LogTag UTREL30-WiFi

Ultra-low Temperature measurement where access requires a remote probe and data needs to be accessed without a PC.

Ultra-low Temperature measurement where access requires a remote probe and data needs to be accessed without a PC.


  • Check and reset Min-Max temperature reading at any time
  • Audible alarm and flashing red LED signals a temperature alarm
  • View alarm status for up to 30 days at a glance
  • Measure and store up 32,000 time/temperature readings (16,000 per channel) – enough for 67 days at 6 minute logging
  • Real-time data automatically uploaded via WiFi to the LogTag Online
  • Two socket external probe with auto channel swap function


The LogTag® UTREL30-WiFi DUAL is a 30 day wifi logger with display, the recommended vaccine monitoring logger e.g. RNA vaccines. This ultra low Temperature Recorder measures and stores up to 30,000 temperature readings (16,000 per channel) over a -90 °C to +40 °C measurement range, using a remote temperature probe. Enough for 67 days at 6 minute logging.

The LogTag® UTREL30-WiFi DUAL temperature data logger automatically uploads real-time temperature data to your LogTag® Online cloud account via your existing wireless network.

The large, easy-to-read display, is designed to show ‘at a glance’ if temperature excursions have occurred during the current day and up to the previous 30 days. The display also shows the current temperature reading, the current time, recording status and battery status.

The alarm is triggered if temperature readings are outside pre-set alarm limits. The status indicator changes from a ✔ to a X, the red LED is flashing 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 excursion 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 LogTag® Analyzer operating software.


Automatic PDF Report

The UTREL30-WiFi DUAL connects to a computer USB port for easy configuration by the user for a wide range of recording and alert conditions. Upon download, it automatically generates a fully detailed PDF report with the option to download the data using the freely available LogTag®Analyzer software for a more detailed analysis. A red alarm indicator together with X shown on display provides an immediate indication - without access to a PC - if any readings are outside the limits specified at the time the unit was configured.
Automatically generates an encrypted LogTag data file - for a more detailed analysis and to comply with FDA CFR21 Part 11.


Product Model UTREL30-WiFi
Recorder operating temperature range 30 °C to +60 °C (-22 °F to +140 °F)
Storage Temperature Range 10 °C to +40 °C (32 °F to +104 °F)
Rated Temperature reading accuracy Better than ±0.5 °C for -20 °C to +10 °C (-4 °F to 50 °F) Better than ±0.7 °C for -50 °C to -20 °C (-58 °F to -4 °F) and +10 °C to +30 °C (50 °F to 86 °F) Better than ±1 °C for -80 °C to -50 °C (-112 °F to -58 °F ) and +30 °C to +40 °C (86 °F to 104 °F) Better than ±1.8 °C for -90 °C to -80 °C (-130 °F to -112 °F)
Rated Temperature Reading Resolution 0.1 °C (0.2 °F) for measurements -80 °C to 10 °C (-112 °F to 50 °F) 0.2 °C (0.4 °F) for measurements 10 °C to 20 °C (50 °F to 68 °F) and -90 °C to -80 °C (-130 °F to -112 °F) 0.3 °C (0.5 °F) for measurements 20 °C to 30 °C (68 °F to 86 °F) 0.5 °C (0.9 °F) for measurements 30 °C to 40 °C (86 °F to 104 °F) LogTag Analyzer currently displays to one decimal place of °C or °F. The native resolution is what is stored in the LogTag®.
Sensor Reaction Time Typically less than 2 minutes(T90) in moving air (1m/s) for ST10S type
Recording Capacity 16,129 temperature readings. 67 days at 6 minute logging. Day summary statistics memory (for display on LCD): up to 30 days of Min/ Max/duration and alarm trigger statistics
Download Time Typically with full memory (16,129 readings) in less than 10 seconds
Environmental IP51 (when vertically mounted or hung with USB dust-cap in place)
Power source 5V via micro USB socket or, 2 x 1.5V AAA batteries. CR2032 LiMnO2 coin cell (backup logging function only)
Battery Life Device should normally be powered via USB. AAA batteries provide backup power for up to 2 months
Connection Interface USB 2.0 / Micro-USB plug
Size 141 mm(H) x 72 mm(W) x 18 mm(T)
Weight 158 g with AAA batteries, (134g - excluding probe and AAA batteries)
Sampling Interval Configurable from 30 seconds to 18 hours
Logging Start Options Push button start (with configurable start delay from 1 minute to 72 hours) or specific date & time
Case Material Polycarbonate
External Temperature Sensor Measurement Range -90 °C to +40 °C (-130 °F to +104 °F)
Probe Connectivity Up to 2
Probe Compatibility All ST100 precision thermistor external probes can be interchangeably connected to the UTREL30-WiFi. Please refer to the page for External Probes on the LogTag North America website
Calibration Factory calibrated using NIST equivalent reference equipment. Calibration certificate available on request
WiFI 802.11 b/g/n
Bluetooth Bluetooth® V4.2 BR/EDR and Bluetooth LE®

Receive real-time notifications with LogTag Online

LogTag Online is a secure, cloud-based application for managing & sharing your temperature data via a role-based permission system. A wide range of features include: Real-time alarm notifications; Location monitoring; Temperature logs and troubleshooting records. No installed software is required and LogTag Online is accessible via any internet-enabled device.

Wall Mount Bracket WMB-02
Wall Mount Bracket WMB-02

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