1. Product Overview
The Landtek KIB0339 is a versatile 7-in-1 water quality meter designed for accurate measurement of multiple parameters. It can measure pH (acidity and alkalinity), TDS (Total Dissolved Solids), EC (Electrical Conductivity), ORP (Oxidation-Reduction Potential), S.G (Specific Gravity), Salinity, and Temperature. This device is suitable for testing various aqueous solutions, including drinking water, pools, aquariums, and hydroponic systems.

Image 1: The Landtek KIB0339 7-in-1 Water Quality Tester displaying readings while submerged in an aquarium.
2. Safety Information
- Keep the device out of reach of children.
- Do not disassemble or modify the device.
- Ensure the battery compartment is sealed correctly to maintain water resistance.
- Avoid dropping or subjecting the device to severe impact.
- Always clean the electrode thoroughly after each use to prevent contamination and ensure accurate future readings.
3. Included Components
The package includes the following items:
- 1 x Multi-functional Tester (Landtek KIB0339)
- 3 x pH Buffer Powder (pH4.0 / pH6.86 / pH9.18)

Image 2: The Landtek KIB0339 7-in-1 Water Quality Tester, its retail packaging, and the three included pH buffer powders for calibration.
4. Product Features
- 7-in-1 Multi-parameter Measurement: Measures PH, TDS, EC, ORP, S.G, Salinity, and Temperature.
- Automatic Temperature Compensation (ATC): Ensures accurate pH readings within a temperature range of 0℃-60℃ (32°F-140°F), minimizing errors caused by temperature fluctuations.
- Dual Salinity Measurement: Provides salinity readings in both percentage (%) and parts per million (ppm), ideal for freshwater and saltwater applications.
- Accurate pH Testing: Measures pH from 0-14 with 0.01 pH resolution and features a 3-point calibration method for enhanced accuracy.
- Versatile Application: Compact, portable, and waterproof design suitable for drinking water, laboratory testing, hydroponics, spas, aquariums, and seawater.

Image 3: A detailed diagram of the Landtek KIB0339 7-in-1 Water Quality Tester, highlighting its key components such as the battery case, screen display, On/Off button, Hold/Temp button, Mode/Cal button, protective cap, max immersion line, and probe.
5. Setup
5.1 Battery Installation
- Unscrew the battery cap at the top of the device.
- Insert 3 LR44 batteries, ensuring correct polarity.
- Securely screw the battery cap back on to maintain the device's waterproof seal.
5.2 Initial Preparation
- Remove the protective cap from the electrode.
- Rinse the electrode with distilled water before first use.
6. Operation
6.1 Power On/Off
- Press the ON/OFF button to turn the meter on.
- Press and hold the ON/OFF button for 5 seconds to turn the meter off.
6.2 Switching Measurement Modes
- Press the MODE/CAL button to cycle through the different measurement modes: PH, TDS, EC, ORP, Salinity (ppm), Salinity (%), S.G, and Temperature.
6.3 Taking Measurements
- Submerge the electrode into the sample solution, ensuring it does not exceed the maximum immersion line.
- Gently stir the meter and wait for the reading to stabilize on the display.
- Press the HOLD/TEMP button to freeze the current reading on the display. Press again to release.

Image 4: The digital display of the Landtek KIB0339 7-in-1 Water Quality Tester showing different measurement modes including pH, EC (µS/cm), TDS (ppm), Salinity (ppm), Salinity (%), S.G, and ORP (mV).
7. Calibration
7.1 pH Calibration (3-Point Method)
- Prepare the pH buffer solutions: Empty each pack of pH 4.00, pH 6.86, and pH 9.18 buffer powder into separate 250ml containers of distilled water. Stir gently until fully dissolved.
- Turn on the pH meter and select pH mode.
- Rinse the electrode with purified water and gently dry it.
- Submerge the electrode into the pH 6.86 standard solution.
- Press and hold the MODE/CAL button for 6 seconds until the reading stabilizes and stops flashing. This indicates successful pH 6.86 calibration.
- Rinse the probe with distilled water.
- Repeat steps 4-6 for pH 4.00 and pH 9.18 solutions.
- After calibrating all three solutions, the pH calibration is complete.

Image 5: Visual instructions for calibrating the pH meter using pH 4.00, pH 6.86, and pH 9.18 buffer powders. Steps include dissolving powders, powering on, immersing the electrode, holding the CAL button, and rinsing between solutions.
7.2 EC/TDS/Salinity Calibration
The EC/TDS/Salinity functions are factory calibrated and generally do not require user calibration. If recalibration is needed, refer to the detailed instructions in the full product manual or contact customer support.
Video 1: Demonstration of an 8-in-1 Digital Water Quality Tester, showing its unboxing, various measurement modes, and ease of use. This video is provided by a seller and illustrates similar functionality to the Landtek KIB0339.
8. Maintenance
8.1 Electrode Cleaning
- After each use, rinse the electrode thoroughly with distilled water to remove any residue.
- Gently wipe the electrode dry with a clean, soft cloth or tissue. Do not rub vigorously.
8.2 Storage
- Always replace the protective cap after use.
- Store the meter in a cool, dry place.
8.3 Battery Replacement
- When the battery indicator on the display shows low power, replace the 3 LR44 batteries as described in the Setup section.
9. Troubleshooting
- Inaccurate Readings: Ensure the electrode is clean and properly calibrated. Check if the buffer solutions are fresh.
- Device Not Turning On: Check battery installation and ensure batteries are not depleted. Replace if necessary.
- Slow Response: The electrode might be dry or contaminated. Soak it in distilled water for a few minutes, then clean and recalibrate.
Video 2: A demonstration of a Dr.meter pH meter, showing its calibration process and use in various water samples. This video is provided by a seller and offers insights into pH meter operation and calibration relevant to the Landtek KIB0339.
10. Specifications
| Parameter | Value |
|---|---|
| Manufacturer | Landtek |
| Part number | KIB0339 |
| Item Weight | 160 g |
| Parcel Dimensions | 21.8 x 8.1 x 5.2 cm |
| Batteries | 3 LR44 batteries required (included) |
| Measurement Accuracy (pH) | 0.00~14.00pH |
| Battery Cell Type | Alkaline |
| Country of origin | China |
11. Applications
The Landtek KIB0339 is suitable for a wide range of applications, including:
- Drinking water quality testing
- Swimming pools and spas
- Aquariums and fish tanks
- Hydroponics and gardening
- Laboratory and educational use

Image 6: A collage illustrating various applications of the 7-in-1 water quality tester, including laboratory testing, hydroponics, drinking water, fish farming, and pool water.
Video 3: An instructional video demonstrating the use and calibration of an ORP Redox Meter Tester for pools. This video is provided by a seller and is relevant for understanding the ORP measurement function of the Landtek KIB0339.
12. Warranty and Support
For warranty information, technical support, or any inquiries regarding your Landtek KIB0339 7-in-1 Water Quality Tester, please refer to the contact details provided in your product packaging or visit the official Landtek website.