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GISNPA Dissolved Oxygen Meter
GISNPA Dissolved Oxygen Meter excels in accurately measuring dissolved oxygen and temperature across various environments, including aquariums, swimming pools, ponds, aquaculture, research, and more.
LCD Backlight Display
Adopts the digital screen display with backlight, which is more clear and convenient to read data.
Dissolved Oxygen Range
Effortlessly test values within the 0.0-40.0 mg/L range.
How to know if aquatic environments have enough dissolved oxygen (DO)?
Freshwater Aquaculture: Suitable dissolved oxygen concentration: Usually maintained at 5-8 mg/L.
Seawater Aquaculture: Suitable dissolved oxygen concentration: usually maintained at 5-10 mg/L.
Measure and calibrate effortlessly without the need to remove the protective cover from the electrode.
Calibration Steps for Dissolved Oxygen Meter
E
Reviewed in the United States on February 25, 2025
Stopped working after about 3 months
Spencer
Reviewed in the United States on January 2, 2025
I got this for some upcoming aquaponics projects as I wanted to get more accurate results measuring the water for a range of things, including dissolved oxygen. The unit was pretty straightforward to use, and I honestly am not sure how accurate it is but it seems like the readings are fine. No complaints here
Koji
Reviewed in the United States on September 30, 2024
OK, as many people says, the manual is somewhat incomplete with errors. But assembling the tool can be accomplished with this manual. 100% calibration is easy. 0% calibration is confusing as the manual says to use 30mL distilled water but the packet has big "250-mL" sticker. It's up to you if you want to use 30-mL or 250-mL but since the purpose of using it is to deplete oxygen in the solution, I would use 30-mL.Once I dip the probe in the water I want to measure DO, the reading will continue to go down almost endlessly (gradually slows down). There is no explanation on how to measure DO in the manual. Am I supposed to use the reading when the number is somewhat stable? Or do I have to wait until it completely stops? How much water/solution am I supposed to use for measurement? Those I guess I have to figure out myself.Other thing I noticed was 6 membranes that came in the package was bit dirty and also has wrinkles. I am not sure how much this will affect the reading. I have washed them with distill water and air-dried. I think wiping with paper towel etc. will scratch the membrane and cause erroneous readings.Anyway, assuming I am using it correctly, measuring DO was easy. The first recorded numbers seemed reasonable. I will continue to use it and see!+++After 1 week of use, I found the temperature is off all the time. I used two other thermometers and found this one to be about -0.2 to -4.8 degrees off. I don't know how the thermometer works on this tool and I don't think there is a way to calibrate it... As the temperature affects the DO reading, regret to say I think this device is unreliable. I'm still using it just to see ups & downs of DO.
MoYeniRo
Reviewed in the United States on February 27, 2024
The GISNPA Dissolved Oxygen Meter offers a convenient and reliable solution for measuring dissolved oxygen (DO) levels in various aqueous environments, particularly for aquatic life enthusiasts. Here's a breakdown of its key features and potential benefits:Pros:• Extended measurement range: Measures a wider range of DO (0-40.0 mg/L) compared to the standard range found in many meters, making it suitable for diverse applications.• User-friendly design: Allows for measurement and calibration without removing the electrode cover, simplifying the process.• Automatic temperature compensation (ATC): Ensures accurate readings across a temperature range of 0-50°C, eliminating the need for manual adjustments.• Clear display: The LCD screen with backlight provides easy visibility in various lighting conditions.• Auto power-off and low battery indicator: Promote efficient battery usage and timely device maintenance.• Comprehensive kit: Includes essentials like calibration powder and protective covers for extended use and reliable performance.• Wide range of applications: Suitable for monitoring DO levels in aquariums, swimming pools, ponds, aquaculture facilities, and various research settings.
Gary Ryan
Reviewed in the United States on February 25, 2024
This product has a some weighty feel to the probe and meter, this is a characteristic that is typically associated with a quality product, the probe has a 3 foot reach to it. This kit contains calibration solution, extra probe caps and a testing vial. This product is powered by 3 button cell batteries inside the top cap of the meter which ensures a long lifespan for this device with no worries from a rechargeable battery running flat and not maintaining a charge.Product Dimensions. (Meter) 6.25" Tall x 1.5" Wide x 1.5" Depth. (Probe) 6.25" Tall x 1" Wide x 1" Depth.This product is an affordable solution for home use, this product comes in considerably cheaper than most alternatives in price, this product provides a comprehensive understanding of a fish aquariums toxicity which could lead to increased microbial growth, this meter provides a helpful response to monitoring environments for breeding enclosures and issues that can effect climate sensitive fish.
Lisa T
Reviewed in the United States on December 21, 2024
Entire wand must be immersed to accurately capture temperature of specimen. Will not return correct DO results if not fully into sample.
Jonathan
Reviewed in Mexico on October 20, 2024
El producto llego un día antes de lo esperado, que fue excelente porque ya lo necesitabamos. El equipo funciona bien y es fácil de manejar.
Jeanne Kaidy
Reviewed in the United States on October 17, 2024
These instructions are obviously translated very badly from another language. I am still struggling to figure out how to calibrate with the anoxic solution to zero.
pgraNTX
Reviewed in the United States on April 14, 2024
I got this to check the water in my nearby Lake and also the water I been producing in my home distiller (before and after distillation). Difficult to follow instructions but much help thanks to another reviewer. They provide a small amount of sodium sulphite powder to absorb residual oxygen to make a known blank. But fortunately sodium sulfite is cheap and easily available; don't bother trying to make your own by burning sulfur to get sulfur dioxide because you get some sulfur trioxide (becomes sulfuric acid) as a byproduct.Depending upon your need for dissolved oxygen measuring range available and exactness (accuracy) and repeatability (precision) you may need more than this starting type system but for cost this is entirely reasonable; the higher-level instruments cost many thousands of dollars.In conclusion: recommend. This may be all you need for your application(s) or help you understand some of the problems of measuring and help decide if you need more.
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