GroStar GS1 pH Pen LED Lighting The 4RS-1 must be installed

The 4RS-1 must be installed with a 120/240 volt power circuit (up to 50-amps @ 240vac)

It measures up to 10

Stealth-RO150™ with upgraded KDF 85 filter

High Efficiency Electronic Ballast

Premium 95% European aluminum

GroStar GS1 pH Pen LED Lighting The 4RS-1 must be installedIncludes: pH 7 & pH4 calibration solution (50ml bottle each), KCL storage solution (10ml bottle), lanyard and user manual Measures pH and temperature Premium probe technologies and materials ensure high accuracy and durability with minimal maintenance Easy to use design and fast calibration adjustment Double junction replaceable probe, so you dont have to discard the entire pen when the probe reaches its end of life Large 3 color backlit screen gives