Precision DO Testing for Aquariums & Tap Water

Durable pen-style design with high-sensitivity electrochemical sensor for 0-20mg/L dissolved oxygen measurement. Features automatic temperature compensation (0-45°C) and ±0.3mg/L accuracy. IP67 waterproof housing with scratch-resistant ABS casing.

One-Button Calibration & Auto-Shutoff

Single-point calibration via saturated air method, backed by 8-minute auto power-off to conserve battery. Includes replaceable DO membrane cap and 3V CR2032 lithium battery.

Multi-Scene Professional Use

Ideal for freshwater aquariums, hydroponics, wastewater treatment, and lab research. Measures both slow-moving and aerated water with 0.01mg/L resolution. Ships with protective carrying case and calibration solution.

Bulk Purchase Advantage

Wholesale-ready packaging with 50 units per master carton. CE/RoHS certified. Compatible with reef tanks, koi ponds, and aquaculture systems.