The LogTag® TREX-8 is a versatile, wide range, multi-trip Temperature Recorder with interchangeable External Probes, featuring high resolution temperature readings over a measurement range of -40°C to +99°C (-40°F to +210°F).

Readings are downloaded using LogTag® Analyzer which provides facilities for charting, zooming, listing data statistics and allows exporting the data to other applications such as Excel.

The LogTag TREX-8 requires an external Temperature Probe to function correctly. LogTag have a range of FDA food rated high quality ST100 probes for you to select one best suited for your application.

  • A real time clock provides sate/stamps for each temperature reading.
  • Push-to-start button with optional delay or a specific time & date.
  • Comprehensive cutomisation options including alert settings, sample interval and trip duration.
  • Robust and durable polycarbonate case with lug for secure mounting.
  • Up to 8,000 recordings – enough for the longest trip.
  • In-transit inspections can be recorded at the push of a button.
  • Complies with industry standards including FCC, CE, C-TICK, and RoHS.
  • Interchangeable External Probe with high quality gold plated connector.
  • Industry best download time – less than 5 seconds for full memory.
  • Click the ‘Specifications’ tab to view a list of compliance standards.


Product Model TREX-8
External Temperature Sensor

Measurement Range

-40°C to +99°C (-40°F to +210°F).
Operating Temperature Range -40°C to +85°C (-40°F to +185°F).
Storage Temperature Range -10°C to +55°C (14°F to +131°F).
Rated Temperature

Reading Accuracy

Better than ±0.5°C for -10°C to +40°C.

Better than ±0.7°C for -10°C to -30°C & +40°C to +60°C.

Better than ±0.8°C for -30°C to -40°C & +60°C to +80°C.

Better than ±1.0°C for +80°C to +99°C.

Actual performance is typically much better than the rated values. Please see the Rated Absolute Accuracy chart above.

Accuracy figures can be improved by recalibration.

Rated Temperature

Reading Resolution

Less than 0.1°C for -40°C to +40°C.

Less than 0.2°C for +40°C to +80°C.

Less than 0.6°C for +80°C to +99°C.

Please see the Rated Native Resolution chart below. LogTag Analyzer® currently displays to one decimal place of °C or °F.

Sensor Reaction Time Typically less than 2 minutes (T90) in moving air (1m/s) for ST100T, ST100H & ST100S types.
Recording Capacity 8031 temperature readings. 53 days @ 10min logging, 80 days @ 15min logging.
Sampling Interval Configurable from 30 seconds to 18 hours.
Logging Start Options Push button start or specific date & time. Optional start delay of up to 72 hours.
Recording Indication Flashing ‘OK’ indicator / flashing ‘ALERT’ indicator.
Download Time Typically less than 5 seconds for full memory (8031 readings), depending on computer or readout device used.
Environmental IP61
Power Source 3V Li-Mg Battery.
Battery Life 2 – 3 years of normal use (based on 15 minute logging, download data monthly).
Real Time Clock Built-in real time clock.

Rated accuracy ±25ppm @ 25°C (equivalent to 2.5 seconds/day).

Rated temperature coefficient is -0.034 ±0.006ppm/°C (I.e typically +/- 0.00294 seconds/day/°C).

Standard Remote Sensor

Cable Length

Standard: 1.5m (4’11”)

Extended: 3m (9’10”) (Recommended maximum).

Remote Sensor Cable Type PTFE (FDA food contact rated), coaxial
Size 86mm(H) x 54.5mm(W) x 8.6mm(T).
Weight 36g (without External Probe)
Case Material Polycarbonate.