Specification : 

• MODEL : AD-11 AD-12
• Range PH -2.0 to 16.0 -2.00 to 16.00
• Temp -5.0’ C to 60.0’ C -5.0’ C to 60.0’ C
• Resolution PH + / - 0.1 + / - 0.01
• Temp 0.1’ C 0.1’ C
• Accuracy PH + / - 0.1 + / - 0.01
• Temp + / - 0.5’ C + / - 0.5’ C
• Calibration 1 or 2 points
• Temp Compensation Automatic from -5 to 60’ C
• Environment -5 to 50’ C , Max RH 100% 
• Battery 4 x 1.5 V ( 300 hours of use )

AD11 and AD12 are the most advanced microprocessor based IP67 Waterproof pH/ Temp pocket testers in the market. Fast, stable and precise, these testers are for users that require the greatest accuracy. Simple user-replaceable pH/ Temp probe: just unscrew the plastic ring on the top of the electrode and replace it with a new one!  2 rows display LCD ( reads both pH and temperature measurements) and built-in HOLD function that freezes the display for easy and accurate recording. Other features such as stability indicator, automatic calibration and automatic temperature compensation make these waterproof pocket testers a must-have in a variety of industries. The modular design allows to replace the electrode in a fast and simple way.