Descrizione
You Cannot Manage What You Cannot Measure. Temperature and Humidity Are the Silent Variables.
In wine cellars, cigar humidors, guitar storage rooms, mushroom grow tents, and server closets, the difference between thriving and catastrophic loss is often 3 degrees and 10% relative humidity — invisible to human senses, invisible until it is too late. The INKBIRD ITH-21-B is a Bluetooth-enabled digital sentinel that watches these variables continuously, logs them to your phone, and alerts you the moment conditions drift outside your defined safe zone. It is not a thermometer. It is an environmental insurance policy that costs less than a single bottle of the wine it protects.
The Swiss-made Sensirion sensor at its core delivers ±0.3°C temperature accuracy and ±3% RH humidity precision — laboratory-grade performance in a consumer-priced device. The e-ink display reads clearly from across a room without backlight glare, and its 1-year battery life on a single CR2477 cell means you set it and forget it. The INKBIRD app connects via Bluetooth 5.0, graphing 20 days of historical data so you can correlate temperature swings with time of day, HVAC cycling, or seasonal shifts. For anyone managing a temperature-sensitive environment — a reptile terrarium, a cheese aging cave, a photographic film archive — this is the difference between guesswork and governance.
The best monitoring system is the one you never have to think about — until it saves you.
Key Features
- ✦ Swiss-Made Sensirion Sensor: Industry-leading accuracy — ±0.3°C for temperature, ±3% for relative humidity. The same sensor technology used in pharmaceutical cold-chain monitoring.
- ✦ Bluetooth 5.0 Connectivity: Pairs with the INKBIRD app (iOS/Android) for real-time monitoring, historical graphing, and custom alert thresholds. Range: up to 100m line-of-sight, 30m through typical walls.
- ✦ 20-Day Data Logging: Onboard memory stores temperature and humidity readings every minute for 20 days. Export CSV data from the app for analysis in Excel or Google Sheets.
- ✦ Customizable Alerts: Set high/low thresholds for both temperature and humidity. The app pushes a notification to your phone when conditions breach your defined range.
- ✦ E-Ink Display: High-contrast, wide-angle readable screen with no backlight — visible in bright sunlight and dark rooms alike. Displays temperature, humidity, battery level, and Bluetooth status at a glance.
- ✦ 1-Year Battery Life: Powered by a single CR2477 coin cell (included). No charging cables, no frequent battery swaps.
- ✦ Multi-Device Support: The INKBIRD app can monitor multiple ITH-21-B sensors simultaneously — ideal for multi-room or multi-zone environments.
Technical Specifications
- Model: INKBIRD ITH-21-B
- Sensor Type: Swiss-made Sensirion digital temperature and humidity sensor
- Temperature Range: -20°C to 60°C (-4°F to 140°F)
- Temperature Accuracy: ±0.3°C (typical)
- Humidity Range: 0% to 99% RH
- Humidity Accuracy: ±3% RH (typical, 20-80% RH range)
- Connectivity: Bluetooth 5.0 (BLE)
- Display: E-ink / segmented LCD, always-on
- Battery: CR2477 3V lithium coin cell (included), ~1 year typical life
- App Compatibility: INKBIRD app for iOS 11.0+ and Android 5.0+
Application Scenarios
The INKBIRD ITH-21-B serves a surprisingly broad range of use cases that share one common thread: environmental conditions that matter but are easy to overlook. Wine collectors monitor cellar temperature and humidity to prevent cork drying and label degradation. Cigar aficionados maintain 65-72% RH in their humidors — the zone where wrappers stay supple and burn evenly. Mushroom cultivators track the delicate balance of temperature and humidity that triggers pinning and fruiting. Guitar owners protect solid-wood instruments from the cracking and warping that occurs when humidity drops below 40% in heated winter homes. Server room operators verify that cooling systems maintain the 18-27°C range that prevents thermal throttling. And in reptile habitats, the difference between a healthy animal and a veterinary emergency can be 5 degrees — the ITH-21-B's alert threshold catches it before you do.
Frequently Asked Questions
Q: Do I need the app to use this device?
No. The ITH-21-B displays current temperature and humidity on its built-in e-ink screen without any app or phone connection. The app adds Bluetooth data logging, historical graphs, and custom alert notifications — but the device functions as a standalone thermometer/hygrometer out of the box.
Q: How far does the Bluetooth range reach?
In open air, up to 100 meters (328 feet). Through typical residential walls (drywall + wood studs), expect 20-30 meters. Through concrete or brick walls, range drops to 10-15 meters. The app stores data locally during disconnection and syncs the full history when you come back into range.
Q: Can I use multiple sensors in different rooms?
Yes. The INKBIRD app supports multiple ITH-21-B sensors simultaneously. You can name each sensor by location ("Wine Cellar," "Guitar Room," "Garage") and set independent alert thresholds for each one.
Q: Is the sensor accuracy good enough for a cigar humidor?
At ±3% RH accuracy, the ITH-21-B is suitable for cigar humidor monitoring. The ideal humidor range is 65-72% RH — with ±3% accuracy, your readings are within a 6% window, which is sufficient to catch a drying trend. For laboratory or museum-grade applications requiring ±1% accuracy, a calibrated data logger is recommended.
Q: How do I export the data for analysis?
Open the INKBIRD app, navigate to the device's data history page, and tap the export icon. Data exports as a CSV file with timestamp, temperature, and humidity columns — ready for import into Excel, Google Sheets, or any data analysis tool. The onboard memory holds 20 days of minute-by-minute readings.
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