Digital Dissolved Oxygen Meter 0.0-40.0 Mg/L Waterproof ATC 0.0-300.0% DO Tester DO9100 Water Quality Oxygen Detector

Battery Included : No High-concerned chemical : None Is Smart Device : No Model Number : DO9100 With Backlight Or Not : Yes Display Type : DIGITAL Brand Name : JUANJUAN Origin : Mainland China Certification : CE Oxygen concentration : 0.0-40. 0 mg/L Dissolved oxygen saturation : 0.0-300. 0% Temperature : 0-40°C;32-104°F Backlight : backlight is optional Battery power : low battery warning Power supply mode : 3*1. 5V button battery (not included)