LogTag TREL-8 - External Probe Low Temp Logger | -90°C to +40°C


  • External Probe with high quality gold plated connector
  • Records temperature from +40°C to as low as -90°C.
  • Versatile, wide range, multi-trip temperature logger.
  • 8000 readings memory capacity with up to 3 years battery life.
  • ‘OK’ & ‘ALERT’ Indicator with high and low customizable alarms.

The TREL-8 Low Temperature Remote Probe Logger measures and stores up to 8000 temperature readings over -90°C to +40°C (-130°F to +104°F) measurement range from associated interchangeable LogTag® ST10 type remote probe temperature sensor (available in lengths up to 3 meters (9’10”).

It is intended for use in monitoring of articles stored at low temperatures such as in dry ice type environments. Using the LogTag® Interface Cradle and LogTag’s freely available companion software LogTag® Analyzer.

TREL-8 is easily configured for recording conditions including delayed start, sampling interval, number of readings and configuration of conditions to activate the ALERT indicator. 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 Red Alert indicator provides an immediate indication, without access to a PC, if any readings are outside the limits specified at the time the unit was configured. Green OK indicator provides immediate visual confirmation, without access to a PC, that the unit is operating.


Product ModelTREL-8.
Sensor Measurement Range-90°C to +40°C (-130°F to +104°F).
Operating Temperature Range-20°C to +40°C (-4°F to +104°F).
Storage Temperature Range-10°C to +55°C (14°F to +131°F).
Rated Temperature Reading Accuracy With the logger case sitting in an environmental temperature between 0°C and 50°C:
Better than ±1°C (±1.8°F) for -30°C to +20°C (-22°F to +68°F).
Better than ±1.2°C (±2.1°F) for -45°C to -30°C (-49°F to -22°F) and +20°C to +40°C (+68°F to +104°F).
Better than ±1.7°C (±3.1°F) for -80°C to -45°C (-112°F to -49°F).
Better than ±2.0°C (±3.6°F) for -90°C to -80°C (-130°F to -112°F).
Actual performance is typically much better than the rated values. Please see the Rated Absolute Accuracy chart below.
Accuracy figures can be improved by recalibration.
Rated Temperature Reading Resolution 0.1°C (0.2°F) for measurements -80°C to 0°C (-112°F to 32°F).
0.2°C (0.4°F) for measurements 0°C to 18°C (32°F to 64.4°F) and -90°C to -80°C (-130°F to -112°F).
0.3°C (0.5°F) for measurements 18°C to 30°C (64.4°F to 86°F).
0.5°C (0.9°F) for measurements 30°C to 40°C (86°F to 104°F).
Please see the Rated Native Resolution chart below.
LogTag Analyzer® currently displays to one decimal place of °C or °F. The native resolution is what is stored in the LogTag®.
Sensor Reaction TimeTypically less than 2 minutes (T90) in moving air (1m/s) for ST10S type.
Recording Capacity8031 temperature readings. 53 days @ 10min logging, 80 days @ 15min logging.
Sampling IntervalConfigurable from 30 seconds to several hours.
Logging Start OptionsPush button start with optional start delay or specific date & time.
Recording IndicationFlashing ‘OK’ indicator / flashing ‘ALERT’ indicator.
Download TimeTypically less than 5 seconds for full memory (8031 readings), depending on computer or readout device used.
Power SourceCR2450 3V LiMnO2 Battery (Fixed).
Battery Life1 year storage, followed by 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 Probe Cable LengthsStandard: 0.5m (19”).
Extended: 3m (9’10”) (recommended maximum).
Remote Probe Cable TypePTFE (FDA food contact rated) coaxial.
Size86mm(H) x 54.5mm(W) x 8.6mm(T).
Case MaterialPolycarbonate.

Compliance and Certifications
FDA CFR21 Part 11 FCC EMC Directive CE EMC Directives Conforms to RoHS

View other LogTag® products