
Glycol Buffer (Buffer Kit [Bottle, Cap, Seal])
The LogTag® Glycol Buffer is used where the temperature of vaccines needs to be monitored during storage or transport.
TREL30-16U
Ultra-Low Temperature External Probe LCD Temperature Data Logger
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Introducing the new TREL30-16U. This external probe, ultra-low temperature monitor features a USB-C connection and includes all the popular enhancements of the TRED30-16U, with the added ability to monitor temperatures as low as -90 °C.
In addition to the traditional 3-pin connection that integrates with the LogTag® LTI-HID interface for data collection, this model introduces a convenient USB-C port, allowing users to quickly and easily retrieve data without the need for a cradle, hub, or software. Simply plug the logger into your computer and CSV and PDF reports are generated automatically.
The TREL30-16U measures and stores over 17,500 temperature readings across a range of -90 °C to +40 °C (-130 °F to +104 °F), with support for both Smart and traditional probes.
The display provides a clear, at-a-glance view of temperature excursions within the current and past 59 days, along with current temperature, time, recording status, and battery life.
Pre-configured with popular freezer alarms, the TREL30-16U is ready to protect sensitive products and samples right out of the box, with no configuration required. Alarms trigger a visual alert by changing the status indicator from a ✓ to an ✗, with the option to enable an audible alert. A day marker also appears to ensure visible tracking of any temperature breaches.
Details of any excursions over 60 days can be reviewed directly on the logger’s display via the statistics history, or in more detail by downloading the logged data using a standard LogTag® Interface cradle and LogTag® Analyzer software.

| Product Model | TREL30-16U (Replaceable Battery) |
|---|---|
| External Temperature Sensor Measurement Range | -90 °C to +40 °C8 |
| Recorder Operating Temperature Range | -30 °C to +60 °C8 |
| Storage Temperature Range | -10 °C to +40 °C 8 |
| 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; Better than ±0.7°C for +10 °C to +30 °C; Better than ±1.0 °C for -80 °C to -50 °C; Better than ±1.0 °C for +30 °C to +40 °C; Better than ±1.8 °C for -90 °C to -80 °C; Actual performance is typically much better than the rated values. |
| Rated Temperature Reading Resolution | 0.1 °C for measurements -80 °C to +10 °C; 0.2 °C for measurements -90 °C to -80 °C; 0.2 °C for measurements +10 °C to +20 °C; 0.3 °C for measurements +20 °C to +30 °C; 0.5 °C for measurements +30 °C to +40 °C; LogTag Analyzer currently displays to one decimal place of °C. The native resolution is what is stored in the LogTag |
| Recording Capacity | 17,526 temperature readings. 60 days @ 5min 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 18 hours |
| 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 (17,526 readings), using USB connection, depending on your computer |
| Environmental | IP61 (when vertically mounted or hung) |
| Power source | 3V CR2032 (LiMnO2 ) coin cell battery, user replaceable |
| Battery Life | 1 year storage, followed by 1 year of operation with normal use (6 minute logging, statistics 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 ±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) |
| Remote Sensor Cable Type | PTFE (FDA food contact rated) coaxial |
| Size | 93 mm(H) x 54.5 mm(W) x 8.6 mm(T) |
| Weight | 43 g without External Probe |
| Case Material | Polycarbonate |
| Standard External Probe Cable Lengths | Standard: 1.5m (4’11”). Extended: 3 m (9’10”) (recommended maximum) |
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The LogTag® Glycol Buffer is used where the temperature of vaccines needs to be monitored during storage or transport.


For all current LogTag® models excluding indicators and UTRED30/UTREL30 loggers

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Medium Tipped Ultra-Low Temperature range Probe. Short cable. 5mm Ø × 60mm long. 1.5 m (4'11")

Medium Tipped Ultra-Low Temperature range Probe. Long cable. 5mm Ø × 60mm long. 3 m (9'10")

Short Tipped Ultra-Low Temperature range Probe. Tiny cable. 5mm Ø × 22.5mm long. 0.5 m (1'8")

Short Tipped Ultra-Low Temperature range Probe. Short cable. 5mm Ø × 22.5mm long. 1.5 m (4'11")

Short Tipped Ultra-Low Temperature range Probe. Long cable. 5mm Ø × 22.5mm long. 3 m (9'10")

Extension Cable for All External Sensors (excluding Smart Probes). Temperature range -46 °C to +74 °C (-50.8 °F to 165.2 °F). 5 m (16'5")
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