Yantai Dongrun Instrument Co., Ltd.

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1. Waterproof Pen Type Dissolved Oxygen (DO) meter

Waterproof Pen Type Dissolved Oxygen (DO) meter
Main Features
Micro-process Test Pen, high accuracy, good repetition
Polarographic DO Electrode comes with membrane cap constructure
membrane easy replaced, cost down, life-span long
2 points ...

2. Waterproof Pen Type TDS/Salinity Meter

Waterproof Pen Type TDS/Salinity Meter

Main Features
Replaceable and large capacity electrode cost down, life span long
New design, test fast and accurately
Waterproof to IP67
Touchable switch, automatically shutdown
1 year assurance ...

3. Waterproof Pen Type TDS Salinity Meter

4. Waterproof Pen type Conductivity Meter

Waterproof Pen type Conductivity Meter

Main Features
Replaceable and large capacity electrode cost down, life span long
New design, test fast and accurately
Waterproof to IP67 standard So light, it floats
2 points push button calibration
Touc ...

5. Waterproof pen type pH meter

Waterproof pen type pH meter

Main Features
Easy to operate, one hand complete accurate pH measurement
Electrode module replacement, maintenance costs low
A new process design, precise and rapid detection
Waterproof IP67 rating, can float ...