Logtag TRED30-7 External Probe Temperature Logger With Display


An economical option for monitoring refrigerators, incubators, cold rooms, etc where the sensor is located inside the chamber and the logger with display outside, LogTag TRED30-7 Temperature Recorder measures and stores up to 7770 temperature readings over the temperature range of -40°C to +99°C. The device features a large display that allows one to review if temperature violations have occurred in the last 24 hours and this can be done ‘at a glance’ for the previous 29 days also. The display shows the current temperature reading, the current time, recording status and battery status.

A special feature of this device is the ability to view at a glance, the day numbers when there was an alarm excursion. One can then, using the Review button, review the minimum and maximum values for the days in question or for all the last 30 days for which data has been recorded.

Two different battery options are available. TRED30-7R has a user replaceable battery with typical battery life of 1 year. TRED30-7F has a non user replaceable battery with typical battery life of 2-3 years.

  • Day alarms summary – Displays, in calendar-like format, alarm triggers for up to the last 30 days
  • Rapid Download! Takes only seconds to download recordings
  • Push Button Logging start with optional delayed start or specific Time & Date start
  • Pre-Start logging – Logtag can be configured to record even if it has not been started.
  • Thin flat case – Fits easily into packaging and thin enough to be easily mailed “letter rate basis”
  • Interchangeable Remote Probes – LogTag® remote temperature probes are interchangeable provided they are changed with LogTag® ST100 type remote temperature sensors.
  • Easy to use LogTag Analyzer software that runs on any PC configures LogTag for recording then downloads resulting data for analysis. Data can also be exported to formats compatible with other applications such as Excel
  • Re-calibration to achieve higher accuracy possible

Battery life
TRED30-7R : typically 1 year of operation TRED30-7F : typically 2+ years of operation NOTE: Typical battery life assumes 6 minute logging, day statistics are reviewed on the display no more that once daily for no longer than 30 seconds each time. Download data monthly.
Data logging memory : 7770 logs ( 53 days @ 10min logging, 80 days @ 15min logging) Day summary statistics memory (for display on LCD): up for 30 days of Max/Min and duration values
Case Material
Download Time
Typically with full memory (7770 readings) in less than 5 secs depending on computer or readout device used.
Logging start options
Push button start or specific date & time. Optional start delay of up to 18hours.
TRED30-7R: (replaceable battery)
TRED30-7F: (fixed battery)
Other features
  • Optional clearing of alarm indication by push button (places inspection mark at same time)
  • Download inspection mark recorded in LogTag memory every time LogTag is downloaded
  • 'Prestart' fail-safe logging (records temperature data even if not started)
  • Low battery indication
  • Comprehensive Alarm trigger configuration
  • Calibration to achieve higher accuracy possible
Power source
3V Lithium-Manganese Dioxide extended temperature chemistry
Rated Temperature reading accuracy
Better than ±0.5°C (±0.9°F) for -20°C~+40°C (-22°F~+104°F) -typically ±0.3°C (0.6°F)
Better than ±0.8°C (±1.5°F) for -40°C~-20°C (-40°F~ -22°F) - typically ±0.5°C (0.9°F)
Better than ±0.8°C (±1.5°F) for +40°C~+70°C (-104°F~+158°F) - typically ±0.7°C (0.9°F)
Better than ±1.2°C (±1.5°F) for +70°C~+99°C (-158°F~+210°F) - typically ±1°C (0.9°F).
Reader interface
Standard LogTag Interface cradle
Recorder operating temperature range
-30°C ~ +60°C (-22°F ~ +140°F)
Recording indication
State indicator "RECORDING"
Remote Sensor Measurement Range
-40°C ~ +99°C (-40°F ~ +210°F)
Remote Temperature probes
Standard LogTag® ST100 temperature probes (Standard lengths 1.5m (4’11”) or 3m (9’10”)
Sampling frequency
adjustable, 30 seconds to several hours
Sensor reaction time
T90 typically less than 2 minutes in moving air (1m/s) for ST100T,ST100H & ST100S types.
  • TRED30-7R: 41grams
  • TRED30-7F: 44 grams

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