Overview of Inkbird ITC-308

The Inkbird ITC‑308 is a compact digital thermostat featuring a 2.4‑inch LCD, dual‑mode temperature control, and a 200‑point memory. It supports K‑type thermocouples, ±0.5°C accuracy, and programmable heating/cooling cycles for precise homebrew or lab use. Ideal for hobbyists. and control now!

The Inkbird ITC‑308 is a versatile digital thermostat designed for precise temperature control in brewing, fermentation, and laboratory settings. It measures 4.7 × 4.2 × 1.8 inches (120 × 107 × 46 mm) and weighs 0.7 lb (320 g). The unit operates on 5 V DC via a standard USB‑C or barrel connector, drawing less than 1 A. Its 2.4‑inch LCD displays temperature, setpoint, mode, and alarm status, and can be dimmed or turned off for power saving. The ITC‑308 supports K‑type thermocouples with a ±0.5 °C accuracy over a range of –200 °C to +500 °C, and can be calibrated in 0.1 °C increments. It offers two control modes: heating and cooling, each with a 5‑point PID loop that can be tuned via the menu. The device stores up to 200 setpoints in non‑volatile memory, allowing for complex temperature profiles. Built‑in alarms trigger when the temperature deviates more than ±5 °C from the setpoint, and a buzzer alerts the user. The thermostat is powered by a 5 V supply, but can also run on a 12 V adapter with a built‑in voltage regulator. The enclosure is made of ABS plastic, rated for indoor use, and the device is IP20 compliant. The ITC‑308 includes a 10‑year warranty and supports firmware updates via USB or SD card, ensuring long‑term reliability and feature enhancements.

• Compact 4.7×4.2×1.8 in. form factor.
• USB‑C or barrel power input.
• IP20 rating for safe indoor use.

Ideal for hobbyists and pros alike.!!!!

Physical Setup

Unbox the ITC‑308, attach the K‑type probe, and connect the 5‑V USB‑C cable. Mount the unit on a stable surface using the provided screws. Wire the thermocouple leads to the labeled terminals, ensuring correct polarity. Power on to initialize the LCD display. Refer to manual wiring diagrams.!!

Setup, Power, Mounting, and Wiring (Unboxing, Power Connection, Mounting & Thermocouple Wiring)

Begin by opening the sealed box, which contains the ITC‑308 unit, a 5‑V USB‑C cable, a K‑type probe, mounting screws, and a quick‑start guide. Carefully detach the probe from its protective sleeve and inspect the 4‑wire cable for any visible damage. The probe’s colored wires correspond to the terminal labels on the device: red for +, black for – (or blue for – depending on the model). Connect the probe to the designated terminals, ensuring the correct polarity to avoid erroneous temperature readings.

Next, connect the USB‑C cable to the ITC‑308’s power input. The device accepts 5‑V DC, and the cable’s other end plugs into a USB port or a regulated power supply. Verify that the LED indicator turns on, confirming power delivery. The LCD screen should display the default “Welcome” screen, indicating successful initialization.

For mounting, choose a flat, heat‑resistant surface such as a metal rack or a dedicated mounting board. Use the supplied screws and a screwdriver to secure the unit. Avoid placing the device near high‑voltage lines or in damp environments, as this can affect performance. Ensure the probe’s cable is routed away from moving parts or hot surfaces to maintain accurate readings.

After mounting, perform a quick calibration check by placing the probe in a known temperature environment (e.g., ice water at 0 °C). Adjust the offset via the menu if the display shows a deviation. Once satisfied, lock the settings to prevent accidental changes during operation. The ITC‑308 is now ready for use in your brewing or laboratory setup.

Additional safety steps include verifying that the USB‑C cable is not frayed and that the probe connector is snugly seated. If the device is used in a high‑humidity area, consider applying a silicone sealant around the mounting holes to prevent moisture ingress. Finally, label the probe cable with a heat‑resistant marker to aid future maintenance and avoid confusion during multi‑probe setups.

When connecting the probe, use a gentle twist to secure the connector; a loose fit can introduce noise. If you plan to use the ITC‑308 in a temperature‑cycling application, route the probe cable through a conduit to shield it from electromagnetic interference. Additionally, keep a spare probe on hand for rapid replacement, as wear on the tip can degrade accuracy over time.

After all connections, double‑check that the device’s firmware version matches the latest release, as updates can improve stability and add new features. Thanks!

Operating the Thermostat

Press the power button to start. Use the +/- keys to set target temperature. The LCD shows current and set points. Press the mode button to toggle heating/cooling. Confirm settings by pressing OK. The thermostat will maintain the set temperature automatically. Set speed via menu for airflow!!

Temperature Control (Setting Targets & LCD Display)

To begin, press the power button until the LCD lights up. The screen will display the current temperature in Celsius or Fahrenheit, depending on your selection. Use the ‘+’ and ‘–’ buttons to adjust the target temperature. Each press changes the set point by 0.5 °C (or 1 °F). When you reach the desired value, press the ‘OK’ button to lock the target. The LCD will then show the target temperature in a larger font, with the current temperature updating in real time. If the unit is set to heating mode, the display will indicate “Heat” and the thermostat will activate the heating element once the current temperature falls below the target. In cooling mode, the display will show “Cool” and the device will trigger the cooling fan or refrigeration cycle when the temperature rises above the set point. The thermostat automatically switches between heating and cooling based on the mode you select. To change modes, press the ‘Mode’ button until the screen cycles through “Heat,” “Cool,” and “Auto.” In Auto mode, the unit will decide whether to heat or cool to maintain the target temperature. The LCD also shows the temperature tolerance, which is the acceptable range around the set point before the thermostat turns on or off. You can adjust this tolerance by pressing the ‘Toler’ button and using the +/- keys, then confirming with ‘OK.’ The display updates instantly to reflect your changes. For quick reference, the LCD’s top row shows the target temperature, while the bottom row displays the current temperature and the mode indicator. This layout allows you to monitor the system’s performance at a glance. If you need to reset the thermostat to factory settings, press and hold the ‘Reset’ button for three seconds; the LCD will flash “Reset” and revert all parameters to default values. Always ensure the thermostat is powered by a stable 12 V DC supply, and verify the thermocouple is properly connected to the designated input. A correctly wired thermocouple ensures accurate temperature readings and reliable operation. By following these steps, you can efficiently set and maintain your desired temperature using the Inkbird ITC‑308’s intuitive interface. The device also supports a 5‑minute timer that can be set via the ‘Timer’ button, allowing you to schedule temperature changes automatically. This feature is especially useful for batch brewing or time‑controlled experiments. Additionally, the ITC‑308 logs temperature data internally, which can be accessed by connecting the unit to a computer via the USB port and using the provided software. The log records timestamps and temperature readings, providing a detailed history for analysis. Users can export this data as a CSV file for further processing. The thermostat’s compact size and low power consumption make it suitable for portable setups or integration into larger control systems. By mastering these functions, you can fully leverage the ITC‑308’s capabilities for precise temperature management.

Advanced Configuration

The ITC‑308 offers settings for temperature tolerance, alarm thresholds, and fan speed. Use the ‘Toler’ button to set ±0.5 °C tolerance, ‘Alarm’ to define high/low limits, and ‘Fan’ to adjust cooling fan duty. Press ‘OK’!! to save each change. Reset to defaults by holding ‘Reset’ for 3 s!!!

Advanced Settings (Temperature Tolerance & Alarm Parameters)

The Inkbird ITC‑308 allows fine‑tuning of temperature tolerance and setting of alarm thresholds. Press the Toler button to view the current tolerance, then adjust with + and – keys to ±0.5 °C. This tolerance limits how much the measured temperature may deviate from the target before the controller initiates a heating or cooling cycle, ensuring consistent process control.

Alarm parameters are configured by selecting the Alarm button. The LCD will show two values: the high alarm and the low alarm. Use the + and – keys to set the high alarm above the target temperature and the low alarm below it. When either threshold is reached, the controller will flash the LCD and emit a buzzer, alerting the user to a temperature excursion.

Both tolerance and alarm settings are stored in the device’s non‑volatile memory, so they persist after power cycling. To reset the controller to factory defaults, press and hold the Reset button for three seconds; the LCD will display Reset and then revert all parameters to their original values. For troubleshooting, consult the user manual’s troubleshooting section for common issues such as “No response” or “Temperature drift.” The ITC‑308’s firmware can be updated via a USB connection, allowing users to benefit from performance improvements and bug fixes that enhance reliability and extend the unit’s lifespan. See manual

Wi‑Fi Capabilities (ITC‑308‑WIFI)

The ITC‑308‑WIFI model adds wireless control via the Inkbird app. Pair the unit to your Wi‑Fi network, monitor temperature, set targets, and receive alarm alerts on your phone. Firmware updates are delivered OTA, keeping the thermostat current without manual steps. Settings sync automatically now.

Wi‑Fi and Remote Control (Pairing with Inkbird App & Remote Monitoring)

To pair the ITC‑308‑WIFI with the Inkbird app, first ensure the thermostat’s Wi‑Fi module is powered and the device is in pairing mode (press and hold the power button until the LED blinks). Open the free Inkbird app on iOS or Android, tap “Add Device,” and select the ITC‑308‑WIFI from the list. The app will prompt you to enter your home Wi‑Fi SSID and password; once entered, the thermostat will connect and display the current temperature on the screen. After successful pairing, you can view real‑time data, adjust setpoints, and configure alarm thresholds directly from the app. The remote monitoring feature allows you to receive push notifications when the temperature deviates from the set range, and you can even schedule heating or cooling cycles. The app’s dashboard provides historical graphs, export options, and a “Remote Control” toggle that sends instant commands to the thermostat. Firmware updates are delivered over the air; the app will notify you when a new version is available, and you can even “Update” it without disconnecting the device. All settings sync automatically, ensuring consistency between the physical unit and the mobile interface. If you encounter connectivity issues, verify that the Wi‑Fi network is 2.4 GHz only, as the ITC‑308‑WIFI does not support 5 GHz bands. Restart the router, clear the device’s Wi‑Fi history via the “Reset” button, and re‑pair. The device’s serial port allows firmware flashing with the Inkbird CLI tool, offering yond the app’s GUI. OK.

Maintenance & Firmware

Keep the unit clean, update firmware via USB or Wi‑Fi, and reset with the reset button if it freezes. Use the Inkbird app to download the latest firmware. The 2‑year warranty covers normal use and defects. Firmware updates are OTA,5‑second reset restores defaults.

Maintenance, Firmware, and Warranty (Common Issues, Fixes, Firmware Updates, Warranty Info)

Inkbird ITC‑308 users often encounter a blank LCD after a power cycle; this is usually caused by a loose power connector or a depleted battery in the optional 5‑V adapter. Re‑solder the connector or replace the battery, and the display will return to life. Verify that the K‑type probe is properly seated, and that the probe cable is intact. and check probe temp. ok If the probe is fine, reset the unit by holding the reset button for 5 seconds; this clears any corrupted memory and restores factory defaults.

Firmware updates are delivered via USB or the Inkbird app. Connect the ITC‑308 to a computer with a USB cable, download the latest firmware from the official website, and follow the on‑screen prompts. For Wi‑Fi models, open the app, navigate to “Firmware Update,” and allow the device to download the patch over the air. Always keep the device powered during the update to avoid corruption.

Warranty coverage lasts two years from the date of purchase and includes repair or replacement for manufacturing defects. Shipping costs for return shipping are the responsibility of the buyer unless the defect is proven to be a manufacturing fault. To claim warranty, email the purchase receipt and a description of the issue to support@inkbird.com. The company typically resolves claims within 7–10 business days. For extended support, consider the optional 3‑year protection plan available at purchase!!!

Calibration

To calibrate the ITC‑308, connect a calibrated K‑type probe to the probe port. Power on the unit, press the “CAL” button, and follow the on‑screen prompts to set the reference temperature. Verify accuracy by comparing the displayed value with a known standard. Repeat as needed

Calibration Procedure (Steps & Accuracy Checks)

Step 1: Prepare a calibrated reference thermometer (±0.1 °C). Place it in the same environment as the ITC‑308 probe.

Step 2: Connect the K‑type thermocouple to the probe port. Ensure the connector is seated firmly.

Step 3: Power on the ITC‑308. The LCD will display “CALIBRATE” after a few seconds.

Step 4: Press the “CAL” button. A prompt will ask for the reference temperature.

Step 5: Enter the reference temperature using the arrow keys and confirm with “OK”. The unit will adjust its internal offset.

Step 6: Verify the display. It should match the reference thermometer within ±0.5 °C. If not, repeat steps 4‑5.

Step 7: Test at multiple points (e.g., 0 °C, 50 °C, 100 °C). Record the differences.

Step 8: If discrepancies exceed ±0.5 °C, adjust the “Offset” setting in the advanced menu.

Step 9: Save the calibration. The unit will retain the offset until the next power cycle.

Step 10: Document the calibration date, reference thermometer serial, and results in a log for future reference.

Confirm offset stability for 30 minutes before finalizing quickly!!!

During calibration, keep the probe in a stable temperature zone free from drafts or direct sunlight. Use a calibrated reference thermometer to verify the probe reading. Record the raw and adjusted values for future reference. If the unit shows inconsistent readings, inspect the thermocouple for damage or loose connections; Replace if necessary and ground!

Safety

Ensure the unit is powered from a grounded outlet. Keep the probe away from direct flame or high‑temperature surfaces. Inspect wiring for damage before use. Do not modify firmware without updates. Follow manufacturer instructions for disposal. Handle with care! Check heat.5°C.

Safety Precautions (Electrical Safety, Handling, and Environmental Guidelines)

Before operating the Inkbird ITC‑308, verify that the power supply matches the device’s 12‑V DC requirement and is connected to a properly grounded outlet. Use only the supplied power cord; do not improvise extensions or adapters that could cause voltage drops or overheating. Inspect the cord and plug for fraying or exposed conductors; replace any damaged components immediately. When mounting the thermostat, select a stable, dry surface that is free from direct sunlight, moisture, or corrosive gases. Secure the unit with the provided screws or mounting brackets, ensuring that the display and probe are not under tension or strain. Handle the thermocouple probe with care; avoid bending beyond the specified radius to prevent breakage. Keep the probe tip clean and free of condensation or chemical residues, as these can alter temperature readings. The ITC‑308 is rated for indoor use only; do not expose it to high humidity, steam, or submersion. For environments with temperatures below 0 °C, use a probe rated for low‑temperature operation to maintain accuracy. When cleaning, use a s Do not disassemble the unit or attempt to repair internal components, as this may void the warranty and pose electrical hazards. Firmware updates recommended via USB interface; not install firmware! Adhering to these precautions ensures reliable operation, protects users from electric shock, and extends the lifespan of the ITC‑308.