Qiwei JPB-70A Dissolved Oxygen Meter for Shrimp Farming Malaysia
Qiwei JPB-70A Dissolved Oxygen Meter for Shrimp Farming Malaysia
Dissolved oxygen is one of the most important water-quality parameters in shrimp farming. Inadequate oxygen can reduce feeding activity, increase stress and contribute to unstable pond conditions.
The Qiwei JPB-70A Portable Dissolved Oxygen Meter allows shrimp-farm operators to perform routine DO checks directly at ponds, nursery tanks and other aquaculture systems.
It provides an economical option for farms that need practical field measurements without advanced data-logging functions.
Why Dissolved Oxygen Matters in Shrimp Farming
Shrimp require sufficient oxygen for respiration, feeding and growth. Oxygen is also consumed by:
Other aquatic organisms
Algae during the night
Bacteria
Decomposing organic matter
Uneaten feed
Shrimp waste
Pond-bottom sludge
As stocking density and shrimp biomass increase, oxygen demand may rise considerably. A pond that was stable during the early production stage may require more aeration later in the cycle.
Warning Signs That Require DO Testing
Operators should check dissolved oxygen when they observe:
Shrimp gathering near the pond edge
Shrimp moving toward shallow water
Reduced feeding response
Uneven shrimp distribution
Weak or unusual movement
Increased mortality
Strong pond odour
Excessive organic matter
Poor water circulation
Aerators not performing normally
These symptoms may have several causes. Measuring dissolved oxygen helps determine whether low oxygen is contributing to the problem.
Qiwei JPB-70A Main Specifications
Dissolved oxygen range: 0.0–19.9 mg/L
Resolution: 0.1 mg/L
Basic DO accuracy: approximately ±0.3 mg/L
Temperature range: 0–40°C
Automatic temperature compensation
Polarographic membrane-type dissolved oxygen electrode
Portable handheld display
Suitable for routine on-site testing
Displays dissolved oxygen and water temperature
The external electrode can be lowered into the pond while the operator reads the result from the handheld unit.
When Should Shrimp Ponds Be Tested?
Before Sunrise
Dissolved oxygen is commonly lowest during the early morning because algae and microorganisms consume oxygen throughout the night.
Before Feeding
Checking DO before feeding helps the operator decide whether pond conditions are suitable.
After Feeding
Feed and biological activity may affect oxygen demand. Monitoring can help identify changes during heavy feeding periods.
During Cloudy Weather
Reduced sunlight may decrease oxygen production by algae during the day.
After Heavy Rain
Rain may change water temperature, pond stratification and water-quality conditions.
When Aerators Are Adjusted
Measure before and after changing aerator operation to evaluate the response.
During the Later Growth Stage
Larger shrimp biomass, increased feed and additional waste can raise oxygen demand.
Test More Than One Pond Location
DO concentration may vary across the pond. Testing only beside an operating aerator can produce a result that does not represent other areas.
Recommended measurement points include:
Near the pond centre
Close to the aerator
Away from the aerator
Near feeding areas
At the water inlet
Near the outlet
At different depths
Areas with suspected sludge accumulation
Keep the measurement time, location and depth consistent when comparing daily results.
Correct Measurement Method
Inspect the probe membrane for dirt, wrinkles or damage.
Switch on the JPB-70A and allow the electrode to prepare.
Lower the probe to the required depth.
Move it gently to maintain water flow across the membrane.
Keep it away from pond mud and large air bubbles.
Wait for the displayed value to stabilise.
Record the DO value and water temperature.
Repeat the measurement at other locations.
Rinse the probe with clean water after use.
The polarographic sensor requires movement across the membrane. Holding it in completely still water may cause a slow or decreasing reading.
How Aerators Affect DO Measurements
A high reading directly beside an aerator does not mean that oxygen is distributed evenly throughout the pond.
When evaluating aerator performance:
Measure close to the aerator
Measure farther away
Check the opposite side of the pond
Compare surface and deeper readings
Repeat after a consistent operating period
Record which aerators were running
This helps identify possible low-oxygen areas and weak water circulation.
Do Not Depend on DO Alone
Shrimp health and pond stability may also be affected by:
pH
Water temperature
Salinity
Ammonia
Nitrite
Alkalinity
Turbidity
Organic waste
Disease
Stocking density
A normal DO result does not rule out other water-quality problems. The JPB-70A should be used as part of a broader monitoring programme.
Freshwater and Salinity Considerations
The JPB-70A is suitable for general routine DO measurements. However, customers working with brackish water or higher salinity should confirm whether their measurement procedure requires salinity compensation.
For higher-accuracy marine or brackish-water applications, a DO meter with adjustable salinity and barometric-pressure compensation may be more appropriate.
MTM Precision can assist in comparing the application requirements before model selection.
Probe Maintenance at Shrimp Farms
Shrimp-pond water can quickly coat the membrane with algae, feed residue and organic material.
After measurement:
Rinse the probe immediately
Do not allow pond residue to dry on the membrane
Remove soft contamination carefully
Never scrape the membrane
Check for trapped air bubbles
Inspect the electrolyte
Replace damaged membrane components
Calibrate after electrode maintenance
Keeping spare membrane parts and electrode solution available can reduce downtime.
Who Should Choose the JPB-70A?
The Qiwei JPB-70A is suitable for:
Shrimp farmers
Aquaculture technicians
Hatchery operators
Pond-management contractors
Fisheries training centres
Agricultural colleges
Routine water-quality field teams
For continuous monitoring, remote alarms or automatic aerator control, an online dissolved oxygen system should be considered.
Buy Qiwei JPB-70A for Shrimp Farming in Malaysia
The Qiwei JPB-70A Portable Dissolved Oxygen Meter is available from MTM Precision in Malaysia.
We support aquaculture customers across Johor, Selangor, Penang, Perak, Pahang, Kedah, Kelantan, Terengganu, Sabah and Sarawak.
Contact us to confirm stock, pricing, accessories and suitability for freshwater or shrimp-farming 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 and availability for shrimp farming in Malaysia.
18 Sep 2026
