$270

DeltaOhm DO-97766T-R1 Dual Digit Conductivity Indicator without Probe.

$37.5

^^ THERMO ORION 250 250A METER (QFT71)

$2500

New OEM Mettler Toledo pH Meter SevenDirect SD20 Viscous Kit 30671560 Fast Ship

$145

Digital Conductivity Meter with Accuracy Electric Meter +1.0%FS Matching +1.5%FS

$120

Bante Portable Conductivity Meter Water Tester Temp Meter TDS Tester 520 Plus

$263.12

PH Value Tester Portable PH Meter Acidity Test Detector Food Acidity Meter

$97.64

ENDRESS+HAUSER CPK9-NAA9B TERMINATED pH MEASURING DIGITAL ELECTRODE

$500

1PC USED Hach DR300 Chlorine Colorimeter Meter

$77.95

Milwaukee EC59 PRO 3-in-1 Conductivity / TDS / Temp Tester for Aquaculture

$420

Milton Roy Liquitron DC4500 120V CONDUCTIVITY CONTROLLER -- Great Condition!!!!!

$41.24

APERA INSTRUMENTS 201-C Combination pH Electrode, BNC Connector,

$173.34

1 pcs Rear Shell/ Back Cover for HACH DR900 Multiparameter--sss