YIERYI Bluetooth Dissolved Oxygen Meter

Keep your fish, plants and water systems healthy with the YIERYI Bluetooth Dissolved Oxygen Meter.
Simply float the star-shaped meter in the water and watch real-time DO and temperature data on your phone.

Why you’ll love it

• Accurate DO monitoring – Measures dissolved oxygen from 0–199.9% or 0–20 mg/L with 0.01 mg/L resolution and ±3% F.S accuracy.

• Built-in temperature sensor – 0–50°C (32–122°F) range with 0.1°C resolution for precise water temperature control.

• Bluetooth app control – Connects to your phone (iOS & Android) within 10 m to view live data, history and alerts in the free app.

• Real-time & historical data – Check hourly, daily, weekly and monthly curves to see water quality trends at a glance.

• Custom alarms – Set high/low DO and temperature thresholds and get abnormal-value alerts so you can act before fish are stressed.

• Data export – Export records to Excel for reporting, email and sharing with your team or clients.

• Easy to use – Suspension design, bright backlit LCD, sensitive metal probe and simple Mode/Temp-Cal buttons.

• Rechargeable & auto-off – DC5V magnetic charging, about 30-minute auto shutdown (stays on when Bluetooth is connected).

DO range: 0–199.9% / 0–20 mg/L

DO resolution: 0.1% / 0.01 mg/L

DO accuracy: ±3% F.S

Temperature range: 0–50°C (32–122°F)

Temperature resolution: 0.1°C (0.2°F)

Temperature accuracy: ±1.0°C

Operating & compensation temp: 0–50°C

• Home and professional aquariums
• Koi ponds & freshwater aquaculture
• Aquatic plant tanks & hydroponics
• Wastewater treatment & environmental monitoring
• Tap water and industrial water applications

Shipping Policy

• Orders are processed within 1-2 business days (excluding weekends and holidays).
• Free shipping is available for the United States, select European countries, and various Asian regions, with a delivery timeframe of 7-20 business days.
• Duties and taxes are not included and will be collected by the carrier at delivery.
• Upon shipment, you’ll receive a tracking number via email for real-time updates.

Return Policy

• We offer a 7-day return policy, starting from the day you receive your item.
• Items must be unused, in their original condition with tags and packaging, and accompanied by proof of purchase.

Shipping Costs for Returns:

• Quality Issues: We cover the return shipping costs.
• Personal Reasons: Customers cover the return shipping costs.

Non-Returnable Items:

• Used or worn products.
• Sale/discounted/promotional items.
• Gift cards.

Refund Process:

• Refunds will be processed through your original payment method within 5-8 business days after approval.