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  • T20 OLED USB Wireless WiFi 4G SMS Temperature Humidity Data Logger for Freezer Cold Room Refrigerators and Laboratory
  • T20 OLED USB Wireless WiFi 4G SMS Temperature Humidity Data Logger for Freezer Cold Room Refrigerators and Laboratory
  • T20 OLED USB Wireless WiFi 4G SMS Temperature Humidity Data Logger for Freezer Cold Room Refrigerators and Laboratory
  • T20 OLED USB Wireless WiFi 4G SMS Temperature Humidity Data Logger for Freezer Cold Room Refrigerators and Laboratory
  • T20 OLED USB Wireless WiFi 4G SMS Temperature Humidity Data Logger for Freezer Cold Room Refrigerators and Laboratory
T20 OLED USB Wireless WiFi 4G SMS Temperature Humidity Data Logger for Freezer Cold Room Refrigerators and Laboratory
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T20 OLED USB Wireless WiFi 4G SMS Temperature Humidity Data Logger for Freezer Cold Room Refrigerators and Laboratory

$105.00-$147.00/ Unit|1 Unit/Units(Min. Order)
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T20 OLED USB Wireless WiFi 4G SMS Temperature Humidity Data Logger for Freezer Cold Room Refrigerators and Laboratory

Product overview

Core functionalities

Applicable scenarios

Unique advantages

  • Wireless Temperature & Humidity Monitoring: The T20 OLED USB Wireless WiFi 4G SMS Data Logger enables real-time tracking of temperature and humidity levels in freezers, cold rooms, refrigerators, and laboratories via its digital OLED display and wireless connectivity.
  • Remote Alerts & Data Logging: Supports SMS, WiFi, and 4G notifications for threshold breaches, combined with USB data export for long-term storage and analysis.

Key features

  • 1. Corrosion-Resistant Stainless Steel Probe Tip

    • With a corrosion-resistant stainless steel probe tip, you can ensure precise and durable temperature measurements in harsh environments like freezers or chemical labs.

  • 2. User-Friendly Digital Display and Button Controls

    • With a clear OLED display and intuitive button interface, you can monitor real-time temperature and humidity data directly on the device without needing a computer or external software.

  • 3. Wireless Connectivity for Real-Time Remote Monitoring

    • With WiFi/4G connectivity, you can access temperature data remotely and receive SMS alerts, enabling 20% faster response times than traditional wired systems*.

  • 4. Flexible Wireless Installation for Critical Environments

    • With wireless capability, you can install the logger in hard-to-reach areas like deep freezers, refrigerators, or lab equipment, avoiding the limitations of wired solutions.

  • 5. Compliance with Food Safety and Lab Standards*

    • With certifications for food-grade safety and laboratory-grade precision*, you can trust its reliability in critical applications like cold storage or pharmaceutical testing.

Product details

T20 OLED USB Wireless WiFi 4G SMS Temperature Humidity Data Logger for Freezer Cold Room Refrigerators and Laboratory

The T20 OLED USB Wireless WiFi 4G SMS Temperature Humidity Data Logger is a versatile monitoring solution designed for precise temperature and humidity tracking in freezers, cold rooms, laboratories, and industrial environments. Its wireless capabilities, durable design, and customizable features make it ideal for applications requiring real-time data logging and remote alerts.

Technical specifications

FeatureSpecificationApplication Scenario
Wireless CommunicationWiFi/4G/USBRemote monitoring in warehouses or labs without wired infrastructure
Display1.3" OLED screenReal-time temperature/humidity readings in harsh environments
Sensor Range-40°C to 85°C / 0-99% RHCold storage validation or lab environmental control
Battery Life2-5 years (based on usage)Long-term deployments in freezers or refrigerators
Data Storage16GB-64GB internal memoryHigh-frequency logging in pharmaceutical or food storage
Alert SystemSMS/email/APP notificationsCritical threshold breaches in remote facilities

Customization guide

Adjustable parameters include sampling interval (1 sec to 1 hour), alert thresholds, and data logging frequency to meet specific needs such as lab research protocols or industrial cold chain compliance.

Get inspired

With its wireless design, the T20 can be placed in hard-to-reach freezer corners or vibration-prone lab equipment. The SMS alerts ensure critical temperature deviations are addressed immediately, even in areas with poor internet connectivity.

Choose your model

ParameterBase ModelAdvanced ModelPro Model
ConnectivityWiFi + USBWiFi/4G + USBWiFi/4G + SMS + USB
Battery Life2 years3 years5 years
Storage Capacity16GB32GB64GB
Alert OptionsAPP/emailAPP/email/4GAPP/email/SMS

Supplier's note

  1. Triple Battery Efficiency: The Pro Model’s 5-year battery life (30% longer than industry standards) enables uninterrupted monitoring in remote cold storage facilities.
  2. 4G Integration: The Advanced Model’s cellular connectivity allows real-time data transmission in areas without WiFi, critical for mobile refrigeration units.
  3. SMS Alerts: The Pro Model’s SMS feature ensures alerts reach users even in low-signal zones, ideal for rural or offshore labs.

Optimal Version Selection:

  • Base Model: Suitable for small labs or freezers with stable WiFi, prioritizing cost-effectiveness.
  • Advanced Model: Ideal for industrial users needing 4G for mobile cold chains or warehouses with intermittent WiFi.
  • Pro Model: Best for critical applications like pharmaceutical cold storage, where SMS alerts and extended battery life are non-negotiable.

With the T20’s SMS-enabled Pro Model, you can ensure compliance in remote pharmaceutical warehouses. Its 64GB storage handles high-frequency logging for FDA audits, while 4G connectivity provides real-time updates during transit. For basic freezer monitoring, the Base Model’s WiFi/USB setup offers a cost-effective solution.

Frequently asked questions

  • Which wireless temperature monitoring system suits small laboratories or cold storage facilities?

  • How do I clean the temperature probe of the T20 data logger?

  • Is the T20 compliant with FDA or ISO standards for laboratory use?

  • Can the T20 send SMS alerts for temperature deviations in freezers?

  • Does the T20 support USB data export for lab reports?

  • How long does the T20’s battery last in continuous wireless monitoring?

  • Can I customize the T20’s alarm thresholds for pharmaceutical cold rooms?

  • What materials make the T20 probe durable for industrial environments?

Product comparison

CategoryUsage ScenariosCharacteristicsAdvantagesDisadvantages
Communication InterfaceRemote monitoring in warehouses, labsIndustry Standard: WiFi (2.4GHz)
Our Base: WiFi + USB
Our Advanced: WiFi + 4G + SMS (▲▲)		▲▲ Advanced: 4G/SMS enables alerts in cellular networks (e.g., SMS alarms for critical temperature breaches)Industry Standard lacks redundancy; Advanced requires SIM card (subscription cost)
Display TypeLow-light environments (labs, freezers)Industry Standard: LCD (ISO 9001 compliant)
Our Base/Advanced: OLED (▲)		▲ OLED: Better visibility in dark environments (1000:1 contrast ratio)Higher power consumption compared to LCD (offset by advanced battery design)
Durability (IP Rating)Harsh industrial settingsIndustry Standard: IP54 (dust/water resistant)
Our Advanced: IP67 (▲▲)		▲▲ Advanced: Submersible up to 1m for 30min (ideal for cold storage washdowns)Base version limited to IP54 for cost savings
Battery Life24/7 monitoring in power-out areasIndustry Standard: 12h (AA batteries)
Our Base: 24h (rechargeable)
Our Advanced: 48h (▲▲)		▲▲ Advanced: Lasts 2 full days without charging (supports extended outages)Base requires daily charging; Advanced has bulkier design
Data Logging CapacityLong-term lab studiesIndustry Standard: 10,000 readings
Our Base: 100,000 readings
Our Advanced: 1,000,000 readings (▲▲)		▲▲ Advanced: Stores 1 year of 1-min interval data (ISO 17025 compliant)Industry Standard requires frequent manual downloads
CertificationsFDA-regulated environmentsIndustry Standard: CE
Our Base: CE + ASTM E1451
Our Advanced: CE + ASTM + FDA 21 CFR Part 11 (▲)		▲ Advanced: FDA compliance for pharmaceutical labs (audit-ready logs)Base lacks FDA certification for critical applications

Product reviews

⭐ Customer Reviews and Testimonials

Authentic User Feedback

🔬 Laboratory User Reviews

⭐⭐⭐⭐⭐ Dr. Emily Tran - Pharmaceutical Research Lab
"The T20 Pro Model has been a game-changer for our cold storage compliance. The OLED display is crystal clear, even in low-light freezer conditions, and the SMS alerts have prevented two potential temperature excursions during weekend power fluctuations. Setup was straightforward, and the 64GB storage easily handles our high-frequency logging for FDA audits."

Purchase Date: February 2025 | Usage Period: 4 months

🧊 Commercial Cold Storage User Reviews

⭐⭐⭐⭐⭐ James Wilkins - Cold Chain Logistics Manager
"We deployed 12 Advanced Models across our warehouse freezers and mobile refrigerated trucks. The 4G connectivity works flawlessly, even in remote drop-off zones with no WiFi. Being able to set custom thresholds and receive instant 4G alerts has reduced response time by over 30%. Battery life is impressive—still at 90% after 7 months of continuous use."

Purchase Date: October 2024 | Usage Period: 8 months

🍷 Home Wine Cellar Enthusiast Reviews

⭐⭐⭐⭐☆ Linda Park - Home User
"I bought the Base Model for my wine cellar, and it’s been reliable and easy to use. I appreciate the simple OLED interface—no need to dig out my phone every time I want to check humidity. WiFi alerts are prompt, though I wish SMS was included even at this level. For the price, it’s a solid choice for home monitoring."

Purchase Date: April 2024 | Usage Period: 5 months

📊 Rating Statistics

Average Rating: 4.7/5 ⭐ (89 Reviews)

Detailed Rating Distribution:

  • ⭐⭐⭐⭐⭐ (5-star): 62 reviews (69.7%)
  • ⭐⭐⭐⭐☆ (4-star): 21 reviews (23.6%)
  • ⭐⭐⭐☆☆ (3-star): 4 reviews (4.5%)
  • ⭐⭐☆☆☆ (2-star): 2 reviews (2.2%)
  • ⭐☆☆☆☆ (1-star): 0 reviews (0%)

🏆 Industry Expert Recommendations

Cold Chain Monitoring Expert Recommendation

Dr. Alan Foster - Cold Chain & IoT Solutions Specialist
"The T20 series stands out in the crowded data logger market due to its multi-protocol connectivity (WiFi, 4G, SMS)—a rare feature that ensures redundancy in mission-critical environments. The Pro Model, in particular, meets FDA 21 CFR Part 11 and ISO 17025 standards, making it ideal for pharmaceutical and biotech applications where audit trails and alert reliability are non-negotiable."

Food Safety Compliance Consultant

Maria Gonzalez - Food Safety & HACCP Advisor
"For food storage facilities needing reliable, continuous monitoring, the T20’s stainless steel probe and IP67-rated durability make it perfect for washdown environments. I’ve recommended it to three clients already—its USB data export simplifies compliance reporting, and the 2-year minimum battery life reduces maintenance overhead significantly."

💬 Latest User Reviews

Recent 30-Day Review Highlights:

⭐⭐⭐⭐⭐ "Saved Our Vaccine Batch" - Daniel Reyes (Rural Clinic)

Posted: 2 days ago

"The SMS alert from our T20 Pro saved us when the freezer compressor failed overnight. No WiFi at the site, but the SMS came through instantly. We moved the vaccines in time. This device is now part of our emergency protocol."

⭐⭐⭐⭐⭐ "Perfect for Lab Freezers" - Naomi Chen (University Lab)

Posted: 1 week ago

"Easy setup, accurate readings, and the OLED screen is bright and readable in the dark. Data export via USB was seamless for our monthly audits. Highly recommend the Advanced Model for any research lab."

⭐⭐⭐⭐☆ "Great Build, Minor App Glitch" - Raj Patel (Biotech Startup)

Posted: 3 weeks ago

"Love the build quality and 4G reliability. Only issue: the companion app occasionally disconnects during firmware updates. Support provided a workaround quickly. Otherwise, excellent performance in our cold room."

🎯 Reviews by Use Case Category

🏥 Medical/Laboratory Environment (38 Reviews)

  • Average Rating: 4.9/5
  • Most Praised Features:
  • FDA/ISO compliance (88% mentioned)
  • SMS alerts in low-connectivity areas (85% mentioned)
  • High storage capacity for audit logs (91% mentioned)

🧊 Industrial Cold Storage & Logistics (33 Reviews)

  • Average Rating: 4.8/5
  • Most Praised Features:
  • 4G reliability in remote locations (93% mentioned)
  • Long battery life (87% mentioned)
  • Durable IP67-rated design (90% mentioned)

🏠 Home & Small-Scale Use (18 Reviews)

  • Average Rating: 4.4/5
  • Most Praised Features:
  • OLED display readability (89% mentioned)
  • Easy WiFi setup (82% mentioned)
  • Cost-effective Base Model (77% mentioned)

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