$1200

Hach DR 900 Multiparameter Colorimeter 9385160

$26.33

3M KCL Storage Soaking Solution (8 Oz.) for Ph and ORP Electrodes

$197.44

/Testo 205 PH Meter Tester measuring instrument probe head for food 0563 2051

$105

Thermo Scientific Orion 9106BNWP Gel-Filled Combination pH electrode ( 7029)

$272.98

Acidity Meter PHS-25/3C Bench-top Digital Display Acidity Meter Laboratory PH

$295.95

Milwaukee MW802 PRO 3-in-1 pH, EC, TDS Combo Meter with ATC

$47.48

52-730-005-0, Chemical Etching Pen for Metal

$300

THERMO ORION 145A+ BASIC CONDUCTIVITY METER & PROBE FOR THERMO ELECTRON CO. USA

$30

IoT pH meter for ESP8266, Raspberry Pi & Arduino; ATC; MQTT;aquaruim, beer, wine

$440

Digital Conductivity Meter with Conductivity Solution TDS Range 0.00μS/cm～200mS

$99

YSI Incorporated 3403 Conductivity Cell, K=1.0/cm SN:01G0505 See Pics

$235

+Oakton PH 11 Meter Kit Model: 35614-80*AS IS IN PICTURE*