LUTRON PSA-311
Features:
Measurement : 0 to 12.0 % salt ( % weight value )
Automatic temperature compensation.
Meter build test probe, all in 1, easy operation.
Hold, Record ( max., min. ) .
IP-65 Water resistance, heavy duty.
DC 1.5V battery ( UM-4, AAA ) x 4. ΓΏ