TR-HS series waterproof pocket pH tester include three  models (TR-HS10, 20, 30), The meters are used to  measure acidity and alkalinity of liquids. 

Hold Function:
When measure the sample solution, you need freeze reading temporarily for easy viewing. Waiting for a stable reading, press HOLD key, then the meter will freeze the value. 

Automatic Temperature Compensation:
TR-HS30 with temperature sensor, you can view temperature value through temperature key. The meter with automatic temperature compensation for accurate reading under changing conditions. 

Replaceable Electrode:
The life of electrode is about one year due to its chemical properties, it will influence measurement accuracy if using more than one year. The meter with double junction sensor, you can replace it easily.

Auto-Power Off:
TR-HS series will turn itself off approximately 8 minutes after last key pressed, it saves battery power after non-use.

Waterproof Function:
The meter with good waterproof performance, It can float on water.

2 Points Push-Button Calibration:
TR-HS series with 2 points calibration function, it will prompt pH calibration point when you calibrate the meter.
You need only immerse the pH electrode into standard buffer solution and press ENTER key, then the meter will be calibrated automatically.

What's included:
Meter, pH buffer, Alkaline button cell batteries.

What's included: 
Meter, pH buffer, Alkaline button cell batteries.