1. Introducció
Thank you for choosing the yieryi WiFi Temp PH ORP Controller Meter. This advanced device is designed for continuous monitoring and analysis of water quality parameters including pH, ORP (Oxidation-Reduction Potential), and Temperature. With integrated WiFi connectivity, it allows for real-time data transfer, remote monitoring via a mobile application, and data logging, making it an ideal solution for maintaining optimal water conditions in various environments such as swimming pools, aquariums, and laboratories.

Figura 1: Mésview of the WiFi Temp PH ORP Controller Meter
2. Característiques clau
- 3-in-1 Monitoring: Measures pH, ORP, and Temperature simultaneously with a clear LCD display and backlight.
- WiFi Connectivity & Data Logger: Real-time data transfer and historical data viewing via the Tuya APP. Data can be exported to Excel for convenient analysis.
- Calibració: Supports easy calibration for pH, ORP, EC, TDS, and Salinity with included buffer powders. Automatic temperature compensation ensures accurate readings.
- Output Power Relay: Features corresponding pH or ORP output power sockets to control external devices (e.g., oxygen pumps, CO2-regulators, O3 ozonizers) based on set pH/ORP values.
- Fàcil d'utilitzar: Digital pH tester with fully customizable parameter settings and abnormal alarm notifications via the APP.
- Aplicació àmplia: Suitable for water sources, aquariums, hydroponics, laboratories, spas, fish tanks, swimming pools, and other water systems.
- Protecció de fusibles: Integrated fuse protects the circuit when current is abnormal.
- Back Suspension Hole: Allows for flexible wall mounting.
3. Especificacions
| Paràmetre | Valor |
|---|---|
| Número de model | PH-W2839EU |
| Tipus de visualització | DIGITAL (with Backlight) |
| És un dispositiu intel·ligent | Sí |
| Bateria inclosa | No |
| Substància química molt preocupant | Cap |
| Certificació | CE |
| Origen | Xina continental |
| Font d'alimentació | AC230V EU / AC120V US |
| Compensació de temperatura | 0°C~50°C |
| Temperatura de funcionament | 0 ℃ ~ 50 ℃ |
| Pes | 360 g |
| Mida del controlador | 160 mm x 106 mm x 40 mm |
| Power Plug & Control Output Size | 130 mm x 65 mm x 55 mm |
| Mesura de pH | |
| Interval | 0.00 pH-14.00 pH |
| Resolució | 0.01 pH |
| Precisió | ± 0.1 pH |
| Interval de configuració de l'alarma | 0.00-14.00 pH |
| Mesura ORP | |
| Interval | -2000mv-+2000mv |
| Resolució | 1mv |
| Precisió | ±5mv |
| Interval de configuració de l'alarma | -2000~+2000mv |
| Mesura de la temperatura | |
| Interval | 0 ℃ ~ 50 ℃ (32 °F ~ 122 °F) |
| Resolució | 0.1 ℃ (0.2 °F) |
| Precisió | ± 1.0 ℃ |
| EC Measurement (W2823 Model) | |
| Interval | 0-19000us/cm, 0-199.0ms/cm |
| Resolució | 1us/cm (<1000us/cm), 10us/cm (>1000us/cm), 0.1ms/cm |
| Precisió | ±2% FS |
| Interval de configuració de l'alarma | 0~20000us/cm |
| TDS Measurement (W2826 Model) | |
| Interval | 0-19990ppm, 0-199.0ppt |
| Resolució | 1ppm (<1000ppm), 10ppm (>1000ppm), 0.1ppt |
| Precisió | ±2% FS |
| Interval de configuració de l'alarma | 0~20000 ppm |
| Salinity Measurement (W2825 Model) | |
| Interval | 0-199.9 ppt |
| Resolució | 1ppm (<1000ppm), 10ppm (>1000ppm), 0.1ppt |
| Precisió | ±2% FS |
| Interval de configuració de l'alarma | 0~20000 ppm |

Figura 2: Dimensions del dispositiu
4. Contingut del paquet
El paquet inclou els articles següents:
- 1 unitat de controlador
- 1 sonda de pH
- 1 sonda ORP
- 1 x sonda de temperatura
- 2 x ventoses
- 4 x cargols
- 1 x manual d'usuari en anglès
- pH Buffer Powder (for calibration)
- ORP Buffer Powder (for calibration)

Figura 3: Contingut del paquet
5. Instruccions de configuració
- Connectar els elèctrodes: Remove the protective cap from the pH electrode, temperature electrode, and ORP electrode. Connect these electrodes to their corresponding sockets on the controller unit.
- Neteja els elèctrodes: Wash the electrodes in distilled water and gently dry them with filter paper.
- Encès: Plug the device into a suitable power outlet (AC230V EU or AC120V US, depending on your model) to turn it on.
- Col·locació: Position the controller in a stable location. The unit features a back suspension hole for flexible wall mounting.
- Diagrama de cablejat: For complex setups, refer to the wiring diagram below for connecting external control devices like CO2 reactors or solenoid valves.

Figure 4: Typical Aquarium Setup with Controller

Figure 5: High-Precision Electrodes
6. Calibració
Calibration is crucial for accurate measurements. It is recommended to calibrate the device in the following situations:
- If the device has not been calibrated for a long time.
- After regular and long-term continual use.
- When high accuracy is required for your application.
6.1. pH Calibration (3 Points)
- Prepare three clean beakers with standard buffer solutions: pH 6.86, pH 4.00, and pH 9.18 (at 25°C).
- For accurate calibration, fill one buffer solution (e.g., pH 6.86) into two separate beakers. Use one for cleaning the electrode and the other for calibration to minimize pollution.
- Plug in and turn on the device.
- Immerse the pH electrode into the standard pH 6.86 buffer solution. Stir gently until the value stabilizes.
- Press and hold the "CAL" button for 5 seconds. The screen will display "00.00" (or similar) indicating pH 6.86 automatic correction mode. The meter will automatically identify the standard buffer solution. Once the displayed value corresponds to the buffer solution, the calibration for pH 6.86 is complete.
- Netegeu l'elèctrode amb aigua destil·lada.
- Immerse the pH electrode into the standard pH 4.00 buffer solution. Press and hold the "CAL" button for 5 seconds. The screen will display "00.00" (or similar) indicating pH 4.00 automatic correction mode. Once the displayed value corresponds to the buffer solution, the calibration for pH 4.00 is complete.
- Repeat the cleaning step.
- Immerse the pH electrode into the standard pH 9.18 buffer solution. Press and hold the "CAL" button for 5 seconds. The screen will display "00.00" (or similar) indicating pH 9.18 automatic correction mode. Once the displayed value corresponds to the buffer solution, the calibration for pH 9.18 is complete.
Nota: Users can choose calibration solutions from 6.86, 4.00, 9.18, 7.00, 4.00, 10.00. The factory default calibration is 6.86, 4.00, 9.19. Be careful not to use the wrong calibration solution during the process.

Figure 6: pH Measurement in a Pool
Video 1: pH Calibration Demonstration
6.2. ORP Calibration (W2839)
- Plug in the power to turn on the device.
- Immerse the ORP electrode in distilled water for five minutes.
- Immerse the ORP electrode in ORP calibration solution of 265mv (25°C) and stir gently.
- When the reading is stable, press and hold the "CAL" button for about 5 seconds. The screen will display "290" or similar.
- Adjust the value using the "TEMP +" or "TEMP -" buttons until the display shows "265".
- Clean the electrode with distilled water and dry with filter paper.

Figure 7: ORP Measurement in a Fish Pond
6.3. EC Calibration (W2823)
- Plug in the power to turn on.
- Immerse the EC electrode in distilled water for five minutes.
- Immerse the EC electrode in EC calibration solution of 12800us/cm (25°C) and stir gently.
- When the reading is stable, press and hold the "CAL" button for about 5 seconds. The screen will display "12700" or similar.
- Adjust the value using the "TEMP +" or "TEMP -" buttons until the display shows "12800-12900".
- Clean the electrode with distilled water and dry with filter paper.
- Immerse the electrode in EC calibration solution of 1413us/cm (25°C) and stir gently until the displayed value is the same as or close to the value of the calibration solution.
- Clean the electrode with distilled water and dry with filter paper.
6.4. TDS Calibration (W2826)
- Plug in the power to turn on.
- Immerse the TDS electrode in distilled water for five minutes.
- Immerse the TDS electrode in TDS calibration solution of 6440ppm (25°C) and stir gently.
- When the reading is stable, press and hold the "CAL" button for about 5 seconds. The screen will display "6780" or similar.
- Adjust the value using the "TEMP +" or "TEMP -" buttons until the display shows "6430-6450".
- Clean the electrode with distilled water and dry with filter paper.
- Immerse the TDS electrode in TDS calibration solution of 1382ppm (25°C) and stir gently until the displayed value is the same as or close to the value of the calibration solution.
- Clean the electrode with distilled water and dry with filter paper.
6.5. Salinity Calibration (W2825)
- Plug in the power to turn on.
- Immerse the salinity electrode in distilled water for five minutes.
- Immerse the salinity electrode in salinity calibration solution of 35 ppt (25°C) and stir gently.
- When the reading is stable, press and hold the "CAL" button for about 5 seconds. The screen will display "35.40" or similar.
- Adjust the value using the "TEMP +" or "TEMP -" buttons until the display shows "35ppt".
- Clean the electrode with distilled water and dry with filter paper.
7. Instruccions de funcionament
7.1. Mesura bàsica
- After connecting the electrodes and powering on the device, immerse the pH electrode, temperature electrode, and ORP electrode (or TDS/EC/Salinity electrode for relevant models) into the testing liquid.
- Stir gently and wait for the readings to stabilize on the LCD display.
- Read the final values.
7.2. Selecció de la unitat de temperatura
Press the "TEMP" button to toggle between Celsius (°C) and Fahrenheit (°F) temperature measurements.
7.3. Mobile APP Connection and Data Viewing
- Download Tuya Smart APP: Cerca "Tuya Smart" in your mobile APP store (iOS or Android) and download it.
- Registra't/Iniciar sessió: Register an account or log in to the Tuya Smart APP.
- Afegeix un dispositiu: On the Tuya APP homepage, click to add a device. Long press the WiFi icon on the controller unit to enter pairing mode. The APP will search for nearby devices automatically.
- Connecteu-vos a WiFi: Select your device from the discovered list and enter your WiFi password. Ensure your mobile phone and the device are connected to the same WiFi network.
- View Paràmetres: Once connected, the device icon will appear in the APP. Click on it to view various parameters in real-time, including current pH, ORP, and temperature values, as well as historical data (daily, weekly, monthly).
- Control multidispositiu: One mobile phone can connect to and control multiple devices simultaneously.
- Exportació de dades: The APP allows you to export historical data to your email in EXCEL format for further analysis.

Figure 8: WiFi Connection and Tuya APP Interface

Figure 9: Multi-Device Control via APP

Figure 10: Data Export Functionality
8. APP Alarm Settings
The Tuya APP allows you to set alarm values for pH, ORP, and Temperature. When the measured value exceeds the set high or low limit, the control output will be activated (powered on) to trigger connected equipment.
8.1. Setting pH Alarms
- Open the Tuya APP and navigate to the pH page for your device.
- You can set a "pH High alarm setting" and a "pH Low alarm setting". For example, if the low end is set to 4 and the high end to 6, the power supply will be activated when the pH value is between 4-6.
- Important: Be careful not to set both high and low alarms simultaneously in a way that would cause conflicting or incorrect alarm activation.
8.2. Setting ORP Alarms
- Open the Tuya APP and navigate to the ORP page for your device.
- Set the "ORP High alarm setting" and "ORP Low alarm setting" according to your requirements.
8.3. Advanced Control Settings (C-1, C-2, C-3, C-4)
The device offers advanced control settings accessible by long-pressing the SET1 key for 1 second. This allows for fine-tuning of alarm and control behaviors:
- C-1: Regulates EC (TDS/SALT/ORP) high and low end out of the range of the alarm.
- C-2: Adjusts the EC (TDS/SALT/ORP) alarm within the high and low end of the range.
- C-3: Represents an alarm out of the high and low end of the temperature control range.
- C-4: Represents the alarm within the high and low end of the temperature adjustment range.
After making adjustments, wait 5 seconds for the settings to be saved. The code will disappear, indicating the setting is complete.

Figure 11: APP Alarm Settings Interface
9. Solució De Problemes
| Problema | Causa possible | Solució |
|---|---|---|
| pH/ORP control not appearing in the app, only temperature. | Incorrect device model selected, app version outdated, or sensor not properly connected/calibrated. | Ensure you have the correct device model (e.g., PH-W2839EU for pH/ORP/Temp). Update the Tuya Smart app to the latest version. Verify all electrodes are securely connected and calibrated. |
| Lectures inexactes. | Electrodes are dirty, damaged, or require calibration. | Clean electrodes with distilled water. Perform a full calibration for the relevant parameter (pH, ORP, EC, TDS, Salinity). If issues persist, consider replacing the electrode. |
| El dispositiu no es connecta a la xarxa Wi-Fi. | Incorrect WiFi password, device too far from router, or incompatible WiFi frequency (only 2.4GHz supported). | Ensure correct WiFi password. Move the device closer to the router. Verify your router is broadcasting on 2.4GHz. Reset the device and try pairing again. |
| External control equipment not activating. | Incorrect alarm settings, equipment not properly plugged into the control output, or equipment malfunction. | Check your alarm settings in the Tuya APP (high/low limits). Ensure the external equipment is correctly plugged into the corresponding pH or ORP output socket. Test the external equipment independently. |
10. Manteniment
- Neteja d'elèctrodes: Regularly clean the electrodes with distilled water, especially before and after calibration or measurement. For stubborn residue, use a mild cleaning solution specifically designed for pH/ORP electrodes.
- Emmagatzematge d'elèctrodes: Always replace the protective cap on the electrodes when not in use to prevent drying out and damage. Store electrodes in their original storage solution or a suitable electrode storage solution.
- Neteja general: Wipe the main controller unit with a soft, dry cloth. Do not use abrasive cleaners or immerse the unit in water.
- Substitució de fusibles: The device is equipped with fuse protection. If the device stops functioning due to an abnormal current, check and replace the fuse if necessary. Ensure the replacement fuse matches the original specifications.
11. Consells d'usuari
- Precisió de la calibració: When calibrating, use separate buffer solutions for cleaning and actual calibration to reduce contamination and improve accuracy.
- Configuració d'alarma: Exercise caution when setting both high and low alarms simultaneously to avoid unintended activation of connected equipment. Ensure your settings align with your desired control logic.
- Especificacions del model: Be aware that different models (e.g., PH/ORP, PH/EC, PH/TDS, PH/SALT) may have different electrodes and calibration procedures. Always refer to the specific instructions for your model.
- Preses de corrent: The PH ORP EU PLUG model does include two power outlets for controlling external equipment based on pH and ORP values. This allows for automated regulation of your water system.
12. Garantia i Suport
All defects in materials and manufacture of this device are guaranteed for one year from the date of purchase. Within this one-year period, please return the parts to the dealer or our office for free repair if the damage is not caused by the user's negligence or wrong operation.
For technical support or warranty claims, please contact your retailer or the official yieryi support channel.