Tzone TZ-WF503B Wi-Fi Temperature & Humidity Data Logger with External Probe

The Tzone TZ-WF503B is a Wi-Fi temperature and humidity data logger with an external SHT30 probe. It uploads readings to the cloud in real time, so you can monitor cold rooms, freezers and shipments from any browser or phone. No gateway is needed.

Key Features

• External SHT30 probe: Measures temperature and humidity from -40°C to +125°C, with fast response and strong anti-interference.
• High accuracy: ±0.3°C (0–60°C) and ±2% RH (10–90% RH).
• 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 an onboard buzzer, with user-definable temperature and humidity limits.
• LCD display: Shows temperature, humidity, 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 cold room, freezer or container and mount the logger outside. It logs temperature and humidity and uploads over Wi-Fi.
4. View reports on your mobile or PC.

Installation

The -40°C to +125°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 · Blood transport · Pharmaceutical storage · Refrigerated food storage · Container shipments · HACCP, food and catering

Specifications

FAQ

Do I need a gateway?
No. The WF503B connects directly to your Wi-Fi network and uploads to the cloud platform.

Can the logger go inside a freezer?
Place the probe inside. The logger body is rated for -30°C to +60°C, so mount it outside very cold freezers.

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.