Tzone TZ-WF503L Wi-Fi Ultra-Low Temperature Data Logger with PT100 Probe (-200°C to +200°C)

The Tzone TZ-WF503L is a Wi-Fi temperature data logger with a high-precision PT100 probe that measures from -200°C to +200°C. It uploads readings to the cloud in real time, so you can monitor ultra-low freezers, dry ice and cryogenic storage from any browser or phone. No gateway is needed.

Key Features

• -200°C to +200°C range: PT100 probe for ultra-low and cryogenic temperatures.
• High-precision PT100 sensor: Accuracy ±(0.15 + 0.002·|t|) °C, with fast response and strong anti-interference.
• Real-time Wi-Fi upload: 2.4 GHz / 5 GHz, 802.11 b/g/n. Cloud storage is unlimited.
• NFC setup: Tap your phone to read and change settings with the "Real-time Data Logger" NFC app.
• 18,368 records on the device: Data is kept locally as well as on the cloud.
• Dual alarms: Cloud platform alerts plus a local buzzer, with user-definable limits.
• LCD display: Shows temperature, alarms, Wi-Fi and battery status.
• Long battery life: Replaceable 3.6 V lithium battery lasts about 2 years at the default 60-minute upload interval.
• Rugged IP65 enclosure: Compact and wall-mountable.

How It Works

1. Press the button to start the logger.
2. Set it up by tapping it with the NFC app on your phone.
3. Place the probe inside the freezer or storage unit and mount the logger outside. It logs temperature and uploads over Wi-Fi.
4. View reports on your mobile or PC.

Installation

The -200°C to +200°C range applies to the probe. Mount the logger body where the ambient temperature stays between -30°C and +60°C, within range of your Wi-Fi network.

Ideal For

Vaccine transport · Ultra-low temperature freezers and dry ice · Pharmaceutical storage · Refrigerated food storage · Container shipments · HACCP, food and catering

Specifications

FAQ

Do I need a gateway?
No. The WF503L connects directly to your Wi-Fi network and uploads to the cloud platform.

Can the whole logger go inside a -80°C freezer?
No. Only the probe goes inside. The logger body must stay between -30°C and +60°C.

What if Wi-Fi goes down?
The logger keeps recording and stores up to 18,368 records on the device.

Is the battery replaceable?
Yes. It uses a replaceable 3.6 V lithium battery that lasts about 2 years at the default upload interval.