Temperature Humidity Datalogger A57 BT, UNIT

The A57 BT Temperature Humidity Datalogger is a Bluetooth-enabled temperature and humidity data logger designed for environmental monitoring, recording, and analysis. The device uses low-power microprocessors, includes an internal temperature sensor, and can measure temperature and humidity by connecting an external temperature probe or an external temperature-humidity sensor.

This model is intended for applications where accurate climate tracking and historical data logging are essential, such as food processing, cold-chain transportation, warehousing, logistics, and other controlled environments.

✨ Key features

• Wide temperature range: -40 °C to +85 °C
• Supports multiple sensor types
• Connection to mobile app and PC analysis software
• Data export capability
• Long working time: up to 2 years
• Audible and visible alarm
• IP54 protection rating
• Memory for up to 64,000 records
• Magnetic and wall-mounted design
• Unit switching: °C / °F
• MAX / MIN / AVG functions
• Backlight and LED indication
• Low battery indication

📊 Technical specifications

External temperature and humidity sensor

Temperature: - Range: -40 °C to +85 °C (-40 °F to +185 °F)

Humidity: - Range: 0 % to 100 % RH

Temperature accuracy: - 0 °C to +60 °C: ±0.3 °C - -40 °C to 0 °C: ±0.5 °C - +60 °C to +85 °C: ±0.5 °C - 32 °F to 140 °F: ±0.6 °F - -40 °F to 32 °F: ±0.9 °F - 140 °F to 185 °F: ±0.9 °F

Humidity accuracy: - 0 % to 90 % RH: ±2.5 % RH (at 25 °C) - 90 % to 100 % RH: ±3.5 % RH (at 25 °C)

Internal NTC temperature sensor

• Range: -40 °C to +85 °C (-40 °F to +185 °F)

Accuracy: - 0 °C to +60 °C: ±0.4 °C - -40 °C to 0 °C: ±1.0 °C - +60 °C to +85 °C: ±1.0 °C - 32 °F to 140 °F: ±0.8 °F - -40 °F to 32 °F: ±2.0 °F - 140 °F to 185 °F: ±2.0 °F

External NTC temperature sensor

• Range: -40 °C to +85 °C (-40 °F to +185 °F)

Accuracy: - -20 °C to +40 °C: ±0.5 °C - -40 °C to -20 °C: ±1.0 °C - +40 °C to +85 °C: ±1.0 °C - -4 °F to 104 °F: ±0.9 °F - -40 °F to -4 °F: ±2.0 °F - 104 °F to 185 °F: ±2.0 °F

General technical data

• Resolution: 0.1 °C (0.1 °F) / 0.1 % RH
• Record capacity: 64,000 sets
• Recording interval: 10 s to 24 h (set via PC / app)
• Start-up modes: buttons / software / scheduled booking
• Screen-off time: 15 s ±2 s (set via PC / app)
• USB port: USB Type-C
• USB power supply: yes
• Working time: up to 2 years
• Working temperature and humidity: -40 °C to +85 °C, ≤99 % RH
• Storage temperature: -40 °C to +85 °C (without battery)
• Protection rating: IP54
• Mounting method: rear magnet or wall mounting

🔋 Power supply

• Battery type: single-use Li-SOCl2 battery, 3.6 V, 2700 mAh (ER14505)

📐 Dimensions and weight

• Dimensions: 104 × 62 × 25 mm
• Weight: about 110 g (battery included)

📦 Standard accessories

• Gift box
• Quick start guide
• Safety instruction
• Downloadable operation guide
• Battery
• Wall-mount screws ×2
• Expandable rubber plugs ×2
• USB cable
• External temperature and humidity sensor

🏭 Typical applications

• Food processing
• Cold-chain transportation
• Warehousing and logistics
• Environmental recording and quality control

✅ Certifications

• CE
• RoHS

🌐 Connectivity and software

The device supports operation with a Bluetooth mobile app and PC analysis software, allowing users to view, analyze, and export recorded data. ```