$225

Fisher Scientific Accumet Research AR15 pH Meter

$558.46

Portable Conductivity Meter Handheld Conductivity and Resistivity Meter

$113.44

REED INSTRUMENTS R3500-KIT / R3500KIT (BRAND NEW)

$500

WTW-SenTix NH500/2 ISE Measurement with Combined Electrodes of the 800 series

$410.79

One New HACH RC1R5N PH Electrode

$210

Digital PH Controller Meter with Range 0~14pH Resolution 0.01pH for for Sewage

$15.29

HACH 5500sc PO 3/4-LR cover for front analyzer board with screws

$202.5

Thermo Scientific ORION STAR A121 Portable PH Meter /267003-AO1Stara1210(LMP19F)

$210

Industrial Online PH Controller Meter Tester with Range 0~14pH Accuracy ±0.02pH

$2.99

1PCS Portable Pen Digital TDS Meter Filter Measuring Water Quality Purity Tester

$50

Cole-Parmer ~ Digisense Model No. 5986-00 pH Meter ~ With Case and Extras

$102.26

, LLC-AI1312 201T-S pH/Temp. Electrode, 8-pin Connector, The Electrode for Ap...