech Instrumentation. I was looking for a hard to find specialty part, which the manufacturer told me would need to be custom made. After calling and speaking with a representative at Tech Instrumentation, the part was located and order was filled, right over the phone. Delivery was prompt, and instrument is working great. Highly recommended company for lab supplies!

    Worked great

    Put batteries in and worked great