From the product description, check product page for current description, price and availability:

• 1. Conveniently fits in your pocket or bag and goes anywhere. This product is suitable for families and laboratory testing pH value, including domestic drinking water, aquariums, swimming pools, water, reverse osmosis systems, hydroponics, hydrotherapy.
• 2. Large-screen liquid crystal display, double size of an ordinary LCD PH pen, easy clear and intuitive to read with high precision 0.01, long standby.
• 3. ATC Function: Automatic Temperature Compensation accounts for changes in temperature automatically; Full measurement range of pH 0-14, 0.01 pH resolution.
• 4. Automatic calibration,fast and accurate results.And when the product with problems,users can make calibration to get problem solved.the Included Detailed Manual Will Show You How to Get the Best Accurate and Stable Reading

From the product description, check product page for current description, price and availability:

• The smallest pH pen with reliable testing performance for regular liquid e.g. pools, hydroponics, aquaculture, cooling towers, beverage making, body fluid, etc
• ±0.01 pH accuracy; Automatic 3-point calibration; 0-60˚C Automatic Temp. Compensation
• Slim replaceable probe, suitable for test tubes
• Intelligent functions: switch from ˚F to ˚C, automatic power-off, pH probe invalidation reminder (remind you to replace the probe for better performance)
• Complete kit: 3 types of premixed calibration solutions (4, 7, 10) and storage solution (3M KCL) all in one portable case

From the product description, check product page for current description, price and availability:

• Built-in automatic temperature compensation system: no need to worry about measuring the temperature of the liquid, this PH meter has built-in automatic temperature compensation system (ATC)
• Simpler operation, easy to use: press the ON/OFF button to turn on the pH meter, immerse the front end of the pH meter in the test liquid, and get the PH reading immediately
• Higher accuracy, faster measurement speed: the glass electrode on the front of the pH meter allows you to get higher precision readings at faster speeds
• Compact and lightweight, it’s easy to carry: it’s only 15.5*3*2mm and weighs only 46g. It fits in your pocket and handbag
• IDEAL FOR ANY HOUSEHOLD—You can use this small, but powerful, device to measure your aquarium, pool, pond in a garden, bath tub to test the levels of alkalinity in your drinking water, urine, RO System, spa, soap mixtures, food, wine, beer or any other liquids.

From the product description, check product page for current description, price and availability:

• 1. Conveniently fits in your pocket or bag and goes anywhere. This product is suitable for families and laboratory testing pH value, including domestic drinking water, aquariums, swimming pools, water, reverse osmosis systems, hydroponics, hydrotherapy.
• 2. Large-screen liquid crystal display, double size of an ordinary LCD PH pen, easy clear and intuitive to read with high precision 0.01, long standby.
• 3. ATC Function: Automatic Temperature Compensation accounts for changes in temperature automatically; Full measurement range of pH 0-14, 0.01 pH resolution.
• 4. Automatic calibration,fast and accurate results.And when the product with problems,users can make calibration to get problem solved.the Included Detailed Manual Will Show You How to Get the Best Accurate and Stable Reading

From the product description, check product page for current description, price and availability:

• The smallest pH pen with reliable testing performance for regular liquid e.g. pools, hydroponics, aquaculture, cooling towers, beverage making, body fluid, etc
• ±0.01 pH accuracy; Automatic 3-point calibration; 0-60˚C Automatic Temp. Compensation
• Slim replaceable probe, suitable for test tubes
• Intelligent functions: switch from ˚F to ˚C, automatic power-off, pH probe invalidation reminder (remind you to replace the probe for better performance)
• Complete kit: 3 types of premixed calibration solutions (4, 7, 10) and storage solution (3M KCL) all in one portable case

From the product description, check product page for current description, price and availability:

• The smallest pH pen with reliable testing performance for regular liquid e.g. pools, hydroponics, aquaculture, cooling towers, beverage making, body fluid, etc
• ±0.01 pH accuracy; Automatic 3-point calibration; 0-60˚C Automatic Temp. Compensation
• Slim replaceable probe, suitable for test tubes
• Intelligent functions: switch from ˚F to ˚C, automatic power-off, pH probe invalidation reminder (remind you to replace the probe for better performance)
• Complete kit: 3 types of premixed calibration solutions (4, 7, 10) and storage solution (3M KCL) all in one portable case