Elitech BT-3S Dual Channel Temperature Data Logger ±0.9℉ Accuracy, 4" Large LCD Display, Refrigerator Thermometer with External Probe for Liquid, Max/Min Recording, Wall Mount & Stand for Food Fridge Kitchen Lab

The Elitech BT-3S is a dual-channel temperature data logger with ±0.9°F accuracy, featuring an internal sensor and a waterproof external probe for simultaneous monitoring of air and liquid temperatures. Its 4-inch large LCD displays real-time readings, max/min records, and humidity at a glance, with one-touch recall to track temperature fluctuations. Designed for both fridges and labs, it offers flexible wall-mount or stand placement, making it ideal for food storage, water baths, and reagent monitoring.

Lab-Grade Dual Sensor Precision
Internal temp/humidity sensor plus external probe for dual-channel synchronous monitoring. Accuracy up to ±0.9℉（±0.5℃）, humidity range 10%–99%RH. Captures every fluctuation in food fridges and lab environments with precision you can trust.

4-Inch Large Display, Readable from Across the Room
4-inch oversized LCD shows temperature, humidity, time, and comfort level at a glance. Large, bold digits mean you can read it from across the kitchen or lab — no need to walk over just to check the reading.

One-Touch Max/Min Recall — Know Your Fridge's Every Fluctuation
Press a button to review historical max/min temperatures; one more press to reset. See exactly how much the temperature swings when the fridge door opens or the compressor cycles — essential for safe food storage.

Waterproof External Probe — Dips Directly into Liquids
The probe can be immersed directly into liquids for accurate readings across -40℉ to +212℉. Perfect for fridge interiors, water baths, liquid media, and reagent storage. The main unit stays outside while the probe reaches the target — synchronized dual-point monitoring.

Wall Mount + Stand — Flexible Mounting for Fridges & Labs
Keyhole slots for hanging on fridge doors or lab walls, plus a foldable kickstand for countertop or shelf use. Compact, tool-free setup — works just as well in your home kitchen as it does in a professional lab.

Specifications

Internal Temperature Range: 0-50℃; 32°F - 122°F
Internal Temperature Accuracy: ±0.5°C; ±0.9°F
External Temperature Range: -40-100°C; -40°F - 212°F
External Temperature Accuracy: ±1°C (0-60°C); ±2°C (60-100°C); ±3°C (-40°C - -20°C); ±2°C (-20°C - 0°C); 
±1.8°F (32°F-140°F); ±3.6°F (140°F-212°F); ±5.4°F (-40°F - -4°F); ±3.6°F (-4°F-32°F)
Temperature Resolution: 0.1°C
Humidity Range: 0-99% RH
Humidity Accuracy: ±5%RH (10%RH—90%RH)
Humidity Resolution: 1% RH
Power Supply: 2*AAA(7#)
Operating Environment: Temperature: 0-50°C (32°F-122°F); humidity <75% RH
Storage Environment: Temperature: -10-60°C (14°F-140°F); humidity <80% RH (Batteries should be removed)
Certifications: CE and UKCA certification

📚User Manual & Certification

Elitech BT-3S Dual Channel Temperature Data Logger User Manual

CE Certificate — Elitech BT-3S Dual Channel Temperature Data Logger

UKCA-EMC Certificate — Elitech BT-3S Dual Channel Temperature Data Logger