Dissolved oxygen pen meter for fishing water NPT-DO601Y  pocket Dissolved Oxygen tester
Features:

• Measuring range:Dissolved Oxygen 0~20mg/L,Temperature 0~60℃
• LED segment code liquid crystal display (dissolved oxygen value and temperature value)²
• Numerical calibration and temperature calibration function
• Using 32-bit high-performance processor, high stability, low power consumption
• Automatically identify the standard solution, if the wrong standard solution is used, the calibration cannot be completed
• Automatic shutdown after five minutes without key operation
• Low battery reminder function
• Long standby technology, theoretical standby time is more than one year
• Protection grade:IP65