

The UTREL30-WiFi is an automatic temperature logger that uploads real-time data to your LogTag® Online account via your existing Wi-Fi network. It stores up to 32,000 temperature values, including statistical data on the highest, lowest, and alert times for the past 30 days. With its large, easy-to-read display and familiar LogTag® features, the UTREL30-WiFi provides an effective temperature monitoring solution. A non-Wi-Fi version is also available.
| Parameter | Details |
|---|---|
| Product Model | UTREL30-WiFi |
| External Sensor Measurement Range | -90°C to +40°C (-130°F to +104°F) |
| 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) |
| Temperature Resolution | Better than 0.1°C (0.2°F) from -30°C to +60°C (-22°F to +140°F) Better than 0.2°C (0.4°F) from -40°C to -30°C (-40°F to -22°F) Better than 0.5°C (0.9°F) from +60°C to +99°C (+140°F to +210°F) |
| Temperature Accuracy | Better than ±0.5°C from -20°C to +10°C (-4°F to +50°F) Better than ±0.7°C from -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 from -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 from -90°C to -80°C (-130°F to -112°F) |
| Probe Connection | Up to 2 probes |
| Probe Compatibility | Compatible with all external ST100 temperature probes. Refer to LogTag North America website for probe details. |
| Recording Capacity | Total memory: 32,000 readings 16,000 temperature readings per channel Daily summary statistics (LCD display): up to 30 days of Min/Max/duration and alarm events |
| Sampling Interval | Configurable from 30 seconds to 18 hours |
| Start Options | Push-button start (with configurable delay from 1 minute to 72 hours) or scheduled date/time start |
| Download Time | Typically less than 10 seconds for full memory (32,130 readings) |
| Environmental Rating | IP61 (when mounted vertically or hung) |
| Calibration | Factory calibrated using NIST-traceable reference equipment. Calibration certificate available upon request |
| Power Supply | 5V via Micro USB or 2 × AAA 1.5V alkaline batteries CR2032 3V LiMnO₂ (backup logging only) |
| Battery Life | Typically powered via USB. AAA batteries provide backup power up to 2 months |
| Interface | USB 2.0 / Micro USB |
| WiFi | 802.11 b/g/n |
| WiFi Security | Open, WPA2/PSK (with or without PMF), EAP-PEAP, EAP-TTLS |
| Bluetooth® | Bluetooth® V4.2 BR/EDR and Bluetooth LE® |
| Dimensions | 141 mm (H) × 72 mm (W) × 18 mm (D) |
| Weight | 158 g (with AAA batteries) / 134 g (without probe and batteries) |
| Housing Material | Polycarbonate |
Ultra-low temperature monitoring (down to -90°C)
Ideal for ultra-cold chain applications such as mRNA vaccines, pharmaceuticals, and biological materials.
Dual-channel measurement
Supports two independent probes for monitoring multiple locations simultaneously.
Automatic WiFi connectivity
Data is uploaded in real-time to LogTag Online for remote monitoring without manual USB connection.
Large LCD display
Shows current temperature, Min/Max values, and alarm status for up to 30 days, enabling quick on-site checks.
Reliable power system
Supports both external DC power (via USB) and AAA battery backup to ensure continuous operation.
