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View item on eBay HANNA HI 99550-01 Infrared Digital Thermometer new	Buy Now!	$144.99
View item on eBay Milwaukee SM100 Smart pH Meter + Probe, SM 100 New	Buy Now!	$71.50
View item on eBay Milwaukee ORP57 Waterproof ORP/Temp Tester, Martini NEW	Buy Now!	$78.75
View item on eBay Hanna pH TESTER METER Aquarium/Hydroponics/Lab HI 98107	Buy Now!	$44.95
View item on eBay NEW! HM Digital TDS Meter 3 Hydroponics, Water Tester	Buy Now!	$22.20
View item on eBay HANNA HI 98130 pH EC TDS Conductivity Tester Meter high	Buy Now!	$124.70
View item on eBay NEW TDS Calibration NaCl Solution 342 ppm Conductivity	Buy Now!	$4.95
View item on eBay Hanna HI 98120 orp meter orp tester with thermometer	Buy Now!	$109.99
View item on eBay HANNA HI 98129 Grochek pH EC TDS Combo Meter Tester low	Buy Now!	$129.00
View item on eBay HANNA HI 98203 SALINTEST Salt Tester HI98203 Water	Buy Now!	$89.25
View item on eBay New HANNA BL 7916 pH Controller + Dosing Pump, BL7916	Buy Now!	$760.99
View item on eBay HANNA HI 98127 pH/Temp Waterproof Tester Meter HI98127	Buy Now!	$69.50
View item on eBay Milwaukee MI404 Free & Chlorine Meter -- Colorimeter	Buy Now!	$160.99
View item on eBay Milwaukee SM600 Dissolved Oxygen Meter, DO/SM 600 New!	Buy Now!	$159.00
View item on eBay DISSOLVED OXYGEN KIT/METER (MILWAUKEE AQ600), NEW	Buy Now!	$215.00
View item on eBay DISSOLVED OXYGEN METER KIT Complete MILWAUKEE AQ600	Buy Now!	$215.90
View item on eBay HANNA HI 98312 DiST®6 EC TDS °C °F Tester Meter HI98312	Buy Now!	$96.99
View item on eBay HM Digital TDS Meter Pocket-Size Tester 0-9990ppm TDS 4	Buy Now!	$21.00
View item on eBay HM Digital TDS Meter Pocket-Size Tester 0-9990ppm TDS 4	Buy Now!	$21.00
View item on eBay HM Digital DM-1 Inline Dual TDS Monitor Tester Meter	Buy Now!	$29.95
View item on eBay Milwaukee C65 Waterproof Conductivity Tester EC meter	Buy Now!	$51.98
View item on eBay Portable Digital Microscope for PC & USB Camera	Buy Now!	$129.00
View item on eBay Portable Digital Microscope for PC & USB Camera	Buy Now!	$129.00
View item on eBay Portable Digital Microscope for PC & USB Camera AM311S	Buy Now!	$185.00
View item on eBay Portable Digital Microscope for PC & USB Camera AM311S	Buy Now!	$185.00
View item on eBay New Digital Thermometer Industry Home Lab Aquarium Pool	Buy Now!	$29.95
View item on eBay HM Digital PH-200 pH/Temp Meter/Tester/Waterproof New	Buy Now!	$79.95
View item on eBay Hanna Waterproof pH/EC/TDS Meter HI 9813-5	Buy Now!	$163.00
View item on eBay New Portable Digital Earscope Otoscope AM311H	Buy Now!	$269.00
View item on eBay Portable Digital Microscope for TV / USB Camera AM412N	Buy Now!	$249.00
View item on eBay Milwaukee MA9010 pH 10.01 Buffer Calibration Solution	Buy Now!	$9.50
View item on eBay Hanna HI 99161 Portable pH Meter for Food Dairy Product	Buy Now!	$330.99
View item on eBay HM Digital TDS Meter Pocket-Size Tester 0-9990ppm TDS 4	Buy Now!	$21.00
View item on eBay Hanna TDS1 water meter tester 999 ppm aquarium pools	Buy Now!	$20.95
View item on eBay New HM Digital EC 3 Handheld Conductivity Tester/ Meter	Buy Now!	$22.20
View item on eBay HANNA HI 9813-6 pH/EC/TDS/Temp Meter/Grochek/HI9813-6	Buy Now!	$164.99
View item on eBay Milwaukee SM401 Low Range TDS/ppm Meter, Water Tester	Buy Now!	$71.50
View item on eBay Professional pH meter auto calibration & temperature	Buy Now!	$305.99
View item on eBay Hanna HI 98201 ORP Tester meter ORP Range ±999 mV	Buy Now!	$89.99
View item on eBay HANNA HI 98128 pH/Temp Waterproof Tester/pHep 5/HI98128	Buy Now!	$79.00
View item on eBay HM Digital AP-1 AquaPro TDS/ºC/ºF PPM Meter Tester	Buy Now!	$25.79
View item on eBay HM Digital AP-2 EC/ºC/ºF Conductivity Meter/Tester/EC 3	Buy Now!	$25.79
View item on eBay HANNA HI 99104 Digital pH Meter/Tester/Checker, HI9910	Buy Now!	$29.99
View item on eBay Hanna HI 98601 Digital Hygrometer for relative humidity	Buy Now!	$102.99
View item on eBay Hanna HI 991401 pH Gro'Chek® pH and Temperature Monitor	Buy Now!	$87.75
View item on eBay Hanna Instruments Agriculture Test Kit soil test kit	Buy Now!	$89.99
View item on eBay New Hanna Digital Refractometer for Fructose w/ ATC	Buy Now!	$160.99
View item on eBay New Hanna Digital Refractometer for Professional Use	Buy Now!	$160.99
View item on eBay Hanna pH/ORP/EC/Temperature tester meter HI 98204	Buy Now!	$163.99
View item on eBay Hanna HI 8043 Professional Dissolved Oxygen Meter	Buy Now!	$399.99