PH-901 Pen pH Testr WP Range: 0.00—14.00 pH, Resolution: 0.01 pH, Accuracy: ≤±0.03 pH, Temp. C: 5—50℃, (ATC) Calibration: Two-point at 6.86pH and 4.01pH (or 7.0pH and 4.01pH) Features: Automatic switch-off function: After 10 minutes without pushing buttons, the meter will be switched off automatically. Low battery：As long as there is any display, the accuracy is guaranteed. Battery Life: DC 4x 1.5V Flug: Fixed electrode

ZD Instrument Co. (Jiangyan ZhengDa Scientific Education Instrument & Equipment Factory) is a speciallized manufacturer of electro-chemistry instruments. Our main products are pH meters, Soil PH & Moisture Meter, conductivity meters, "Nutra Wand" conductivity meters, mini TDS meters, salinity meters, Continuous reading PH/Conductivity/Temperatre monitors. pH combined electrodes, skin electrodes, Dissolved Oxygen (DO) electrodes, Conductivity and ORP electrodes. Bearing in our mind that our customers need most reliable instruments, we have always been doing our utmost to supply quality products in our years of history. Most of our products are CE certificated and are sold to all the continents in the world. With the effecient efforts of our R&D team, new products are coming out all the time.

Latest News: From the beginning of year 2007, we are proud to introduce the new range of waterproof meters,including pH,ORP,conductivity,TDS,Salinity, Nutrient-Wand Precision Digital TDS Tester and new Soil pH & Moisture Tester, pH/TDS/EC/Temp Combined Monitor,Controller,Nutrient-Wand Precision Digital TDS Teter,pH/opr Transmitter,etc.

For the detail specification of our products, you can find them at our New web site www.zdinstrument.com Should you need any further information, please feel free to contact me directly.