1. Product Overview
The CERTEON LDS-1G Grain Moisture Meter is a portable digital instrument designed for rapid and accurate determination of moisture content in grains and other granular non-metal materials. This device integrates moisture measurement, bulk density estimation, temperature detection, and weight indication into a single unit. It is suitable for use in agricultural production, grain storage management, food processing, and commodity trading.


2. Key Features
- Supports 24 Grain Types: Compatible with a wide variety of grains and granular non-metal materials, offering excellent versatility.
- Fast and Accurate Measurement: Equipped with an upgraded intelligent sensor that delivers quick response and highly accurate results.
- All-in-One Multifunction Design: Simultaneously measures moisture content, bulk density, temperature, and weight, improving efficiency and convenience.
- Backlit LCD Display: Provides a clear and easy-to-read interface, even in low-light or outdoor environments.
- Easy Operation: Designed with a simple keypad interface, allowing users to operate the device quickly with minimal training.
- Flexible Power Options: Can be powered by 4 AA batteries for portability or connected to an external 9V DC source for continuous use.
- Automatic Temperature Compensation: Ensures consistent and reliable measurement results under varying environmental conditions.

3. Specifications
| Parameter | Specification |
|---|---|
| Measuring Range | 3% – 35% |
| Measurement Time | ≤10 seconds |
| Measurement Error | ≤ ±0.5% (Repeatability ≤ 0.2%) |
| Temperature Compensation | Built-in thermistor, automatic correction |
| Power Supply | 4 × AA batteries or external 9V DC |
| Display | High-brightness backlit LCD |
| Functions | Moisture, Weight, Temperature, Average Value |
| Net Weight | 830g |
| Supported Grain Types | 24 selectable grain varieties (Paddy Rice, Soybean, Wheat (Soft), Rapeseed Meal, Corn, Barley, Rough Rice, Milled Rice, Large Kernel Corn, Wheat, Shelled Peanut, Sorghum, Black Sesame, Sunflower Seed Cake, Watermelon Seed Cake, Cottonseed, Cottonseed Meal, Rapeseed Cake, Pelleted Feed, plus 4 user-customizable settings P21-P24) |



4. Setup
4.1 Power Supply
- Battery Installation: Ensure the device is powered by installing four (4) AA batteries correctly into the battery compartment.
- External Power: Alternatively, connect a compliant 9V DC adapter to the device's external power input.
Note: Due to transportation restrictions, batteries may not be included in certain regions. Users must prepare compatible AA batteries before operation.

4.2 Initial Placement
- Place the instrument on a stable and level surface to ensure accurate measurements.
4.3 Grain Type Selection
- Select the appropriate grain type according to the sample to be tested using the device's control buttons. Refer to the "Code Reference Table" in the Specifications section for guidance.
5. Operation
5.1 Sample Preparation and Loading
- Use the feed bucket to take the sample.
- Select the corresponding grain type using the up/down buttons on the device.
- Remove the funnel on the feed bucket and level the sample using the funnel edge, ensuring uniform distribution without excessive compaction.
- Confirm that the sample volume meets the device's measurement requirement.

5.2 Measurement Process
- Place the bucket steadily on the tester and press the sample gate switch.
- Start the measurement process using the control keypad.
- Wait for the measurement to complete within approximately 10 seconds.
- The moisture reading will appear in 2 seconds; the machine automatically displays and announces the data.

5.3 Data Reading and Additional Information
- Read the displayed moisture content, temperature, weight, and calculated average value from the LCD screen.
- Press the "▲" button to show sample weight.
- Press the "▼" button to show bulk density.
- Press "Confirm" to display the average value.
- Press "Type" to display the temperature.
- Record the data if necessary.

5.4 Post-Measurement
- After measurement, remove the sample and clean the chamber as described in the Maintenance section.
6. Maintenance
6.1 Cleaning
- Clean the measuring chamber and housing with a dry, soft cloth after each use.
- Do not use corrosive or abrasive cleaning agents, as these can damage the device.
6.2 Storage
- Store the instrument in a dry and well-ventilated environment.
- Keep the device in its protective case when not in use to prevent damage.
- Remove batteries if the device will not be used for an extended period to prevent leakage and potential damage.

7. Troubleshooting
7.1 Inaccurate Readings
- Ensure the sample is free from large impurities such as stones or metal fragments.
- Verify that the correct grain type is selected for the sample being tested.
- Check that the measuring chamber is filled uniformly without excessive compaction.
- Operate the device within a suitable ambient temperature and humidity range.
7.2 Device Not Powering On
- Check if the 4 AA batteries are installed correctly and have sufficient charge. Replace if necessary.
- If using an external adapter, ensure it is a compliant 9V DC power supply and properly connected.
7.3 Display Issues (e.g., no backlight, unreadable text)
- Ensure adequate power supply. Low battery can affect display performance.
- Avoid operating in extreme temperatures.
8. Safety Warnings and Compliance
8.1 General Safety
- This device is intended for measurement of agricultural grain materials only. Do not use for hazardous or explosive substances.
- Do not disassemble or modify the device. Unauthorized modifications may affect safety and measurement accuracy.
- Use only compliant 9V DC adapters that meet applicable EU low-voltage requirements.
- Keep out of reach of children.
- Avoid exposure to direct sunlight, rain, or high humidity environments.
- Do not subject the instrument to strong vibration or mechanical shock.
8.2 Proper Disposal (WEEE Directive)
This product contains electronic components and must be disposed of in accordance with the Waste Electrical and Electronic Equipment Directive 2012/19/EU (WEEE). Do not dispose of with household waste. Please consult your local authorities for proper disposal and recycling instructions.
Note: The above warning information is for reference only. Final warning language must comply with the official language requirements of the destination EU country.
8.3 Compliance Disclaimer
This document is provided for product instruction purposes only. It does not constitute legal advice. The seller is responsible for ensuring compliance with destination market regulations.
9. User Tips
- For consistent results, always ensure your grain samples are clean and free of debris before testing.
- Take multiple readings for a batch of grain and use the average value for improved accuracy.
- Utilize the customizable grain settings (P21-P24) for specific or less common grain types not pre-programmed.
- The portable design and battery power make this meter excellent for quick checks directly in the field or storage facilities.
10. Frequently Asked Questions (FAQ)
- Q1: Can grain types be customized?
- A1: Yes, in addition to the 24 built-in grain types, the device allows users to customize grain settings as needed (P21-P24).
- Q2: What are the power supply options?
- A2: The device can operate with 4 AA batteries for portability or be powered by an external 9V DC adapter.
- Q3: Is it suitable for field use?
- A3: Yes, the device is lightweight and portable, battery-powered, and equipped with a backlit display, making it ideal for on-site testing and field applications.
11. Additional Resources & Support
For a detailed user manual and further documentation, please refer to the official PDF document:
For technical support or inquiries, you may contact the seller:
- WhatsApp: +86 19542723588
- Email: celiachen008@gmail.com
