The Ohaus ST10 pH meter pen is a compact and easy-to-use tool for measuring pH levels. With its measurement range of 0.00 – 14 pH and an accuracy of ±0.1 pH, it delivers precise and accurate results. The pen features an LCD display, and with its simple one-button operation, it is easy to use. The pen is designed to last with a durable waterproof housing and a protective sensor cap, making it suitable for rough environments. The automatic shutdown feature preserves battery life, with a battery life of 200 hours with disposable batteries. The pen is lightweight and portable, with a wrist strap for easy handling. The device is perfect for scientists, researchers and technicians who need accurate pH measurements in the field or in the lab. It’s measurement resolution is 0.1 pH and comes with 4 AG13 batteries included. It is IP67 protection rated and can be used in working environments of 50°F – 104°F, 85%RH, non-condensing (10°C – 40°C, 85% RH, non-condensing).