Qiwei JPB-70A Portable Dissolved Oxygen Meter for Aquaculture Malaysia
Qiwei JPB-70A Portable Dissolved Oxygen Meter for Aquaculture Malaysia
Maintaining the correct dissolved oxygen level is essential for healthy fish, shrimp and other aquatic organisms. The Qiwei JPB-70A Portable Dissolved Oxygen Meter provides a practical and economical way to check dissolved oxygen directly at fish ponds, aquaculture farms, water tanks and wastewater treatment facilities.
The JPB-70A combines a compact handheld display with an external polarographic dissolved oxygen electrode, allowing operators to place the probe directly into the water while reading the result comfortably from above.
Why Is Dissolved Oxygen Important?
Dissolved oxygen, commonly expressed in mg/L, is the amount of oxygen available in water for fish and other aquatic organisms.
Low dissolved oxygen can lead to:
Fish gathering near the water surface
Reduced feeding and slower growth
Increased stress and disease risk
Sudden fish mortality
Poor biological treatment performance
Inefficient aeration system operation
Visual observation alone cannot confirm the actual oxygen concentration. A portable DO meter gives the operator a measurable result before conditions become critical.
Key Features of the Qiwei JPB-70A
Dissolved oxygen measurement range: 0.0–19.9 mg/L
Resolution: 0.1 mg/L
Basic dissolved oxygen accuracy: approximately ±0.3 mg/L
Temperature measurement range: 0–40°C
Automatic temperature compensation
Fast-response polarographic membrane electrode
Clear dot-matrix LCD display
Portable design for field measurement
Displays dissolved oxygen and water temperature
Suitable for routine freshwater and general water-quality checking
The 0.1 mg/L resolution is suitable for routine aquaculture, fish-pond and wastewater monitoring. It provides a straightforward reading without unnecessary operating complexity.
Applications in Malaysia
The Qiwei JPB-70A can be used for:
Freshwater fish ponds
Shrimp and aquaculture farms
Hatcheries and breeding tanks
Koi ponds
Aquariums
Water-treatment facilities
Wastewater aeration tanks
Rivers, lakes and reservoirs
Agricultural water systems
Schools and general laboratories
It is suitable for users in Selangor, Kuala Lumpur, Johor, Penang, Perak, Pahang, Kedah, Kelantan, Terengganu, Sabah and Sarawak who require a portable instrument for on-site dissolved oxygen checks.
How to Use the JPB-70A
Inspect the dissolved oxygen probe and membrane before measurement.
Switch on the instrument and allow the reading to stabilise.
Immerse the probe in the water sample.
Move the probe gently or ensure that water is flowing across the membrane.
Wait for the dissolved oxygen reading to stabilise.
Record both the DO value and water temperature.
Rinse the probe with clean water after testing.
A polarographic DO probe consumes a small amount of oxygen during measurement. Therefore, some water movement across the membrane is necessary to obtain a representative result.
Where Should a Fish Pond Be Tested?
A single reading may not represent the entire pond. For better monitoring, test:
Near the water inlet
Around the centre of the pond
Close to the aerator
Away from the aerator
At different water depths
Early in the morning
During periods of cloudy or rainy weather
Dissolved oxygen is often lowest before sunrise because aquatic plants and microorganisms continue consuming oxygen during the night.
JPB-70A versus Simple Water Test Pens
Ordinary pH, EC and TDS pens cannot measure dissolved oxygen. Each parameter serves a different purpose:
pH meter: Measures acidity or alkalinity
EC/TDS meter: Measures dissolved ionic content
Turbidity meter: Measures water cloudiness
Dissolved oxygen meter: Measures oxygen available in the water
For aquaculture monitoring, dissolved oxygen should be checked together with temperature and pH to provide a more complete understanding of pond conditions.
Important Electrode Maintenance
The JPB-70A uses a polarographic membrane-type dissolved oxygen electrode. Proper maintenance is important for stable measurement.
Users should regularly check:
Whether the membrane is damaged or wrinkled
Whether air bubbles are trapped beneath the membrane
The condition of the electrolyte
The cleanliness of the probe
Whether calibration is required
Whether the reading responds normally in water
Membrane caps and electrolyte are consumable items. Keeping spare membrane components available can help avoid interruption during field use.
Who Should Choose the Qiwei JPB-70A?
The JPB-70A is a suitable choice for customers who need:
An economical portable DO meter
Routine field measurements
Simple operation
Replaceable electrode consumables
On-site aquaculture or wastewater checks
A practical alternative to higher-priced laboratory instruments
For applications requiring data logging, dissolved oxygen saturation, salinity compensation, long-term continuous monitoring or regulatory laboratory reporting, a higher-specification DO meter may be more appropriate. MTM Precision can assist with model selection according to the application and required accuracy.
Buy Qiwei JPB-70A Dissolved Oxygen Meter in Malaysia
The Qiwei JPB-70A Portable Dissolved Oxygen Meter is available from MTM Precision in Malaysia. Customers may contact us to confirm stock, probe configuration, accessories and suitability for aquaculture, fish ponds or wastewater applications.
Contact MTM Precision
MTM Precision Sdn. Bhd. (744811-A)
Telephone: +603-8080 7172
WhatsApp: +6016-660 7346
Email: mtmpre@yahoo.com / enquiry@mtmpre.com.my
Website: www.mtmpre.com.my
Showroom & Service Centre
No. 29-1 & 29-2, Jalan Bandar 18,
Pusat Bandar Puchong,
47160 Puchong, Selangor, Malaysia.
Contact MTM Precision for the Qiwei JPB-70A dissolved oxygen meter price, stock availability and technical advice in Malaysia.
18 Sep 2026
