Pen Meter ST10S - 30073982 Small, economical pen meters offer simple, fast, and straightforward operation. With durable IP67 waterproof ABS housing, protective sensor cap, and an automatic shutdown feature that preserves battery life, OHAUS pen meters can endure consistent use in rough, wet environments. Equipped with a wrist strap to prevent accidental drop and damage. Family Tag Line: Compact Design for Fast, Convenient Electrochemistry Measurement At Your Fingertips Family Name: Starter Pen Meters Display: Liquid crystal display (LCD) display with secondary information line (on select models) Applications: pH, oxidation-reduction potential (ORP), conductivity, dissolved oxygen (DO), salinity, total dissolved solids (TDS), temperature measurement Construction: ABS Housing Design Features: Easily replaceable electrodes, automatic shut off feature Communication: N/A Family Overview: After more than a century of perfecting the art of measurement through our durable weighing products, OHAUS precision is now available in a line of pen meters that provide accurate measurement of pH, oxidation-reduction potential (ORP), conductivity, salinity, and total dissolved solids (TDS). Starter pen meters are the economical option when you are simply looking for meters that will provide accurate measurement without restriction. Operation: 4 1.5V batteries (included) Model No.: ST10S Measurement Range: 0.0 – 10.0 ppt Measurement Resolution: 0.1 ppt Accuracy ± (mV): Display: LCD Working Environment: 50°F – 104°F, 85%RH, non-condensing (10°C – 40°C, 85% RH, non-condensing) Net Weight: 3.88 oz (110 g) pH accuracy (±): Dimensions: 1.5 in x 7.28 in x 1.77 in (38 mm x 185 mm x 45 mm) (LxHxW) Accuracy ± (Temperature): Parameter: Accuracy: ±2.5% FS Power: 4 AG13 Batteries (Included)