Precision DO30 Pen-Style Dissolved Oxygen Meter & pH Tester

Ultra-Portable Design
– Pocket-sized pen shape with lightweight ABS housing for on-the-go water testing in labs, aquaculture, or outdoor fieldwork.
Dual-Function Accuracy
– Measures dissolved oxygen (0–20 mg/L ±0.3) and pH (0–14 ±0.1) with a reliable electrochemical sensor and glass electrode.
Quick-Calibration Tech
– One-touch calibration using included buffer solutions for instant readiness; auto-temperature compensation (0–50°C).
Robust Build
– IP65-rated waterproof casing and replaceable sensor cap extend lifespan in harsh environments like ponds or industrial wastewater.
Clear LCD Display
– Backlit screen shows real-time readings with hold function; powered by 2x AAA batteries (included).
Versatile Use
– Ideal for hydroponics, breweries, swimming pools, or environmental monitoring—ensures water safety anywhere.
Bulk Order Advantage
– Wholesale pricing for farms, research teams, or suppliers needing high-volume precision tools.