Great econimal tester for the greenhouse operator.
This tester includes features such as:
- Water proof and designed to float 
- Replaceable graphite electrode
- Adjustable TDS ratio
- °C or °F measurement
- Automatic temperature compensation (ATC) with adjustable β
- Battery level indicator, stability indicator
- Automatic shut off and automatic calibration
- One year warranty against defects against defects in workmanship and materials when used for their intended purpose and maintained according to instructions.