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LogTag® TREL30-16 Low Temperature at a Glance


Monitoring of articles stored at very low temperatures such as in dry ice type environments, where a remote probe is beneficial.


Product Summary

The display is designed to show ‘at a glance’ if temperature excursions have occurred during the current day and up to the previous 29 days. The display also shows the current temperature reading, the current time, recording status and battery status.

The alarm is trigged if temperature readings are outside pre-set alarm limits. The status indicator changes from a ✔ to a ✖ and, if configured, the audible alarm will sound. The day marker will also appear if not already present.

The alarm status indicator and audible alarm can be easily cleared, but the day marker remains to ensure a visible record of excursions is shown on the display. A simplified alarm clearance, stop & start procedure is available as an option.

Details of any excursions in the preceding 30 days can be checked directly by inspecting the statistics history on the recorder’s display or in more detail by downloading the logged data via a standard LogTag® Interface cradle to LogTag® Analyzer operating software.


Product Highlights

  • Built-in audible alarm.
  • New, easy to read LCD display with 30 day summary in calendar format.
  • Up to 15,900 recordings - Enough memory for 66 days at 6 minute logging.
  • Auto-pause function - unplugging the external probe automatically suspends alarm & statistics processing
  • Record inspections at the push of a button.
  • Interchangeable External Probe with high quality gold plated connector.
  • Comprehensive customisation options including alarm settings, sample interval and trip duration

Technical Specifications

Part Order Code TREL30-16 (Replaceable Battery).
External Temperature Sensor Measurement Range -90 °C to +40 °C
Operating Temperature Range -30 °C to +60 °C
Storage Temperature Range -10 °C to +40 °C
Rated Temperature
Reading Accuracy

Better than ±0.5 °C for -20 °C to +10 °C
Better than ±0.7 °C for -50 °C to -20 °C and +10 °C to +30 °C
Better than ±1 °C for -80 °C to -50 °C
Better than ±1,8 °C for -90 °C to -80 °C
Actual performance is typically much better than the rated values.
Accuracy figures can be improved by recalibration.

Rated Temperature
Reading Resolution
Less than 0.1 °C for -80 °C to 0.0 °C,
Less than 0.2 °C for 0.0 °C to +18 °C,
Less than 0.3 °C for +18 °C to +30 °C,
Less than 0.5 °C for +30 °C to +40 °C
Please see the Rated Native Resolution chart above.
LogTag Analyzer® currently displays to one decimal place of °C or °F. The native resolution is what is stored in the LogTag®
Recording Capacity 15,905 temperature readings.
66 days @ 6 min logging
Day summary statistics memory (for display on LCD): up for 30 days of Max/Min/duration and alarm trigger statistics.
Sampling Interval Configurable from 30 seconds to hourly
Logging Start Options Push button start or specific date & time. Optional start delay of up to 18hours.
Recording Indication State indicator “REC”
Download Time Typically less than 10 seconds for full memory (15,905 readings), depending on computer or readout device used.
Environmental IP 61 (when vertically mounted or hung).
Power Source 3 V CR2032 (LiMnO2) coin cell battery, user replaceable
Battery Life Typically 1 year of operation.
NOTE: Typical battery life assumes 6 minute logging, day statistics are reviewed on the display no more than once daily for no longer than 30 seconds each
time. Download data monthly.
NOTE: Continual activation of the audible alarm will reduce the working life of the battery. When an alarm is triggered, the alarm should be cleared and reset
as soon as possible.
Real Time Clock Built-in real time clock.
Rated accuracy ±25 ppm @ 25 °C (equivalent to 2.5 seconds/day).
Rated temperature coefficient is -0.034 ±0.006 ppm/ °C (I.e typically +/- 0.00294 seconds/day/°C)
Standard External Probe
Cable Lengths
Standard: 0.5 m (19 ””).
Extended: 3 m (9’10 ”) (recommended maximum)
Remote External Probe Type PTFE (FDA food contact rated) coaxial.
Size 93 mm (H) x 54.5 mm (W) x 8.6 mm (T)
Weight 41 g without External Probe.
Case Material Polycarbonate.
LogTag® Recorders reserves the right to change this product’s specifications without notice.

Remote Probe Options

LogTag® TREL is designed and calibrated for use with the LogTag® ST10S remote temperature probe. Only this probe is compatible with TREL and using any other probe type is likely to cause an error in readings.

LogTag® ST10S sensors are designed and calibrated for interchangeability with TREL loggers to the standard rated accuracy of the product. If a TREL/ST10S probe combination is calibrated to a higher level of accuracy (as is possible) then care should be taken to always use the same TREL/ST10S combination for measurements as the ST10S sensor is not rated interchangeable at accuracies better than the TREL/ST10S rating in this specification.

Identifying an ST100 probe

The ST10S probe is distinguished from other LogTag® remote temperature probe types by the green sleeve color on the sensor’s plug.

ST10S-05 (0.5 m)
ST10S-30 (3 m)

Short tipped probe

The tipped probe incorporates a 22 mm exposed length of 5 mm OD 316 stainless probe without handle but with small over mold to improve resistance to moisture and provide cable strain relief.
All materials at probe end of cable are FDA food rated including the cable.
Supplied standard (part# ST10S-05) with 0.5 m or extended (part#ST10S-30) with 3 m cable terminated to MCX plug for plugging into LogTag® TREL.

STX-50 (5.0 m)

External sensor extension cable

The STX-50 is a 5 meter (~16’ 5”) extension cable for extending ST10 or ST100 external temperature sensors.

The socket end of the cable (which accepts the ST100 or ST10 sensor plug) is fitted with a flexible sleeve that when the ST sensor’s plug is in place will protect the mated connection to IP61.

Data Sheet STX-50