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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.

✅ 【Wide Measurement Range】The main unit measuring range is: -328~2501℉(-200~1372℃).
Range of K type thermocouple(Stainless Steel):-58~1292℉(-50~700°C).
Bead-type thermocouple(blue):-4~392℉(-20~200°C).
✅【Multi-Functional】: HD large screen display, ℉/℃ and K/J switchable, Max/Min/Average, Data Hold, Auto power-off function(can be cancelled manually).
✅【Differential Temperature】Long press T1-T2 or T2-T1, and find the difference temperature value between T1&T2 testing samples easily..
✅【Hi/Low Flash Alarm】Manually set the upper and lower alarm thresholds. The red backlight of the screen will flash when the testing value is higher or lower than the set thresholds..
✅【ADJ compensation】Long press Hi and Low button together, adjust the ADJ compensation value to complete the calibration procedure, ADJ compensation range: -9~9℃..

AUTO CALIBRATION: The PH meter has an auto temprature compensation feature that adjusts to water temperatures and water quality to give pH readings almost instantly. As well, you can calibrate the tester with one touch button using Buffer Powder..
FAST AND HIGH ACCURACY: Our Digital PH Meter can ensure your pool, general hydroponics ph or even drinking water has a perfect pH balance and safe for use with Tester precision pH accuracy. Tester has a sensitive electrode sensor to read accurate pH levels. The included detailed manual will show you how to get the best accurate and stable reading..
AUTOMATIC TEMPERATURE COMPENSATION: No more need to take care about the temperature of testing liquid, as ph meter has built in (ATC) automatic temperature compensation, so that it can accurately determine pH value of the sample at any temperature in a range of 0 DegreeC - 80 DegreeC (32 DegreeF - 176 DegreeF)..
WIDE USE: Pocket Size PH Meter is the ideal test kit for home and laboratory uses.Suitable for testing the pH of drinking water, swimming pools, aquariums, reverse osmosis systems, spas or hydroponics.
ideal for testing water, swimming pools, aquariums, spas, hydroponics, food, wine and beer, etc..
MAKE YOU SATISFIED WITH THE PRODUCTS: Come with 1x PH meter, ....

It will come with Camera, Manual and hand strap. Requires 2 AA (NO Batteries included).

This Certified Refurbished product is tested and certified to look and work like new. The refurbishing process includes functionality testing, basic cleaning, inspection, and repackaging. The product comes with a 90-day warranty, and may arrive in a generic box. Only select sellers who maintain a high performance bar may offer Certified Refurbished products on Amazon.com.

APPLICABLE OCCASIONS: Suitable for power systems with rated isolation voltage up to 690V and circuit 50-60hz..
PRODUCT FUNCTION: This relay can be used as an overload protection for long-term or indirect long-term maintenance of the motor..
FUNCTION: This relay is used for protecting the phase break when the electric motor is overload..
VERSATILE: The relay has different mechanism and temperature compensation..
EASY TO OPERATE: With phase break protection, manual and automatic reset, temperature compensation, trip indication, test button and stop button..

EYE RELIEF: 2.7 inch. 4x Magnification. 20mm Objective Lens..
Non-Illuminated Scope. BDC Bullet Drop Compensation Turret..
Waterproof & Fogproof. Crystal clear multi-coated lens and HD glass for maximum light transmission..
Features a built-in bullet drop compensation system calibrated to 500 yards in 100 yards increments..