Apera Instruments AI223 SX620 pH Pen Tester, (0.01 pH) 3-Point Auto

Features:

• The smallest pH pen with a 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 Temperature
• A 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