1. Introduction
The HABOTEST HT73 is a professional portable wood moisture meter designed for high-precision measurement of moisture content in various materials. It integrates advanced sensing technology, multi-material compatibility, and intelligent humidity alerts to provide accurate and reliable readings. This instrument is an essential tool for professionals in woodworking, construction, renovation, and furniture manufacturing, as well as for general home maintenance.
Equipped with a robust stainless steel probe and pre-calibrated parameters for seven different material types, the HT73 allows for rapid and efficient moisture detection. Its user-friendly interface features a dual display with a three-color backlit LCD and an analog bar graph, ensuring clear and intuitive interpretation of moisture levels.
2. Product Overview & Features
The HABOTEST HT73 offers a range of features designed for ease of use and accuracy:
- High-Precision Sensor: Ensures accurate moisture content readings.
- Embedded Probe: Durable stainless steel probes for effective penetration.
- 7 Built-in Material Properties: Pre-calibrated settings for various wood types and building materials.
- Data Hold Function: Allows users to lock the current reading on the display.
- Max Measurement Lock: Automatically captures and retains the highest moisture reading during a measurement session.
- Tri-Color Backlight Display: Provides an intuitive visual indication of moisture levels (Green for low, Orange for moderate, Red for high).
- Low Voltage Alarm: Alerts the user when batteries are running low.
- Auto Shutdown: Conserves battery life by automatically powering off after 10 minutes of inactivity.
- Compact & Lightweight Design: Easy to carry and handle for on-site measurements.
- Replaceable Probes: Comes with spare probes and a wrench for easy maintenance and extended product lifespan.
3. Technical Specifications
| Function | Range / Description | Accuracy |
|---|---|---|
| Measurement Range | 0.0–99.9%RH | ±2.0% |
| Sensor | High-Precision Temperature and Humidity Sensor | |
| Probe | Stainless Steel Construction | |
| Display | Tri-Color Backlit Digital Display | |
| Alarm Method | Red backlight: High moisture content Orange backlight: Moderate moisture content Green backlight: Low moisture content | |
| Data Hold | Press and release the HOLD button during measurement to lock the reading. | |
| Low Voltage Alert | Yes | |
| Auto Power Off | The meter will automatically power off if no operation is performed within 10 minutes after startup. | |
| Operating Environment | -10 ~ 50°C / 20 ~ 90%RH | |
| Storage Environment | -10 ~ 60°C / 20 ~ 90%RH | |
| Product Dimensions | 124 × 51 × 29 mm | |
| Product Weight | Approx. 81 g (without batteries) | |
| Power Supply | 2 × 1.5V AAA batteries (not included in product packaging) |
Built-in Material Parameters (Examples)
- Material 1: Beech, Spruce, Larch, Birch, Cherry, Walnut (8.8–54.8%)
- Material 2: Oak, Pine, Maple, Ash, Douglas Fir, Eucalyptus (6.8–47.9%)
- Material 3: Cement mortar layer, Concrete (0.9–22.1%)
- Material 4: Anhydrous gypsum mortar layer (0.0–11.0%)
- Material 5: Cement mortar (0.7–8.6%)
- Material 6: Lime mortar, Gypsum (0.6–9.9%)
- Material 7: Bricks (0.0–16.5%)
4. Package Contents
Upon opening your HABOTEST HT73 package, please verify that all the following items are included:
- HT73 Main Unit x1
- Probe Protective Cap x1
- Spare Probes x2
- Wrench x1
- English Instruction Manual x1
- Carrying Case x1
Note: 2 x 1.5V AAA batteries are NOT included in the package and must be purchased separately.
5. Setup
5.1 Battery Installation
- Locate the battery compartment on the back of the HT73 meter.
- Slide open the battery compartment cover.
- Insert two (2) 1.5V AAA batteries, ensuring correct polarity (+/-).
- Close the battery compartment cover securely.
5.2 Probe Installation/Replacement
The HT73 comes with pre-installed probes. If replacement is needed:
- Carefully remove the probe protective cap.
- Use the included small wrench to loosen the nuts securing the probes.
- Remove the old probes.
- Insert the new spare probes into the designated slots.
- Tighten the nuts with the wrench to secure the new probes.
- Replace the probe protective cap when not in use to prevent damage and ensure safety.
6. Operating Instructions
6.1 Power On/Off
- Power On: Press the Power Button (red button with power symbol) to turn on the device. The display will light up.
- Power Off: Press and hold the Power Button for a few seconds to turn off the device. The meter will also automatically power off after 10 minutes of inactivity to save battery.
6.2 Selecting Material Type
The HT73 has 7 built-in material categories. To select the appropriate category for your measurement:
- Press the Measurement Materials Category Selection Key (button labeled 'M') to cycle through the 7 material types (M1 to M7).
- Refer to the 'Built-in Material Parameters' section (Table 3.1 and Figure 3.2) to identify the correct category for the material you are testing.
6.3 Taking a Measurement
- Ensure the meter is powered on and the correct material category is selected.
- Remove the probe protective cap.
- Carefully insert the Test Probes into the material you wish to measure. Ensure both probes penetrate the surface adequately for good contact.
- Read the moisture content directly from the digital display. The analog bar graph will also provide a visual representation.
- Observe the backlight color: Green indicates low moisture, Orange indicates moderate moisture, and Red indicates high moisture.
- After measurement, remove the probes and replace the protective cap.
6.4 Data Hold Function
To lock the current reading on the display:
- While taking a measurement, press the MAX/HOLD Button (button labeled 'MAX HOLD'). The reading will be frozen on the screen.
- Press the MAX/HOLD Button again to release the hold and resume live measurement.
6.5 MAX Measurement Function
To view the maximum reading recorded during a measurement session:
- Press and hold the MAX/HOLD Button during measurement. The meter will automatically capture and display the highest moisture value detected.
- Release the button to return to the current measurement.
7. Maintenance
7.1 Cleaning
- Wipe the meter's body with a soft, dry cloth. Do not use abrasive cleaners or solvents.
- Ensure the probes are clean and free of debris after each use to maintain accuracy.
7.2 Storage
- Always replace the probe protective cap when the meter is not in use to prevent damage to the probes and accidental injury.
- If storing the meter for an extended period, remove the batteries to prevent leakage and damage to the device.
- Store the meter in a cool, dry place within the specified storage environment (-10 ~ 60°C / 20 ~ 90%RH).
8. Troubleshooting
- No Display / Meter Not Turning On: Check if batteries are installed correctly and have sufficient charge. Replace batteries if necessary.
- Inaccurate Readings:
- Ensure the correct material category (M1-M7) is selected for the material being tested.
- Verify that the probes are making good contact with the material.
- Clean the probes if they appear dirty or corroded.
- Ensure the probes are fully inserted into the material.
- Low Voltage Alert: The meter will indicate low battery. Replace the two 1.5V AAA batteries promptly to ensure accurate operation.
- Meter Shuts Off Unexpectedly: If not due to the 10-minute auto-shutdown, check battery levels.
9. User Tips
- For best results, take multiple readings in different spots on the material and average them.
- Always ensure the probes are clean before and after use to prevent contamination and maintain accuracy.
- When measuring wood, try to insert the probes along the grain for more consistent readings.
- Be aware that surface moisture can affect readings; ensure the material surface is dry before testing.
- The protective cap is crucial for probe longevity and user safety; always use it when the meter is not in active use.
10. Warranty & Support
For warranty information, technical support, or service inquiries, please refer to the contact information provided by your retailer or the official HABOTEST website. Keep your purchase receipt as proof of purchase for any warranty claims.
