Best Marine Salinity Meter

Extech DO700 Portable Dissolved Oxygen Meter

Measures dissolved oxygen concentration/saturation, pH, mV, conductivity, TDS, salinity, resistivity and temperature.
Automatic salinity compensation and manual barometric pressure compensation for DO measurements.
One button pH calibration (4, 7, and 10pH).
Choice of 3 point pH calibration for better accuracy.

If the specific gravity between 1.020-1.023,show that the specific gravity is nomal..
Designed with an automatic level function,can automatically identify the level to avoid errors..
The easy-to-read swing-arm pointer and extra wide stable base provide an accurate test result..
Fit for brackish and marine aquariums. Perfect for testing both salinity and specific gravity of your brackish and marine tank..
The outside rang of scale indicates salinity(PPT). The inside range of scale indicates gravity. And with safe zone clearly indicated..

Dual Scale: this aquariums reqrium measures saltwater soultion and provides readings of 0-100PPT parts per thousand, Specific gravity 1.000 to....
Widely Use: Saline meter is ideal for aquarium marine fish-keeping, saltwater pool, agricultural, gardening and lab education purposes.
Accurate Refractometer: Saltwater tester can automatically compensate temperatue when the ambient temp changes, which allows the refractometer....
Simple to Use: salinity refractometer is easy to operate only 2-3 drops of sample solution after calibration, you can get the accurate reading through....
Durable & Portable: This saltwater meters are made of aluminum material, non-staining, anti-rusty and sturdy design, compact in size and lightweight,....

[5-in-1 pH METER] - Meter has a five-in-one function, which can measure PH, TDS, EC (Electrical Conductivity), Salinity %, Salinity ppm, and....
[Accurate pH Tester] - Featuring a solid glass probe, you can get a full measurement range of 0-14pH, 0.01 pH resolution. The pH meter uses a 3-point....
[TDS Measurement] - Fast and accurate TDS / PPM testing for hydroponics or anywhere TDS is critical. The TDS Range is 0~10,000ppm. Accuracy is ±2%..
[EC Measurement] - Measure Electrical Conductivity of either fresh or salt water..
[Saline % and Saline ppm Measurement] - Conveniently and easily keep track of saline levels by either percentage or ppm. Great for aquarium, saltwater....

Auxiliary tool for salt chlorinator: This salinity tester is specially designed for salt water pool with salt chlorinator generator. It can help to detect the salt level of the salt water pool and ensure the normal operation of the machine. The salt level in the ideal range is 2700ppm to 3400ppm..
Application: This salt tester can be used in saltwater pool, swimming pool, koi fish pond and spa. With this tester, save a trip to the pool store. It is not suitable for sea, marine, salt Water fish tank or food..
Dual color backlit design: Backlight design guarantees that reading the result can in low light or dark environment. And it has a prompt for the color change of the display, if the salt level is lower than 2700ppm or higher than 3400ppm, the screen will display red. This function can remind that the salt water pool is in an abnormal situation and taking corresponding measures in time is essential..
Multifunction: Its function has SALT, EC and TEMP. Salt range: 0-9999ppm. EC range: 0-9999μs/cm & 10.0-19.9ms/cm. EC function general uses for hydroponic system and indoor plant grow..

...tion is still inaccurate, and the membrane sleeve needs to be replaced..
Adopts the digital screen display with backlight, which is more clear and convenient to read data. Auto power-off in 8 minutes if not using it. Low battery indication. Oxygen solubility will be affected by temperature, atmospheric pressure, and salinity. Our instrument with temperature compensation can meet normal use..
It is very suitable for measuring the dissolved oxygen level and temperature in a wide range of aquariums, swimming pools, ponds, freshwater aquaculture, marine aquaculture, school teaching experiments, laboratory sterile environment, aquaculture, scientific research, and other fields..

※ LARGE LCD DISPLAY: pH, ORP, Conductivity, TDS, Salinity and Temperature simultaneously. Displays Maximum/Minimum value and data hold..
※ Automatic Temperature Compensation (ATC) and degree ℃/℉ switchable..
※ Waterproof IP-57 standard and rugged design for field use conveniently. It can float on water..
※ Simple to calibrate by one keyboard. Low battery and consumption indicator. Auto shut off after 10 minutes of non use..
※ APPLICATION: Wide range of performing multifunctional testing on pH, ORP(mV), Conductivity(us), TDS(ppm), Salinity(ppm) and Temperature with a replaceable electrode. Note: This meter has ORP(mV) testing function..

Auto ranging TDS tracer meter offers 3 ranges to measure pure water to salinity solutions using the same conductivity cell.
Instructions included for measuring TDS in soil.
Feature memory stores and recalls 15 readings, data hold, auto shut-off and low battery indication.
Simultaneous display of conductivity or TDS and temperature.
Complete with meter and conductivity cell, protective sensor cap and neck strap.

Equipped with state-of-the-art Optical DO sensor: measures dissolved oxygen level in a RELIABLE and EFFORTLESS manner.
Minimal maintenance required. Quick and easy calibration.
Automatic compensation for salinity, temperature& air pressure.
Glp data management, 500 groups of data storage, usb data output.
Comes with a complete test kit, including the meter, 10ft optical probe and salinity probe, a calibration cap, and a rugged carrying case.