digital temperature humidity recorder

digital temperature humidity recorder

TR-77Ui temperature and humidity data logger


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Product ID: Tecpel TR-77Ui

The TR-77Ui is our innovative temperature and humidity data logger designed to measure and record in a wider range with more precision than ever before. It reaches the high measurement accuracy of ±2.5%RH and can measure and record in the range of 0 to 99%RH (at temperatures from -30 to 80°C).

The product is an all-in-one package that includes the data logger unit, sensor and software. 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.

  • TR-77Ui Specification
    • Humidity Measurement Range 0%RH to 99%RH
    • Temperature Measurement Range -30°C to 80°C
    • Humidity Measurement Resolution 0.1%RH
    • Humidity Measuring Accuracy 10 to 40°C: ±0.3°
    • At all other temperatures: ±0.5°C
    • Humidity Measuring Accuracy ±2.5%RH (25°C, 10%RH to 85%RH)
    • Humidity Sensor Response Time About 20 sec. (90% response)
  • Funciton
    • Measure and Record Temperature and Humidity in a Wider Range with Greater Accuracy Improved Sensor DurabilityExtend Sensor Cable up to 10 MetersEasy-to-Use USB Computer ConnectionLarge Data Capacity: 8,000 Readings x 2 ChannelsSimultaneously View Multiple Channels of Data in Trend GraphAdjustment Function Equipped Slim, Lightweight and Compact 10 Months of Operation with just 1 AA Alkaline Battery Reliable Data Protection
  • Application
    • For managing Temperature and Humidity in Pharmaceutical Companies and Research Institutes
    • * For evaluating Heat and Humidity Retention in Homes and Office Buildings
    • * For managing Temperature and Humidity in Server Rooms
    • * For Temperature and Humidity Management in Hospitals, Museums, and Temperature Controlled Warehouses
    • * For managing Temperature and Humidity in Wine Production and Storage
    • * Management of Temperature and Humidity in Subway and Train Cars
    • * For managing Temperature and Humidity in Clean Rooms and Environmental Testing Facilities
Graphs can be opened for the same number of Units as are connected and can be viewed simultaneously.

Simultaneously View Multiple Channels of Data in Trend Graph
With our exclusive software, it is possible not only to monitor the current measurements, but also to view those measurements in a continually changing graph on your computer display at the same time. 
See more complete detail
*5) If necessary, serial communication can be established by using our TR-77Ui communication protocol (contact your local dealer) to write a software program. In this case, it will be necessary to connect to your computer using our optional serial communication cable (TR-07C). Please contact the dealer where the product was purchased or the T&D Sales Department. 
Measurement Items Temperature Humidity
Number of 
Measurement Channels
2 Ch (1 Temperature / 1 Humidity)
Measurement Range -30 to 80°C 0 to 99%RH
Measuring Accuracy(*1) ±0.3°C [10 to 40°C]
±0.5°C [all other temperatures]
±2.5%RH [at 25°C and 10% to 85%RH]
±4.0%RH [at 25°C and 0% to 10%RH or 85% to 99%RH]
Add ±0.1%RH/°C (When at other than 25°C, add to the accuracy noted above)
Humidity Hysteresis - ±1.5%RH or lower(*2)
Measurement / 
Display Resolution
0.1°C 0.1%RH
Sensor A Platinum Resistance Sensor Electrostatic Capacitance Type
Recording Interval Select from 15 choices: 1, 2, 5, 10, 15, 20, 30 sec. / 1, 2, 5, 10, 15, 20, 30, 60 min.
Logging Capacity(*3) 8,000 data sets
Recording Modes Endless Mode
(Overwrite oldest data when capacity is full)
One Time Mode
(Stop recording when capacity is full)
LCD Displayed Items Measurements (Ch.1 only, Ch.2 only, alternating display) / Measurement and Recording Status / Battery Life Warning / Amount of Recorded Data / Unit of Measurement
Power 1 AA Alkaline Battery (LR6)
Battery Life(*4) About 10 months
Interface USB Communication, Serial (RS-232C) Communication(*5)
USB Communication 
When downloading 1 Unit at full logging capacity: about 8 sec.
Dimensions / 
Weight of TR-77Ui Unit
H55 x W78 x D18 mm / about 62 g (including 1 AA battery)
Operating Environment Temperature: -10 to +60°C / Humidity: under 90%RH (no condensation)
Attached Sensor HHA-3151 x 1
Included in Package
AA alkaline battery LR6 x 1
USB Communication Cable x 1
US-15C; length 1.5m
Software (CD-ROM) / Hardware User's Manual (Warranty) / Software User's Manual

*1) When used at temperatures equal to or higher than 0°C, the Humidity Measuring Accuracy will be as shown here.
*2) When used at temperature / humidity equal to or lower than the following: 50°C/75%RH, 60°C/50%RH, 70°C/35%RH, 80°C/25%RH
*3) One data set consists of readings for all channels in that type of unit.
*4) Battery life varies depending upon the type of battery, the measuring environment, the frequency of communication, and the ambient temperature in which it is used.When infrared communication function is enabled, battery life may be shortened if the unit is used under the inverter type fluorescent lighting.
  • CE
Order Information:
  • Minimum Order: Negotiable
  • FOB: Taiwan

Contact Detail

Contact:Stanley Hwang