Introduction
Thank you for choosing the ORIA Wireless Digital Refrigerator Thermometer. This device is designed to help you monitor temperatures in your refrigerator, freezer, and ambient indoor environment with ease. It features two wireless sensors, an audible alarm for temperature deviations, and a clear LCD display for real-time readings and historical maximum/minimum temperatures.
Please read this manual thoroughly before use to ensure proper operation and to maximize the lifespan of your thermometer.
What's in the Box
Upon unpacking, please verify that all components are present and in good condition:
- 1 x Refrigerator Thermometer (Main Unit)
- 2 x Wireless Sensors
- 1 x User Manual

Image: Contents of the product packaging, including the main thermometer unit, two wireless sensors, and the instruction manual.
Product Overview
Main Unit Display and Buttons

Image: Detailed view of the main unit's LCD display and button functions.
The main unit features a large LCD display showing temperatures from two wireless sensors (Sensor 1 and Sensor 2) and the indoor temperature (from the main unit itself). It also displays maximum and minimum recorded temperatures for each channel.
- Sensor 1 Display: Shows temperature from the first wireless sensor.
- Sensor 2 Display: Shows temperature from the second wireless sensor.
- Indoor Temperature Display: Shows ambient temperature where the main unit is placed.
- MAX/MIN Records: Displays the highest and lowest temperatures recorded within the last 24 hours for each channel.
- Alarm Indicators: Visual cues for temperature alarms.
Control Buttons:
- ALARM SENSOR1 / ALARM SENSOR2 / ALARM INDOOR: Press to activate/deactivate the audible alarm for the respective sensor or indoor temperature.
- +/°C/°F: Press to switch between Celsius (°C) and Fahrenheit (°F) temperature units. Also used to increase alarm values during setting.
- -: Used to decrease alarm values during setting.
- CLEAR: Press to clear the MAX/MIN temperature records for all channels.
Wireless Sensors:
The two wireless sensors transmit temperature data to the main unit. Each sensor has a signal indicator and is designed for placement in refrigerators, freezers, or other remote locations.

Image: The main display unit alongside the two wireless temperature sensors.
Setup Guide
Battery Installation:
The main unit requires 2 AAA batteries, and each wireless sensor requires batteries (type not specified in product data, typically AAA or AA). Ensure to use fresh, high-quality alkaline batteries for optimal performance.
- Main Unit: Open the battery compartment on the back of the main unit. Insert 2 AAA batteries, observing the correct polarity (+/-). Close the compartment. The display should power on.
- Wireless Sensors: Open the battery compartment on each wireless sensor. Insert the required batteries (e.g., 2 AAA per sensor), observing the correct polarity. Close the compartment.
Important Pairing Note: For best results, install batteries in the main unit first, then in each sensor one by one. Place the sensors near the main unit during initial setup to facilitate pairing. It may take up to 30 minutes for sensors to fully register and display accurate temperatures after initial setup.
Placement Options:
The main unit offers multiple placement options:
- Standing: Use the integrated bracket on the back to stand the unit on a flat surface.
- Hanging: Utilize the hanging hole on the back to mount it on a wall or hook.
- Magnetic: The main unit has magnets on the back for attachment to metallic surfaces like a refrigerator door.

Image: Visual guide to the standing, hanging, and magnetic placement options for the main unit.
Place the wireless sensors inside your refrigerator, freezer, or any other area where you wish to monitor temperature. Ensure the sensors are protected from direct water exposure.

Image: Example placement of wireless sensors inside a refrigerator and freezer.
Operating Instructions
Temperature Display:
Once batteries are installed and sensors are paired, the main unit will display the current temperatures for Sensor 1, Sensor 2, and the Indoor environment. The display also shows the maximum (MAX) and minimum (MIN) temperatures recorded for each channel within the last 24 hours.
Switching Temperature Units (°C/°F):
Press the +/°C/°F button on the main unit to toggle between Celsius (°C) and Fahrenheit (°F) temperature units.
Clearing MAX/MIN Records:
To clear the recorded maximum and minimum temperatures, press the CLEAR button. The display will reset the MAX/MIN values to the current temperature.
Setting and Using the Alarm Function:
The thermometer features an audible alarm that activates when temperatures exceed or fall below your preset maximum or minimum values. The alarm function will not activate until 10 minutes after it is initially turned on.

Image: Visual representation of the audible alarm feature and its settings.
- Select Channel: Press the ALARM SENSOR1, ALARM SENSOR2, or ALARM INDOOR button to select the channel for which you want to set the alarm.
- Enter Setting Mode: Press and hold the selected ALARM button for approximately 3 seconds until the MAX alarm value starts flashing.
- Set MAX Alarm: Use the + or - buttons to adjust the maximum alarm temperature. Press the ALARM button again to confirm and move to the MIN alarm setting.
- Set MIN Alarm: Use the + or - buttons to adjust the minimum alarm temperature. Press the ALARM button again to confirm and exit setting mode.
- Activate Alarm: Once set, the alarm icon will appear on the display for that channel. If the temperature goes outside the set range, the alarm will sound.
- Silence Alarm: Press any button to silence the alarm when it sounds. The alarm icon will continue to flash until the temperature returns to the acceptable range.
Maintenance
Cleaning:
Wipe the main unit and sensors clean with a soft, damp cloth. Do not use abrasive cleaners or immerse the units in water. The sensors are not waterproof and should be protected from direct moisture.
Battery Replacement:
When the battery indicator on the display shows low battery, replace all batteries in the main unit and/or the respective sensor(s) promptly to ensure continuous and accurate readings. Follow the battery installation steps in the Setup Guide.
Storage:
If the thermometer will not be used for an extended period, remove the batteries from both the main unit and the sensors to prevent battery leakage and damage.
Troubleshooting
| Problem | Possible Cause | Solution |
|---|---|---|
| No display on main unit. | Batteries are dead or incorrectly installed. | Replace batteries, ensuring correct polarity. |
| Sensor temperature not displayed or shows "--". |
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| Temperature readings are inaccurate. |
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| Alarm does not sound when temperature is out of range. |
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Specifications
| Feature | Detail |
|---|---|
| Model Name | ORAU-WA50B |
| Brand | ORIA |
| Color | Black |
| Display Type | Digital LCD |
| Connectivity Technology | Wireless Sensor |
| Power Source (Main Unit) | Battery Powered (2 AAA batteries required) |
| Power Source (Sensors) | Battery Powered (Type not specified, typically AAA) |
| Indoor Temperature Range | -10℃ to 60℃ (14℉ to 140℉) |
| Outdoor/Sensor Temperature Range | -40℃ to 60℃ (-40℉ to 140℉) |
| Transmission Range | 100M / 328ft (open area) |
| Special Feature | Audible Alarm, Min/Max Display |
| Outer Material | Acrylonitrile Butadiene Styrene |
| Product Care Instructions | Wipe Clean |
| Item Weight | 8.1 ounces |
| Item Length | 4.1 Inches (Main Unit) |
| Response Time | 5 seconds |

Image: Product dimensions for the main unit and wireless sensor.
Warranty and Support
For warranty information and customer support, please refer to the contact details provided in the original product packaging or visit the official ORIA website. Keep your purchase receipt as proof of purchase for any warranty claims.
Manufacturer: ORIA
Date First Available: May 11, 2020



