1. Introducción
The PQWT PQ125A Water Leak Detector is a precision instrument designed for detecting leaks in pressurized indoor pipelines. It utilizes advanced acoustic technology to identify leak points, making it an invaluable asset for both experienced professionals and new users.
Key features include a user-friendly touchscreen interface with clear operational guidance, precise localization capabilities through general and location detection modes, and high-precision dual-membrane resonance sensors (DMR-H40 & DMR-V59) optimized for various indoor environments.
Video: PQ125A Product Introduction. This video provides an overview of the PQWT PQ125A Water Leak Detector and its core features.
2. Contenido del paquete
The PQWT PQ125A Water Leak Detector package includes the following components:
- Unidad anfitriona
- Auriculares
- Cargador
- Cable de datos USB
- Correa
- Mango de control
- DMR-H40 Dual-Membrane Resonance Sensor
- DMR-V59 Dual-Membrane Resonance Sensor
- Estuche de transporte

Image: All components included in the PQWT PQ125A Water Leak Detector package.
Video: PQ125 Series Pipe Water Leak Detector Unboxing. This video demonstrates the unboxing process and shows all included components.
3. Configuración
Follow these steps to set up your PQWT PQ125A Water Leak Detector:
- Colocar la correa para el hombro: Connect the host machine to the shoulder strap for comfortable carrying during operation.
- Connect Control Handle: Open the host machine's aviation connector cover, insert the aviation plug from the control handle into the host machine, and tighten securely.
- Conectar el sensor: Open the sensor's aviation connector cover, insert the aviation plug from the control handle into the sensor, and tighten the nut. For indoor detection, use either the DMR-H40 or DMR-V59 sensor.
- Conectar auriculares: Insert the headphone jack into the designated port on the host machine.
- Encendido: Press and hold the power switch on the main unit for 3-5 seconds to power on the device. The system status indicator will light up.

Image: Visual guide for connecting the components of the water leak detector.
Video: PQ125 Series Water Leak Detector Operation Video. This video demonstrates the full operational process, including setup.
4. Instrucciones de funcionamiento
The PQWT PQ125A offers different detection modes to accurately locate water leaks. Always ensure the pipeline's position and routing are understood before starting detection.
4.1. Indoor General Detection Mode
This mode is used for quickly scanning large indoor areas to identify potential leak locations. Use the DMR-H40 or DMR-V59 sensor.
- Colocación de sensores: Place the appropriate sensor (DMR-H40 for narrow spaces/walls, DMR-V59 for floors) on the ground or wall directly above the suspected pipeline.
- Ajustar configuración: Using the control handle, set the volume to 5 and gain to 3.
- Iniciar monitoreo: Press the control handle switch to begin leak monitoring. Stay at each point for approximately 8-10 seconds.
- Move Sensor: After monitoring a point, press the control handle switch again to stop listening. Move the sensor along the pipeline in 0.5-meter increments.
- Identify Suspected Leak: If the sound differs or becomes louder, and the waveform on the screen is continuous with stable amplitude, it may indicate a leak.
- Confirm Leak Location: Use this point as the center and compare signal strength in all directions to confirm the suspected leak location.

Image: The touchscreen interface in General Detection Mode.
Video: PQ125 Indoor Dual Membrane Resonance Sensors Principle. This video explains how the indoor sensors work.
4.2. Indoor Location Mode
After identifying a suspected leak area with General Detection Mode, use Location Mode for precise pinpointing. This mode captures signals from multiple points for comparison.
- Enter Location Mode: From the main interface, tap to enter Location Mode. The screen will display 16 signal collection boxes.
- Collect Data: Place the sensor on the ground or wall above the pipeline. Starting from point 01, tap anywhere inside the box to begin data collection. A blue bar will appear, and a signal value will be displayed.
- Señal de bloqueo: Once the thick bar stabilizes, tap inside the box again to lock the blue signal bar. When the signal value turns black, it means it is locked.
- Repeat Collection: After completing point 01, move the sensor to the next point (e.g., 0.5-meter increments) and repeat the data collection process until all points are collected.
- Verify Leak Point: Compare the signal strengths across the collected points. The point with the highest stable signal strength indicates the most probable leak location.

Image: The touchscreen interface in Location Mode, displaying signal collection boxes.
5. Especificaciones
| Característica | Especificación |
|---|---|
| Número de modelo | PQ-125A |
| Estilo | PQ125A-Indoor |
| Método de control | Tocar |
| La tecnología de sensores | Sensor acústico |
| Componentes incluidos | Host, Headphones, Charger, USB Data Cable, Strap, Control Handle, DMR-H40 sensor, DMR-V59 sensor, Carry case |
| Descripción de la batería | No estándar |
| Número de baterías | 2 pila no estándar (incluida) Se requieren pilas. |
| Tipo de celda de la batería | Iones de litio |
| Peso del artículo | 5.35 kilogramos (11.77 libras) |
| Dimensiones del producto | 3.15 x 4.72 x 5.91 pulgadas |

Image: Detailed diagram of the host unit's interface.
6. Mantenimiento
To ensure the longevity and optimal performance of your PQWT PQ125A Water Leak Detector, follow these maintenance guidelines:
- Limpieza: Regularly wipe the host unit, sensors, and control handle with a soft, dry cloth. Avoid using abrasive cleaners or solvents.
- Almacenamiento: Store the device and its components in the provided carry case in a cool, dry place away from direct sunlight and extreme temperatures.
- Cuidado de la batería: Charge the device fully before long-term storage. If storing for extended periods, recharge the battery every 3-6 months to prevent deep discharge.
- Protección de sensores: Ensure sensors are clean and free from debris before and after use. Avoid dropping or subjecting sensors to harsh impacts.
7. Solución de problemas
If you encounter issues with your PQWT PQ125A, refer to the following common troubleshooting tips:
- El dispositivo no se enciende:
- Asegúrese de que la batería esté cargada. Conecte el cargador y vuelva a intentarlo.
- Verify that the power button is pressed and held for 3-5 seconds.
- Sin señal o señal débil:
- Check all cable connections (control handle to host, control handle to sensor, headphones). Ensure they are securely tightened.
- Adjust the gain and volume settings on the control handle.
- Ensure the sensor is placed firmly on the surface above the pipeline.
- Verify that the correct sensor (DMR-H40 or DMR-V59) is being used for the specific detection environment.
- Lecturas inestables:
- Minimize environmental noise during detection.
- Ensure the sensor is stable and not moving during data collection at each point.
- La pantalla táctil no responde:
- Perform a soft reset by pressing the 'RST' button on the host unit.
- Asegúrese de que la pantalla esté limpia y seca.
For further assistance, please contact PQWT customer support.
8. Garantía y soporte
The main unit of the PQWT PQ125A Water Leak Detector comes with a two-year warranty and lifetime maintenance. For warranty claims, technical support, or service inquiries, please refer to the contact information provided with your purchase or visit the official PQWT websitio.
The device supports 12 languages: English, Turkish, Italian, French, Spanish, Arabic, Russian, Korean, German, Portuguese, Polish, and Vietnamese.