1. Product Overview
The INKBIRD Smart Bluetooth Thermometer Hygrometer (Model ITH-21-B) is a versatile device designed to monitor temperature and humidity levels in various indoor environments. Featuring a large LCD display and Bluetooth connectivity, it allows for remote monitoring and data logging via a dedicated smartphone application. This device helps you maintain optimal comfort levels and environmental conditions.
The INKBIRD ITH-21-B device, showing its display, accompanying smartphone app interface, and two AA batteries.
2. Key Features
- Temperature & Humidity Monitoring: Accurate readings for indoor environments.
- Time & Date Display: Conveniently shows current time and date.
- Comfort Level Indicators: Visual cues for 'HOT', 'COLD', 'WET', 'DRY', and 'COMFORT' conditions.
- Bluetooth App Control: Remote monitoring and settings adjustment via the INKBIRD app.
- History Storage & Export: Stores up to 300 days of offline data and allows export of up to 2 years of history from the app.
- 2 Display Modes: Switch between time mode and temperature-humidity mode.
- Large LCD Display: A 3.8-inch screen for clear visibility.
- Long Battery Life: Lasts over 15 months with included 2 AA batteries (2500mAh).
Visual representation of the 6-in-1 features of the device.
3. Setup Guide
3.1 Battery Installation
- Open the back cover of the device.
- Remove the insulating strip from the battery compartment.
- The ITH-21-B will then switch on automatically.
Video demonstrating the initial setup, including battery installation and device activation.
3.2 App Connection
- Download and open the INKBIRD app on your smartphone.
- Click on the "+" icon within the app to search for nearby devices.
- Select "ITH-21-B" from the list of detected devices.
- Follow the on-screen instructions in the app to establish a Bluetooth connection.
Upon successful connection, the device will automatically synchronize time and date with your smartphone.
Connecting the ITH-21-B to the INKBIRD app for remote control and data synchronization.
4. Operating Instructions
4.1 Display Modes
The ITH-21-B offers two display modes:
- Time Mode: Displays current time, date, and basic temperature/humidity.
- Temperature-Humidity Mode: Prominently displays temperature and humidity readings.
Press the 'C/F' button on the device to switch between these two modes.
The two available display modes and the button to switch between them.
4.2 Comfort Level Indicators
The device provides visual comfort level indicators for both temperature and humidity:
- Temperature: 'COLD', 'COMFORT', 'HOT'
- Humidity: 'WET', 'COMFORT', 'DRY'
These indicators help you quickly assess the environment and take appropriate action, such as turning on air conditioning/fan when it's hot, a heater when it's cold, a dehumidifier when it's wet, or a humidifier when it's dry.
Customizable comfort levels for better environmental control.
4.3 Button Functions
- MAX/MIN Button: Press and hold for 5 seconds to clear maximum and minimum recorded temperature and humidity values.
- C/F Button: Press and hold for 5 seconds to change the temperature unit between Celsius (°C) and Fahrenheit (°F).
4.4 Data Logging and Export
The device can save up to 300 days of offline data. Once connected to the app, this data will automatically synchronize. You can view and export up to 2 years of historical data directly from the INKBIRD app.
View and export up to 2 years of historical data from the app.
5. Specifications
| Attribute | Value |
|---|---|
| Brand Name | INKBIRD |
| Model | ITH-21-B |
| Theory | Thermometer Hygrometer |
| Display Type | DIGITAL |
| Display Size | 2.0 - 3.9 Inches (3.8-inch large LCD) |
| Power Type | AA Battery |
| Powered By | 2 AA batteries (2500mAh) |
| Battery Included | Yes |
| Battery Life | About 15 months |
| Bluetooth | BLE 5.0 (70m/230ft open distance) |
| Temperature Range | -20℃~60℃ / -4℉~140℉ |
| Temperature Accuracy | ±0.2℃ (±0.36℉) |
| Humidity Range | 0%RH-99%RH |
| Humidity Accuracy | ±2% (non-condensing) |
| Max Measuring Temperature | 49℃ & Under |
| Style | Standing Station |
| Is Smart Device | Yes |
| Use | Indoor |
| Certification | CE, FCC |
| Origin | Mainland China |
| Package Length | 12 cm |
| Package Width | 3 cm |
| Package Height | 7 cm |
| Package Weight | 0.175 kg |
Device dimensions and battery life information.
Overview of the device's main functions.
The INKBIRD ITH-21-B device, showing its display, accompanying smartphone app interface, and two AA batteries.
Customizable comfort levels for better environmental control.
The two available display modes and the button to switch between them.
View and export up to 2 years of historical data from the app.
Visual representation of the 6-in-1 features of the device.
Bluetooth 5.0 connectivity for enhanced performance.
Device dimensions and battery life information.
6. Wide Range of Applications
The INKBIRD Smart Bluetooth Thermometer Hygrometer is suitable for monitoring environmental conditions in various settings, including but not limited to:
- Wine Cellars
- Incubators
- Baby Rooms
- Classrooms
- Offices
- Greenhouses
Examples of environments where the ITH-21-B can be effectively used.
7. Important Notes
- Ensure the device is within Bluetooth range of your smartphone for app connectivity.
- Replace batteries when the low battery indicator appears on the display.
- Keep the device away from extreme temperatures and high humidity to ensure accurate readings and longevity.