in Water Quality Tester Pen7 Measure : PH / TDS / EC / ORP / S.G / Sality / Temperature Food salinity measuring range : 0.00-25.00% High-concerned chemical : none Semi-finishedproduct : No Total dissolved solids : (TDS) measrement With Backlight Or Not : Yes seawater salinity measuring range : 10.1-200.0 ppt [7-in-1 water quality meter.Product Highlights Product: 7 in 1 Water Quality Tester Pen Meter for Pools, Drinking Water Aquariums Hydroponic Cooking Water:PH/TDS/EC/ORP/S.G/Salinity Shopping focus: Daily use Choose your option: Confirm the selected size, color, specification and included accessories before ordering. Specifications and CompatibilityCheck the selected product variant, images and listed specifications for fit and compatibility. Features may differ between configurations.Questions Before Ordering Which option should I choose? Match the listed variant to your intended use. What is included? Refer to the chosen variant and product images. Will it fit my device or space? Confirm the specifications before purchase. Is every option identical? Features and included pieces can vary by variant. Where can I find delivery details? Review the shipping information at checkout. Related Products Holdpeak Dissolved Oxygen Meter Do Holdpeak Hp Precision Digital Multimeter Holdpeak Hp Ammonia Gas Detector Holdpeak Hp Ammonia Gas Tester Blood Glucose Meter Glucometer Diabetes Digital Ultrasonic Thickness Gauge Meter Holdpeak Digital Ultrasonic Thickness Gauge